{"pageNumber":"177","pageRowStart":"4400","pageSize":"25","recordCount":16502,"records":[{"id":70208558,"text":"70208558 - 2011 - Characterizing the performance of ecosystem models across time scales: A spectral analysis of the North American Carbon Program site‐level synthesis","interactions":[],"lastModifiedDate":"2020-02-20T09:57:53","indexId":"70208558","displayToPublicDate":"2011-12-20T16:09:53","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2320,"text":"Journal of Geophysical Research: Biogeosciences","active":true,"publicationSubtype":{"id":10}},"title":"Characterizing the performance of ecosystem models across time scales: A spectral analysis of the North American Carbon Program site‐level synthesis","docAbstract":"<p><span class=\"paraNumber\">[1]<span>&nbsp;</span></span><span>Ecosystem models are important tools for diagnosing the carbon cycle and projecting its behavior across space and time. Despite the fact that ecosystems respond to drivers at multiple time scales, most assessments of model performance do not discriminate different time scales. Spectral methods, such as wavelet analyses, present an alternative approach that enables the identification of the dominant time scales contributing to model performance in the frequency domain. In this study we used wavelet analyses to synthesize the performance of 21 ecosystem models at 9 eddy covariance towers as part of the North American Carbon Program's site‐level intercomparison. This study expands upon previous single‐site and single‐model analyses to determine what patterns of model error are consistent across a diverse range of models and sites. To assess the significance of model error at different time scales, a novel Monte Carlo approach was developed to incorporate flux observation error. Failing to account for observation error leads to a misidentification of the time scales that dominate model error. These analyses show that model error (1) is largest at the annual and 20–120 day scales, (2) has a clear peak at the diurnal scale, and (3) shows large variability among models in the 2–20 day scales. Errors at the annual scale were consistent across time, diurnal errors were predominantly during the growing season, and intermediate‐scale errors were largely event driven. Breaking spectra into discrete temporal bands revealed a significant model‐by‐band effect but also a nonsignificant model‐by‐site effect, which together suggest that individual models show consistency in their error patterns. Differences among models were related to model time step, soil hydrology, and the representation of photosynthesis and phenology but not the soil carbon or nitrogen cycles. These factors had the greatest impact on diurnal errors, were less important at annual scales, and had the least impact at intermediate time scales.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2011JG001661","usgsCitation":"Dietze, M.C., Vargas, R., Richardson, A., Stoy, P.C., Anderson, R., Arain, M.A., Baker, I., Black, T.A., Chen, J.M., Ciais, P., Flanagan, L.B., Gough, C.M., Grant, R., Hollinger, D., Izaurralde, R.C., Kucharik, C., Lafleur, P., Liu, S., Lokupitiya, E., Luo, Y., Munger, J., Peng, C., Poulter, B., Price, D.T., Ricciuto, D., Riley, W.J., Sahoo, A., Schaefer, K., Suyker, A.E., Tian, H., Tonitto, C., Verbeeck, H., Verma, S.B., Wang, W., and Weng, E., 2011, Characterizing the performance of ecosystem models across time scales: A spectral analysis of the North American Carbon Program site‐level synthesis: Journal of Geophysical Research: Biogeosciences, v. 116, no. G4, G04029, 15 p., https://doi.org/10.1029/2011JG001661.","productDescription":"G04029, 15 p.","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":474843,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2011jg001661","text":"Publisher Index Page"},{"id":372380,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada, United States","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -115.6640625,\n              31.952162238024975\n            ],\n            [\n              -93.1640625,\n              29.84064389983441\n            ],\n            [\n              -79.453125,\n              23.563987128451217\n            ],\n            [\n              -51.328125,\n              47.27922900257082\n            ],\n            [\n              -63.6328125,\n              68.78414378041504\n            ],\n            [\n              -77.6953125,\n              73.62778879339942\n            ],\n            [\n              -121.28906250000001,\n              74.4021625984244\n            ],\n            [\n              -126.21093749999999,\n              74.49641311694307\n            ],\n            [\n              -127.96875,\n              71.63599288330609\n            ],\n            [\n              -137.4609375,\n              70.25945200030638\n            ],\n            [\n              -155.7421875,\n              71.41317683396566\n            ],\n            [\n              -168.3984375,\n              69.16255790810501\n            ],\n            [\n              -166.640625,\n              59.88893689676585\n            ],\n            [\n              -164.53125,\n              54.16243396806779\n            ],\n            [\n              -146.95312499999997,\n              60.06484046010452\n            ],\n            [\n              -133.59375,\n              55.97379820507658\n            ],\n            [\n              -124.45312499999999,\n              46.07323062540835\n            ],\n            [\n              -124.45312499999999,\n              39.36827914916014\n            ],\n            [\n              -115.6640625,\n              31.952162238024975\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"116","issue":"G4","noUsgsAuthors":false,"publicationDate":"2011-12-20","publicationStatus":"PW","contributors":{"authors":[{"text":"Dietze, Michael C.","contributorId":15908,"corporation":false,"usgs":true,"family":"Dietze","given":"Michael","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":782472,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vargas, Rodrigo","contributorId":172036,"corporation":false,"usgs":false,"family":"Vargas","given":"Rodrigo","affiliations":[],"preferred":false,"id":782473,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Richardson, Andrew D.","contributorId":105199,"corporation":false,"usgs":true,"family":"Richardson","given":"Andrew D.","affiliations":[],"preferred":false,"id":782474,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stoy, Paul C.","contributorId":204157,"corporation":false,"usgs":false,"family":"Stoy","given":"Paul","email":"","middleInitial":"C.","affiliations":[{"id":36555,"text":"Montana State University","active":true,"usgs":false}],"preferred":false,"id":782475,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Anderson, Ryan","contributorId":106029,"corporation":false,"usgs":true,"family":"Anderson","given":"Ryan","affiliations":[],"preferred":false,"id":782476,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Arain, M. A.","contributorId":192094,"corporation":false,"usgs":false,"family":"Arain","given":"M.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":782477,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Baker, I.","contributorId":192095,"corporation":false,"usgs":false,"family":"Baker","given":"I.","email":"","affiliations":[],"preferred":false,"id":782478,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Black, T. Andrew","contributorId":192437,"corporation":false,"usgs":false,"family":"Black","given":"T.","email":"","middleInitial":"Andrew","affiliations":[],"preferred":false,"id":782479,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Chen, Jing M.","contributorId":202730,"corporation":false,"usgs":false,"family":"Chen","given":"Jing","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":782480,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Ciais, Philippe 0000-0001-8560-4943","orcid":"https://orcid.org/0000-0001-8560-4943","contributorId":197934,"corporation":false,"usgs":false,"family":"Ciais","given":"Philippe","email":"","affiliations":[{"id":35082,"text":"LSCE, CEA CNRS UVSQ IPSL, Université Paris Saclay, 91191 Gif sur Yvette, France","active":true,"usgs":false}],"preferred":false,"id":782481,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Flanagan, Lawrence B.","contributorId":146690,"corporation":false,"usgs":false,"family":"Flanagan","given":"Lawrence","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":782482,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Gough, Christopher M.","contributorId":222555,"corporation":false,"usgs":false,"family":"Gough","given":"Christopher","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":782508,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Grant, Robert","contributorId":222525,"corporation":false,"usgs":false,"family":"Grant","given":"Robert","affiliations":[],"preferred":false,"id":782509,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Hollinger, David","contributorId":222534,"corporation":false,"usgs":false,"family":"Hollinger","given":"David","affiliations":[],"preferred":false,"id":782510,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Izaurralde, R. C.","contributorId":149248,"corporation":false,"usgs":false,"family":"Izaurralde","given":"R.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":782511,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"Kucharik, C.J.","contributorId":51474,"corporation":false,"usgs":true,"family":"Kucharik","given":"C.J.","email":"","affiliations":[],"preferred":false,"id":782512,"contributorType":{"id":1,"text":"Authors"},"rank":16},{"text":"Lafleur, P.","contributorId":23026,"corporation":false,"usgs":true,"family":"Lafleur","given":"P.","email":"","affiliations":[],"preferred":false,"id":782513,"contributorType":{"id":1,"text":"Authors"},"rank":17},{"text":"Liu, Shuguang 0000-0002-6027-3479","orcid":"https://orcid.org/0000-0002-6027-3479","contributorId":213275,"corporation":false,"usgs":true,"family":"Liu","given":"Shuguang","affiliations":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"preferred":false,"id":782514,"contributorType":{"id":1,"text":"Authors"},"rank":18},{"text":"Lokupitiya, E.","contributorId":192091,"corporation":false,"usgs":false,"family":"Lokupitiya","given":"E.","email":"","affiliations":[],"preferred":false,"id":782515,"contributorType":{"id":1,"text":"Authors"},"rank":19},{"text":"Luo, Y.","contributorId":28417,"corporation":false,"usgs":true,"family":"Luo","given":"Y.","email":"","affiliations":[],"preferred":false,"id":782516,"contributorType":{"id":1,"text":"Authors"},"rank":20},{"text":"Munger, J.W.","contributorId":105473,"corporation":false,"usgs":true,"family":"Munger","given":"J.W.","affiliations":[],"preferred":false,"id":782517,"contributorType":{"id":1,"text":"Authors"},"rank":21},{"text":"Peng, Changhui","contributorId":197932,"corporation":false,"usgs":false,"family":"Peng","given":"Changhui","email":"","affiliations":[{"id":6612,"text":"State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling 712100, China","active":true,"usgs":false},{"id":6613,"text":"Center of CEF/ESCER, Department of Biological Science, University of Quebec at Montreal, Montreal H3C 3P8, Canada","active":true,"usgs":false}],"preferred":false,"id":782518,"contributorType":{"id":1,"text":"Authors"},"rank":22},{"text":"Poulter, Benjamin 0000-0002-9493-8600","orcid":"https://orcid.org/0000-0002-9493-8600","contributorId":200477,"corporation":false,"usgs":false,"family":"Poulter","given":"Benjamin","email":"","affiliations":[],"preferred":false,"id":782519,"contributorType":{"id":1,"text":"Authors"},"rank":23},{"text":"Price, David T.","contributorId":222531,"corporation":false,"usgs":false,"family":"Price","given":"David","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":782520,"contributorType":{"id":1,"text":"Authors"},"rank":24},{"text":"Ricciuto, D.","contributorId":192093,"corporation":false,"usgs":false,"family":"Ricciuto","given":"D.","email":"","affiliations":[],"preferred":false,"id":782521,"contributorType":{"id":1,"text":"Authors"},"rank":25},{"text":"Riley, William J. 0000-0002-4615-2304","orcid":"https://orcid.org/0000-0002-4615-2304","contributorId":194645,"corporation":false,"usgs":false,"family":"Riley","given":"William","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":782522,"contributorType":{"id":1,"text":"Authors"},"rank":26},{"text":"Sahoo, A.","contributorId":192109,"corporation":false,"usgs":false,"family":"Sahoo","given":"A.","email":"","affiliations":[],"preferred":false,"id":782523,"contributorType":{"id":1,"text":"Authors"},"rank":27},{"text":"Schaefer, Kevin","contributorId":63323,"corporation":false,"usgs":true,"family":"Schaefer","given":"Kevin","affiliations":[],"preferred":false,"id":782524,"contributorType":{"id":1,"text":"Authors"},"rank":28},{"text":"Suyker, Andrew E.","contributorId":46857,"corporation":false,"usgs":true,"family":"Suyker","given":"Andrew","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":782525,"contributorType":{"id":1,"text":"Authors"},"rank":29},{"text":"Tian, Hanqin","contributorId":117981,"corporation":false,"usgs":true,"family":"Tian","given":"Hanqin","email":"","affiliations":[],"preferred":false,"id":782526,"contributorType":{"id":1,"text":"Authors"},"rank":30},{"text":"Tonitto, Christina","contributorId":22168,"corporation":false,"usgs":false,"family":"Tonitto","given":"Christina","email":"","affiliations":[{"id":12722,"text":"Cornell University","active":true,"usgs":false}],"preferred":false,"id":782527,"contributorType":{"id":1,"text":"Authors"},"rank":31},{"text":"Verbeeck, Hans","contributorId":192111,"corporation":false,"usgs":false,"family":"Verbeeck","given":"Hans","email":"","affiliations":[],"preferred":false,"id":782528,"contributorType":{"id":1,"text":"Authors"},"rank":32},{"text":"Verma, Shashi B.","contributorId":191383,"corporation":false,"usgs":false,"family":"Verma","given":"Shashi","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":782529,"contributorType":{"id":1,"text":"Authors"},"rank":33},{"text":"Wang, W.","contributorId":76003,"corporation":false,"usgs":true,"family":"Wang","given":"W.","affiliations":[],"preferred":false,"id":782530,"contributorType":{"id":1,"text":"Authors"},"rank":34},{"text":"Weng, Ensheng","contributorId":222556,"corporation":false,"usgs":false,"family":"Weng","given":"Ensheng","affiliations":[],"preferred":false,"id":782531,"contributorType":{"id":1,"text":"Authors"},"rank":35}]}}
,{"id":70006285,"text":"sir20115031 - 2011 - U.S. Geological Survey Karst Interest Group Proceedings, Fayetteville, Arkansas, April 26-29, 2011","interactions":[],"lastModifiedDate":"2012-02-02T00:15:57","indexId":"sir20115031","displayToPublicDate":"2011-12-16T09:27:00","publicationYear":"2011","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":334,"text":"Scientific Investigations Report","code":"SIR","onlineIssn":"2328-0328","printIssn":"2328-031X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2011-5031","title":"U.S. Geological Survey Karst Interest Group Proceedings, Fayetteville, Arkansas, April 26-29, 2011","docAbstract":"<p>Karst aquifer systems are present throughout parts of the United States and some of its territories and are developed in carbonate rocks (primarily limestone and dolomite) that span the entire geologic time frame. The depositional environments, diagenetic processes, and post-depositional tectonic events that form carbonate rock aquifers are varied and complex, involving both biological and physical processes that can influence the development of permeability. These factors, combined with the diverse climatic regimes under which karst development in these rocks has taken place result in the unique dual or triple porosity nature of karst aquifers. These complex hydrologic systems often present challenges to scientists attempting to study groundwater flow and contaminant transport.</p>\n<p>The concept for developing a Karst Interest Group evolved from the November 1999 National Groundwater Meeting of the U.S. Geological Survey (USGS), Water Resources Division. As a result, the Karst Interest Group was formed in 2000. The Karst Interest Group is a loose-knit grass-roots organization of USGS employees devoted to fostering better communication among scientists working on, or interested in, karst hydrology studies.</p>\n<p>The mission of the Karst Interest Group is to encourage and support interdisciplinary collaboration and technology transfer among USGS scientists working in karst areas. Additionally, the Karst Interest Group encourages cooperative studies between the different disciplines of the USGS and other Federal agencies, and university researchers or research institutes.</p>\n<p>This fifth workshop is a joint workshop of the USGS Karst Interest Group and University of Arkansas HydroDays workshop, sponsored by the USGS, the Department of Geosciences at the University of Arkansas in Fayetteville. Additional sponsors are: the National Cave and Karst Research Institute, the Edwards Aquifer Authority, San Antonio, Texas, and Beaver Water District, northwest Arkansas. The majority of funding for the proceedings preparation and workshop was provided by the USGS Groundwater Resources Program, National Cooperative Mapping Program, and the Regional Executives of the Northeast, Southeast, Midwest, South Central and Rocky Mountain Areas. The University of Arkansas provided the rooms and facilities for the technical and poster presentations of the workshop, vans for the field trips, and sponsored the HydroDays banquet at the Savoy Experimental Watershed on Wednesday after the technical sessions.</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/sir20115031","collaboration":"Prepared in cooperation with the Department of Geosciences at the University of Arkansas","usgsCitation":"2011, U.S. Geological Survey Karst Interest Group Proceedings, Fayetteville, Arkansas, April 26-29, 2011: U.S. Geological Survey Scientific Investigations Report 2011-5031, vi, 212 p., https://doi.org/10.3133/sir20115031.","productDescription":"vi, 212 p.","startPage":"i","endPage":"212","numberOfPages":"218","costCenters":[{"id":250,"text":"Eastern Water Science Field Team","active":true,"usgs":true}],"links":[{"id":116860,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/sir_2011_5031.jpg"},{"id":112225,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/sir/2011/5031/","linkFileType":{"id":5,"text":"html"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bba70e4b08c986b32818f","contributors":{"editors":[{"text":"Kuniansky, Eve L. 0000-0002-5581-0225 elkunian@usgs.gov","orcid":"https://orcid.org/0000-0002-5581-0225","contributorId":932,"corporation":false,"usgs":true,"family":"Kuniansky","given":"Eve","email":"elkunian@usgs.gov","middleInitial":"L.","affiliations":[{"id":5064,"text":"Southeast Regional Director's Office","active":true,"usgs":true},{"id":509,"text":"Office of the Associate Director for Water","active":true,"usgs":true}],"preferred":true,"id":508304,"contributorType":{"id":2,"text":"Editors"},"rank":1}]}}
,{"id":70006262,"text":"sir20115087 - 2011 - Groundwater conditions in the Brunswick-Glynn County area, Georgia, 2009","interactions":[],"lastModifiedDate":"2017-01-17T11:16:34","indexId":"sir20115087","displayToPublicDate":"2011-12-16T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":334,"text":"Scientific Investigations Report","code":"SIR","onlineIssn":"2328-0328","printIssn":"2328-031X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2011-5087","title":"Groundwater conditions in the Brunswick-Glynn County area, Georgia, 2009","docAbstract":"The Upper Floridan aquifer is contaminated with saltwater in a 2-square-mile area of downtown Brunswick, Georgia. The presence of this saltwater has limited the development of the groundwater supply in the Glynn County area. Hydrologic, geologic, and water-quality data are needed to effectively manage water resources. Since 1959, the U.S. Geological Survey (USGS) has conducted a cooperative water program with the City of Brunswick and Glynn County to monitor and assess the effect of groundwater development on saltwater intrusion within the Floridan aquifer system. The potential development of alternative sources of water in the Brunswick and surficial aquifer systems also is an important consideration in coastal areas.\nDuring calendar year 2009, the cooperative water program included continuous water-level recording of 13 wells completed in the Floridan, Brunswick, and surficial aquifer systems; collecting water levels from 46 wells to map the potentiometric surface of the Upper Floridan aquifer in Glynn County during August 2009; and collecting and analyzing water samples from 55 wells completed in the Floridan aquifer system, of which 27 wells were used to map chloride concentrations in the upper water-bearing zone of the Upper Floridan aquifer in the Brunswick area during August 2009. Periodic water-level measurements also were collected from two wells completed in the Upper Floridan aquifer and four wells completed in the Brunswick aquifer system on Jekyll Island. Equipment was installed on one well to enable real-time specific conductance monitoring in the area surrounding the chloride plume.\nDuring 2008-2009, water levels in 30 of the 32 wells monitored in the Brunswick-Glynn County area rose at a rate of 0.24 to 7.58 feet per year (ft/yr). The largest rise of 7.58 ft/yr was in the Upper Floridan aquifer. These rises corresponded to a period of above normal precipitation and decreased pumping. Declines during 2008-2009 were recorded in wells completed in the Brunswick aquifer system (0.37 ft/yr) and Lower Floridan aquifer (0.83 ft/yr).\nChloride data collected by two local industrial groundwater users at their well fields since 1958 were compiled and compared with data collected by the USGS during the same period. The results indicate that chloride concentrations at the two well fields have continued to rise despite modification of production wells to eliminate deep saline zones and decreases in pumpage at both facilities. One of the industrial users, Pinova Inc., plugged the lower portions of nine production wells in the mid to late 1960s, which generally decreased chloride concentrations to less than 100 milligrams per liter (mg/L) for a period of 10 to 20 years. However, chloride concentrations eventually returned to previous levels despite decreases in pumpage. During 1990-2009, chloride concentrations at the other industrial user's well field (Georgia-Pacific Cellulose LLC) generally increased despite a 16 million gallon per day decrease in pumpage during this period. Data from the Georgia-Pacific Cellulose well field and additional chloride data from USGS observation wells located to the east indicate continued movement of chloride from the source area located southeast of the site toward the well field.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/sir20115087","usgsCitation":"Cherry, G.S., Peck, M., Painter, J.A., and Stayton, W.L., 2011, Groundwater conditions in the Brunswick-Glynn County area, Georgia, 2009: U.S. Geological Survey Scientific Investigations Report 2011-5087, viii, 56 p.; Appendix, https://doi.org/10.3133/sir20115087.","productDescription":"viii, 56 p.; Appendix","costCenters":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"links":[{"id":116834,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/sir_2011_5087.jpg"},{"id":112043,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/sir/2011/5087/","linkFileType":{"id":5,"text":"html"}}],"country":"United States","state":"Georgia","county":"Glynn County","city":"Brunswick","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -84,30 ], [ -84,34 ], [ -80,34 ], [ -80,30 ], [ -84,30 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a2d98e4b0c8380cd5bf45","contributors":{"authors":[{"text":"Cherry, Gregory S. 0000-0002-5567-1587 gccherry@usgs.gov","orcid":"https://orcid.org/0000-0002-5567-1587","contributorId":1567,"corporation":false,"usgs":true,"family":"Cherry","given":"Gregory","email":"gccherry@usgs.gov","middleInitial":"S.","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true},{"id":316,"text":"Georgia Water Science Center","active":true,"usgs":true}],"preferred":true,"id":354174,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Peck, Michael F. mfpeck@usgs.gov","contributorId":1467,"corporation":false,"usgs":true,"family":"Peck","given":"Michael F.","email":"mfpeck@usgs.gov","affiliations":[],"preferred":false,"id":354173,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Painter, Jaime A. 0000-0001-8883-9158 jpainter@usgs.gov","orcid":"https://orcid.org/0000-0001-8883-9158","contributorId":1466,"corporation":false,"usgs":true,"family":"Painter","given":"Jaime","email":"jpainter@usgs.gov","middleInitial":"A.","affiliations":[{"id":316,"text":"Georgia Water Science Center","active":true,"usgs":true},{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"preferred":true,"id":354172,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stayton, Welby L.","contributorId":19573,"corporation":false,"usgs":true,"family":"Stayton","given":"Welby","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":354175,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70006268,"text":"ofr20111020 - 2011 - Summary of hydrologic testing of the Floridan aquifer system at Fort Stewart, Georgia","interactions":[],"lastModifiedDate":"2016-12-08T14:26:37","indexId":"ofr20111020","displayToPublicDate":"2011-12-16T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2011-1020","title":"Summary of hydrologic testing of the Floridan aquifer system at Fort Stewart, Georgia","docAbstract":"Two test wells were completed at Fort Stewart, GA, in January and February 2010 to investigate the potential of using the Lower Floridan aquifer as a source of water to satisfy anticipated increases in water use. One well was completed in the Lower Floridan aquifer at a depth of 1,255 feet below land surface; the other well was completed in the Upper Floridan aquifer at a depth of 560 feet below land surface. The U.S. Geological Survey conducted hydrologic testing at the well site including flowmeter surveys, slug tests within packer-isolated intervals of the Lower Floridan confining unit, and aquifer tests of the Upper and Lower Floridan aquifers.\nFlowmeter surveys at the study site indicate several permeable zones within the Floridan aquifer system. The Upper Floridan aquifer is composed of two water-bearing zones-the upper zone and the lower zone. The upper zone extends from 520 to 650 feet below land surface, contributes 96 percent of the total flow, and is more permeable than the lower zone, which extends from 650 to 705 feet below land surface and contributes the remaining 4 percent of the flow. The Lower Floridan aquifer consists of three zones at depths of 912-947, 1,090-1,139, and 1,211-1,250 feet below land surface that are inter-layered with three less-permeable zones. The Lower Floridan confining unit includes a permeable zone that extends from 793 to 822 feet below land surface. Horizontal hydraulic conductivity values of the Lower Floridan confining unit derived from slug tests within four packer-isolated intervals were from 2 to 20 feet per day, with a high value of 70 feet per day obtained for one of the intervals. Aquifer testing, using analytical techniques and model simulation, indicated the Upper Floridan aquifer had a transmissivity of about 100,000 feet squared per day, and the Lower Floridan aquifer had a transmissivity of 7,000 feet squared per day. Flowmeter surveys, slug tests within packer-isolated intervals, and parameter-estimation results indicate that the hydraulic properties of the Lower Floridan confining unit are similar to those of the Lower Floridan aquifer. Water-level data, for each aquifer test, were filtered for external influences such as barometric pressure, earth-tide effects, and long-term trends to enable detection of small water-level responses to aquifer-test pumping of less than 1 foot. During a 72-hour aquifer test of the Lower Floridan aquifer, a drawdown response of 0.3 to 0.4 foot was observed in two Upper Floridan aquifer wells, one of which was more than 1 mile away from the pumped well.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20111020","collaboration":"Prepared in cooperation with the U.S. Department of the Army","usgsCitation":"Gonthier, G., 2011, Summary of hydrologic testing of the Floridan aquifer system at Fort Stewart, Georgia: U.S. Geological Survey Open-File Report 2011-1020, viii, 28 p., https://doi.org/10.3133/ofr20111020.","productDescription":"viii, 28 p.","costCenters":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"links":[{"id":116848,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr_2011_1020.jpg"},{"id":112047,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2011/1020/","linkFileType":{"id":5,"text":"html"}}],"country":"United States","state":"Georgia","otherGeospatial":"Floridan aquifer system","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -82,31.5 ], [ -82,32.333333333333336 ], [ -80.75,32.333333333333336 ], [ -80.75,31.5 ], [ -82,31.5 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9e8fe4b08c986b31dfa3","contributors":{"authors":[{"text":"Gonthier, Gerard  0000-0003-4078-8579 gonthier@usgs.gov","orcid":"https://orcid.org/0000-0003-4078-8579","contributorId":3141,"corporation":false,"usgs":true,"family":"Gonthier","given":"Gerard ","email":"gonthier@usgs.gov","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"preferred":false,"id":354186,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70006265,"text":"ofr20111001 - 2011 - Evaluation of landslide monitoring in the Polish Carpathians","interactions":[],"lastModifiedDate":"2012-02-02T00:15:56","indexId":"ofr20111001","displayToPublicDate":"2011-12-16T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2011-1001","title":"Evaluation of landslide monitoring in the Polish Carpathians","docAbstract":"In response to the June 15, 2010 request from the Polish Geological Institute (PGI) to the U.S. Geological Survey (USGS) for assistance and advice regarding real-time landslide monitoring, landslide specialists from the USGS Landslide Hazard Program visited PGI headquarters and field sites in September 2010. During our visit we became familiar with characteristics of landslides in the Polish Carpathians, reviewed PGI monitoring techniques, and assessed needs for monitoring at recently activated landslides. Visits to several landslides that are monitored by PGI (the Just, Ha&#324;czowa, Szymbark, Siercza and &#321;as&#324;ica landslides) revealed that current data collection (monthly GPS and inclinometer surveys, hourly piezometers readings) is generally sufficient for collecting basic information about landslide displacement, depth, and groundwater conditions. Large landslides are typically hydrologically complex, and we would expect such complexity in Carpathian landslides, given the alternating shale and sandstone stratigraphy and complex geologic structures of the flysch bedrock. Consequently groundwater observations could be improved by installing several piezometers that sample the basal shear zone of each landslide being monitored by PGI. These could be supplemented by additional piezometers at shallower depths to help clarify general flow directions and hydraulic gradients. Remedial works at Ha&#324;czowa\nmake the landslide unsuitable for monitoring as part of an early warning\nnetwork. Monitoring there should focus on continued performance of the remedial\nworks.\nOur suggestions for new monitoring at recently activated landslides are summarized in table 1. Displacement\nmonitoring using extensometers and (or) GPS is a high priority at K&#322;odne, &#321;a&#347;nica,\n&#321;azki, and Siedloki. Geomorphologic mapping of active surface features\n(scarps, cracks, shear zones, folds, and thrusts) in sufficient detail to\nreveal the kinematics of each landslide would greatly help in planning\nsubsurface exploration and monitoring. Mapping should take advantage of\nexisting and future airborne lidar data sets of specific areas, where\navailable. Borehole inclinometers and piezometers would complete the basic\nmonitoring package for these landslides. The landslide at K&#322;odne may be\nwell suited for more detailed monitoring for landslide process research,\nalthough research opportunities exist at the other landslides as well. The\nlandslide near Siedloki may be a good candidate for terrestrial laser scanning\n(TLS). Tandem streamflow gages upstream and downstream from the Siedloki\nlandslide, or laser distance meters to monitor advancement of the toe, may be\nneeded to provide warning of stream blockage of Potok Milowski. A real-time\nwarning system specifically for the &#321;azki landslide might be considered due\nto potential concerns about catastrophic movement into Mi&#281;dzybrodzie\nReservoir.\nChallenges associated with the establishment of a complete real-time monitoring and early warning system are\nfar greater than just the technical and logistical aspects of installing remote\nmonitoring systems at a large number of landslides. Long-term maintenance of a\nlandslide monitoring network will involve considerable effort and expense as\nsensors break-down from exposure to weather, landslide movement, and harsh\nunderground environmental conditions.\nOnce PGI&rsquo;s planned pilot network\nof 10-20 monitored landslides is operating, a period of observation and\nanalysis will be needed to establish appropriate alert levels and criteria for\nissuing alerts and warnings. Simultaneously, discussions with authorities will\nbe needed to develop action plans for responding to landslide notifications and\n(or) warnings. Public resistance to landslide warnings and mandated evacuations\nmay be high given the low historical incidence of fatalities and injuries\nresulting from Carpathian landslides and the small potential for warnings to\nreduce landslide damage to homes and land. Careful weighing of purpose,\nadvantages, and costs of a large-scale monitoring and early warning program is\nneeded early in the planning process and should be revisited regularly\nthroughout pilot and final implementation.\nIn this report, we present a generic plan for monitoring of a hypothetical Carpathian landslide that\nillustrates how our suggestions for each of the specific landslides could be\nimplemented. The plan includes basic pore pressure, displacement, and weather\nmonitoring, along with supplemental monitoring for special conditions at\nspecific landslides. Table 2 summarizes the overall approach and basic\nequipment and software requirements.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20111001","collaboration":"In cooperation with the Polish Geological Institute","usgsCitation":"Collins, B., Baum, R.L., Mrozek, T., Nescieruk, P., Perski, Z., Raczkowski, W., and Graniczny, M., 2011, Evaluation of landslide monitoring in the Polish Carpathians (Modified March 1, 2011): U.S. Geological Survey Open-File Report 2011-1001, v, 28 p.; Appendix, https://doi.org/10.3133/ofr20111001.","productDescription":"v, 28 p.; Appendix","onlineOnly":"Y","costCenters":[{"id":671,"text":"Western Region Geology and Geophysics Science Center","active":false,"usgs":true}],"links":[{"id":116847,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr_2011_1001.gif"},{"id":112046,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2011/1001/","linkFileType":{"id":5,"text":"html"}}],"edition":"Modified March 1, 2011","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0c8fe4b0c8380cd52bd0","contributors":{"authors":[{"text":"Collins, Brian D.","contributorId":71641,"corporation":false,"usgs":true,"family":"Collins","given":"Brian D.","affiliations":[],"preferred":false,"id":354182,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Baum, Rex L. 0000-0001-5337-1970 baum@usgs.gov","orcid":"https://orcid.org/0000-0001-5337-1970","contributorId":1288,"corporation":false,"usgs":true,"family":"Baum","given":"Rex","email":"baum@usgs.gov","middleInitial":"L.","affiliations":[{"id":300,"text":"Geologic Hazards Science Center","active":true,"usgs":true}],"preferred":true,"id":354179,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mrozek, Teresa","contributorId":86889,"corporation":false,"usgs":true,"family":"Mrozek","given":"Teresa","email":"","affiliations":[],"preferred":false,"id":354184,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nescieruk, Piotr","contributorId":99281,"corporation":false,"usgs":true,"family":"Nescieruk","given":"Piotr","email":"","affiliations":[],"preferred":false,"id":354185,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Perski, Zbigniew","contributorId":41579,"corporation":false,"usgs":true,"family":"Perski","given":"Zbigniew","email":"","affiliations":[],"preferred":false,"id":354181,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Raczkowski, Wojciech","contributorId":78463,"corporation":false,"usgs":true,"family":"Raczkowski","given":"Wojciech","email":"","affiliations":[],"preferred":false,"id":354183,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Graniczny, Marek","contributorId":10146,"corporation":false,"usgs":true,"family":"Graniczny","given":"Marek","email":"","affiliations":[],"preferred":false,"id":354180,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70006264,"text":"sir20115130 - 2011 - Water withdrawals, wastewater discharge, and water consumption in the Apalachicola-Chattahoochee-Flint River Basin, 2005, and water-use trends, 1970-2005","interactions":[],"lastModifiedDate":"2014-05-29T13:52:20","indexId":"sir20115130","displayToPublicDate":"2011-12-16T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":334,"text":"Scientific Investigations Report","code":"SIR","onlineIssn":"2328-0328","printIssn":"2328-031X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2011-5130","title":"Water withdrawals, wastewater discharge, and water consumption in the Apalachicola-Chattahoochee-Flint River Basin, 2005, and water-use trends, 1970-2005","docAbstract":"The Apalachicola-Chattahoochee-Flint (ACF) River Basin covers about 20,500 square miles that drains parts of Alabama, Florida, and Georgia. The basin extends from its headwaters northern Georgia to the Gulf of Mexico. Population in the basin was estimated to be 3.7 million in 2005, an increase of about 41 percent from the 1990 population of 2.6 million. In 2005, slightly more than 721,000 acres of crops were irrigated within the basin.\n\nIn 2005, the total amount of water withdrawn in the ACF River Basin was about 1,990 million gallons per day (Mgal/d). Of this, surface water accounted for 1,591 Mgal/d (80 percent) and groundwater accounted for 399 Mgal/d (20 percent). Surface water was the primary water source of withdrawals in the northern and central parts of the basin, and groundwater was the primary source in the southern part. The largest surface-water withdrawals was from Cobb County, Georgia (410 Mgal/d, mostly from the Chattahoochee River and Lake Alatoona), and the largest groundwater withdrawals was from Dougherty County, Georgia (38 Mgal/d, mostly from the Upper Floridan aquifer system).\nThermoelectric power generation accounted for the largest water withdrawals in 2005 at 788 Mgal/d (40 percent). Most of these withdrawals were used for once-through cooling, and nearly all water used for this purpose was returned to its source. Public supply accounted for 609 Mgal/d (30 percent) of total withdrawals in 2005, followed by agricultural self-supplied (including crop, golf course irrigation, and livestock) at 365 Mgal/d (18 percent), commercial-industrial self-supplied (including mining) at 191 Mgal/d (10 percent), and domestic self-supplied at 37 Mgal/d (2 percent). Public-supply withdrawals were lowest during January, February, and March (about 500 Mgal/d), and highest during September (about 700 Mgal/d).\nAs the population of the ACF River Basin increased by 1.7 million (83 percent) in the 35 years between 1970 and 2005, total withdrawals in the basin increased by more than 515 Mgal/d (35 percent). Of this increase, surface-water accounted for 206 Mgal/d (15 percent) and groundwater accounted for 309 Mgal/d (350 percent). Since 1980, total water withdrawals have generally declined, except in 2000 when they peaked because of below-average rainfall.\nIn 2000, an estimated 49 percent of the water withdrawn for public supply in the basin was consumed, and the remaining 51 percent was returned to the hydrologic system through wastewater treatment systems. In 2005, an estimated 38 percent was consumed and 62 percent was returned to the hydrologic system. This contrast between water withdrawals and wastewater discharges for these years was caused primarily by below-average rainfall during 2000 (a dry year) and above-average rainfall during 2005 (a wet year).","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/sir20115130","collaboration":"Prepared in cooperation with the Florida Department of Environmental Protection","usgsCitation":"Marella, R.L., and Fanning, J.L., 2011, Water withdrawals, wastewater discharge, and water consumption in the Apalachicola-Chattahoochee-Flint River Basin, 2005, and water-use trends, 1970-2005: U.S. Geological Survey Scientific Investigations Report 2011-5130, viii, 34 p., https://doi.org/10.3133/sir20115130.","productDescription":"viii, 34 p.","temporalStart":"1970-01-01","temporalEnd":"2005-12-31","costCenters":[{"id":285,"text":"Florida Water Science Center","active":false,"usgs":true}],"links":[{"id":116859,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/sir_2011_5130.jpg"},{"id":112045,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/sir/2011/5130/","linkFileType":{"id":5,"text":"html"}}],"state":"Alabama;Florida;Georgia","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -86,29 ], [ -86,35 ], [ -83,35 ], [ -83,29 ], [ -86,29 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bccd2e4b08c986b32dd42","contributors":{"authors":[{"text":"Marella, Richard L. 0000-0003-4861-9841 rmarella@usgs.gov","orcid":"https://orcid.org/0000-0003-4861-9841","contributorId":2443,"corporation":false,"usgs":true,"family":"Marella","given":"Richard","email":"rmarella@usgs.gov","middleInitial":"L.","affiliations":[{"id":27821,"text":"Caribbean-Florida Water Science Center","active":true,"usgs":true},{"id":5051,"text":"FLWSC-Orlando","active":true,"usgs":true}],"preferred":true,"id":354177,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fanning, Julia L.","contributorId":73981,"corporation":false,"usgs":true,"family":"Fanning","given":"Julia","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":354178,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70006263,"text":"sir20115127 - 2011 - Factors that influence the hydrologic recovery of wetlands in the Northern Tampa Bay area, Florida","interactions":[],"lastModifiedDate":"2012-03-08T17:16:42","indexId":"sir20115127","displayToPublicDate":"2011-12-16T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":334,"text":"Scientific Investigations Report","code":"SIR","onlineIssn":"2328-0328","printIssn":"2328-031X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2011-5127","title":"Factors that influence the hydrologic recovery of wetlands in the Northern Tampa Bay area, Florida","docAbstract":"Reductions in groundwater withdrawals from Northern Tampa Bay well fields were initiated in mid-2002 to improve the hydrologic condition of wetlands in these areas by allowing surface and groundwater levels to recover to previously higher levels. Following these reductions, water levels at some long-term wetland monitoring sites have recovered, while others have not recovered as expected. To understand why water levels for some wetlands have not increased, nine wetlands with varying impacts from well field pumping were examined based on four factors known to influence the hydrologic condition of wetlands in west-central Florida. These factors are the level of the potentiometric surface of the Upper Floridan aquifer underlying the wetland, recent karst activity near and beneath the wetland, permeability of the underlying sediments, and the topographic position of the wetland in the landscape.\nThe combination of two factors, the presence of recent karst activity below or near the wetlands and the depth to the potentiometric surface of the Upper Floridan aquifer below the wetlands, had the most influence on the hydrologic recovery of the study wetlands. The study wetlands are located in an area where numerous localized surface or buried depressions (karst features or sinkholes) are common throughout the mantled karst landscape, which increases the hydrologic connection between the wetlands and the underlying aquifers. Breaches or breaks in the underlying sediments or in the intermediate confining unit due to recent karst subsidence activity act as pathways for downward leakage. For the study wetlands, the leakage potential increased when the vertical separation between the potentiometric surface of the Upper Floridan aquifer and the wetland-bottom elevation (a surrogate for the wetland water level) increased.\nThe increase in the potentiometric surface of the Upper Floridan aquifer below the wetland was the primary factor influencing the hydrologic recovery of the study wetlands, even in areas affected by karst subsidence. For one of the study wetlands influenced by karst subsidence (S-44 Cypress at Starkey well field), the potentiometric surface of the Upper Floridan aquifer increased to the level of the wetland-bottom elevation following the reductions in groundwater withdrawals. Despite the karst subsidence in the wetland, having the level of the potentiometric surface just below the wetland bottom limited the downward leakage potential and resulted in an increase in the flooded area and duration of the wetland hydroperiod.\nIn contrast, two study wetlands affected by karst subsidence (W-12 Cypress and W-16 Marsh at Cypress Creek) remained mostly dry during the period of groundwater withdrawal reductions, even though the median elevation of the potentiometric surface of the Upper Floridan aquifer rose about 5 feet in this area of the well field. These wetlands are located in an area of the well field where large groundwater withdrawals are concentrated, and during the last 20 years (1989-2009) the wetlands were inundated only during periods of extreme rainfall. During these brief inundation periods, the wetland water levels receded after 1 to 2 months, much more rapidly than wetlands located in areas without karst subsidence or concentrated pumping, indicating the increased leakage between the wetlands and underlying aquifers. Because of this interconnection, water levels in these wetlands and others impacted by karst subsidence in this region will not recover if the potentiometric surface of the Upper Floridan aquifer remains at its current (2009) elevation (median distance of about 10 feet below the wetland-bottom elevation).\nLow permeability sediments and the absence of karst features underlying the wetlands had a positive influence on the wetland recovery following the reductions in groundwater withdrawals. In these settings, intact low permeability subsurface layers help maintain water within and beneath the wetland, and limit the downward leakage potential to the Upper Floridan aquifer. For wetlands in these settings, the increase in potentiometric surface of the Upper Floridan aquifer below the study wetland-bottom elevations resulted in an increase in the flooded area and the duration of the wetland hydroperiod.\nAlthough of less importance than the other three factors, a low-lying topographical position benefited the hydrologic condition of several of the study wetlands (S-68 Cypress and W-12 Cypress) both before and after the reductions in groundwater withdrawals. Compared to wetlands in a higher topographical position, those in a lower position had longer hydroperiods because of their greater ability to receive more runoff from higher elevation wetlands and to establish surface-water connections to other isolated wetlands and surface-water bodies through low-lying surface-water channels during wet conditions. In addition, wetlands in low-lying areas benefited from groundwater inflow when groundwater levels were higher than wetland water levels.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/sir20115127","collaboration":"Prepared in cooperation with the Southwest Florida Water Management District and Tampa Bay Water","usgsCitation":"Metz, P.A., 2011, Factors that influence the hydrologic recovery of wetlands in the Northern Tampa Bay area, Florida: U.S. Geological Survey Scientific Investigations Report 2011-5127, viii, 54 p.; Appendices, https://doi.org/10.3133/sir20115127.","productDescription":"viii, 54 p.; Appendices","costCenters":[{"id":285,"text":"Florida Water Science Center","active":false,"usgs":true}],"links":[{"id":116856,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/sir_2011_5127.jpg"},{"id":112044,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/sir/2011/5127/","linkFileType":{"id":5,"text":"html"}}],"state":"Florida","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -83,27.5 ], [ -83,28.75 ], [ -82,28.75 ], [ -82,27.5 ], [ -83,27.5 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0edbe4b0c8380cd53665","contributors":{"authors":[{"text":"Metz, P. A.","contributorId":68706,"corporation":false,"usgs":true,"family":"Metz","given":"P.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":354176,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70006261,"text":"sir20115190 - 2011 - TOPMODEL simulations of streamflow and depth to water table in Fishing Brook Watershed, New York, 2007-09","interactions":[],"lastModifiedDate":"2012-03-08T17:16:42","indexId":"sir20115190","displayToPublicDate":"2011-12-16T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":334,"text":"Scientific Investigations Report","code":"SIR","onlineIssn":"2328-0328","printIssn":"2328-031X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2011-5190","title":"TOPMODEL simulations of streamflow and depth to water table in Fishing Brook Watershed, New York, 2007-09","docAbstract":"TOPMODEL, a physically based, variable-source area rainfall-runoff model, was used to simulate streamflow and depth to water table for the period January 2007-September 2009 in the 65.6 square kilometers of Fishing Brook Watershed in northern New York. The Fishing Brook Watershed is located in the headwaters of the Hudson River and is predominantly forested with a humid, cool continental climate. The motivation for applying this model at Fishing Brook was to provide a simulation that would be effective later at this site in modeling the interaction of hydrologic processes with mercury dynamics.\nTOPMODEL uses a topographic wetness index computed from surface-elevation data to simulate streamflow and subsurface-saturation state, represented by the saturation deficit. Depth to water table was computed from simulated saturation-deficit values using computed soil properties. In the Fishing Brook Watershed, TOPMODEL was calibrated to the natural logarithm of streamflow at the study area outlet and depth to water table at Sixmile Wetland using a combined multiple-objective function. Runoff and depth to water table responded differently to some of the model parameters, and the combined multiple-objective function balanced the goodness-of-fit of the model realizations with respect to these parameters. Results show that TOPMODEL reasonably simulated runoff and depth to water table during the study period. The simulated runoff had a Nash-Sutcliffe efficiency of 0.738, but the model underpredicted total runoff by 14 percent. Depth to water table computed from simulated saturation-deficit values matched observed water-table depth moderately well; the root mean squared error of absolute depth to water table was 91 millimeters (mm), compared to the mean observed depth to water table of 205 mm. The correlation coefficient for temporal depth-to-water-table fluctuations was 0.624. The variability of the TOPMODEL simulations was assessed using prediction intervals grouped using the combined multiple-objective function. The calibrated TOPMODEL results for the entire study area were applied to several subwatersheds within the study area using computed hydrogeomorphic properties of the subwatersheds.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/sir20115190","collaboration":"National Water-Quality Assessment Program","usgsCitation":"Nystrom, E.A., and Burns, D.A., 2011, TOPMODEL simulations of streamflow and depth to water table in Fishing Brook Watershed, New York, 2007-09: U.S. Geological Survey Scientific Investigations Report 2011-5190, xii, 54 p., https://doi.org/10.3133/sir20115190.","productDescription":"xii, 54 p.","temporalStart":"2007-01-01","temporalEnd":"2009-12-31","costCenters":[{"id":474,"text":"New York Water Science Center","active":true,"usgs":true}],"links":[{"id":116837,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/sir_2011_5190.gif"},{"id":112041,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/sir/2011/5190/","linkFileType":{"id":5,"text":"html"}}],"state":"New York","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -74.4,43.93333333333333 ], [ -74.4,44.03333333333333 ], [ -74.25,44.03333333333333 ], [ -74.25,43.93333333333333 ], [ -74.4,43.93333333333333 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba38ee4b08c986b31fd60","contributors":{"authors":[{"text":"Nystrom, Elizabeth A. 0000-0002-0886-3439 nystrom@usgs.gov","orcid":"https://orcid.org/0000-0002-0886-3439","contributorId":1072,"corporation":false,"usgs":true,"family":"Nystrom","given":"Elizabeth","email":"nystrom@usgs.gov","middleInitial":"A.","affiliations":[{"id":474,"text":"New York Water Science Center","active":true,"usgs":true}],"preferred":true,"id":354170,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Burns, Douglas A. 0000-0001-6516-2869 daburns@usgs.gov","orcid":"https://orcid.org/0000-0001-6516-2869","contributorId":1237,"corporation":false,"usgs":true,"family":"Burns","given":"Douglas","email":"daburns@usgs.gov","middleInitial":"A.","affiliations":[{"id":474,"text":"New York Water Science Center","active":true,"usgs":true}],"preferred":true,"id":354171,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70006250,"text":"sir20115137 - 2011 - Estimated hydrologic budgets of kettle-hole ponds in coastal aquifers of southeastern Massachusetts","interactions":[],"lastModifiedDate":"2018-05-17T13:34:02","indexId":"sir20115137","displayToPublicDate":"2011-12-15T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":334,"text":"Scientific Investigations Report","code":"SIR","onlineIssn":"2328-0328","printIssn":"2328-031X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2011-5137","title":"Estimated hydrologic budgets of kettle-hole ponds in coastal aquifers of southeastern Massachusetts","docAbstract":"Kettle-hole ponds in southeastern Massachusetts are in good hydraulic connection to an extensive coastal aquifer system that includes the Plymouth-Carver aquifer system on the mainland and aquifers underlying Cape Cod. The ponds receive water from, and contribute water to, the underlying glacial aquifer; ponds also receive water from precipitation and lose water to evaporation from the pond surface. Some ponds are connected to surface-water drainage systems and receive water from or contribute water to streams or adjacent wetlands. The Massachusetts Department of Environmental Protection currently (2011) is developing Total Maximum Daily Loads of phosphorus for the freshwater ponds in the region to maintain the health of pond ecosystems; the amounts and sources of water fluxes into and out of the ponds are important factors in determining the amount of phosphorus that can be assimilated into a pond. To assist in this effort, the U.S. Geological Survey used groundwater-flow models of the coastal aquifer system to estimate hydrologic budgets-including inflows and outflows from the aquifer system and adjacent streams and wetlands, and recharge from precipitation-for 425 ponds in southeastern Massachusetts.\nWater fluxes through the ponds are a function of several factors, including the size, shape, and bathymetry of the pond, orientation of the pond relative to the regional hydraulic gradient, and hydrologic setting relative to the proximity of groundwater divides and discharge boundaries. Total steady-state fluxes through the ponds range from more than 3,300,000 to less than 2,000 cubic feet per day. For ponds without surface-water inlets or outlets, groundwater inflow accounts for 98 to 3 percent of total inflow; conversely, recharge onto the pond surface accounts for the remainder of inflow (between 2 and 97 percent). All natural flows from these ponds are through recharge from the pond into the aquifer. In one pond, about 94 percent of the total outflow is removed for water supply. For ponds that are connected to surface-water drainages, most inflow and outflow are through streams. Ponds that receive water from streams receive most (58 to 89 percent) of their water from those streams. Ponds that are drained by streams lose between 5 and 100 percent of their water to those streams.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/sir20115137","collaboration":"Prepared in cooperation with the Massachusetts Department of Environmental Protection","usgsCitation":"Walter, D.A., and Masterson, J., 2011, Estimated hydrologic budgets of kettle-hole ponds in coastal aquifers of southeastern Massachusetts: U.S. Geological Survey Scientific Investigations Report 2011-5137, iv, 32 p.; Appendix, https://doi.org/10.3133/sir20115137.","productDescription":"iv, 32 p.; Appendix","costCenters":[{"id":376,"text":"Massachusetts Water Science Center","active":true,"usgs":true},{"id":466,"text":"New England Water Science Center","active":true,"usgs":true}],"links":[{"id":112026,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/sir/2011/5137/","linkFileType":{"id":5,"text":"html"}},{"id":116807,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/sir_2011_5137.gif"}],"state":"Massachusetts","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -70.86749999999999,41.5 ], [ -70.86749999999999,42.1175 ], [ -69.86749999999999,42.1175 ], [ -69.86749999999999,41.5 ], [ -70.86749999999999,41.5 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0a93e4b0c8380cd523ce","contributors":{"authors":[{"text":"Walter, Donald A. 0000-0003-0879-4477 dawalter@usgs.gov","orcid":"https://orcid.org/0000-0003-0879-4477","contributorId":1101,"corporation":false,"usgs":true,"family":"Walter","given":"Donald","email":"dawalter@usgs.gov","middleInitial":"A.","affiliations":[{"id":466,"text":"New England Water Science Center","active":true,"usgs":true}],"preferred":true,"id":354149,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Masterson, John P. 0000-0003-3202-4413 jpmaster@usgs.gov","orcid":"https://orcid.org/0000-0003-3202-4413","contributorId":1865,"corporation":false,"usgs":true,"family":"Masterson","given":"John P.","email":"jpmaster@usgs.gov","affiliations":[{"id":466,"text":"New England Water Science Center","active":true,"usgs":true}],"preferred":false,"id":354150,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70006239,"text":"ofr20111292 - 2011 - Kirschenmann Road multi-well monitoring site, Cuyama Valley, Santa Barbara County, California","interactions":[],"lastModifiedDate":"2012-03-08T17:16:42","indexId":"ofr20111292","displayToPublicDate":"2011-12-14T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2011-1292","title":"Kirschenmann Road multi-well monitoring site, Cuyama Valley, Santa Barbara County, California","docAbstract":"The U.S. Geological Survey (USGS), in cooperation with the Water Agency Division of the Santa Barbara County Department of Public Works, is evaluating the geohydrology and water availability of the Cuyama Valley, California (fig. 1). As part of this evaluation, the USGS installed the Cuyama Valley Kirschenmann Road multiple-well monitoring site (CVKR) in the South-Main subregion of the Cuyama Valley (fig. 1). The CVKR well site is designed to allow for the collection of depth-specific water-level and water-quality data. Data collected at this site provides information about the geology, hydrology, geophysics, and geochemistry of the local aquifer system, thus, enhancing the understanding of the geohydrologic framework of the Cuyama Valley. This report presents the construction information and initial geohydrologic data collected from the CVKR monitoring site, along with a brief comparison to selected supply and irrigation wells from the major subregions of the Cuyama Valley (fig. 1).","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20111292","collaboration":"Prepared in cooperation with the Water Agency Division of the Santa Barbara County Department of Public Works","usgsCitation":"Everett, R., Hanson, R.T., and Sweetkind, D.S., 2011, Kirschenmann Road multi-well monitoring site, Cuyama Valley, Santa Barbara County, California: U.S. Geological Survey Open-File Report 2011-1292, 4 p., https://doi.org/10.3133/ofr20111292.","productDescription":"4 p.","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":116694,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr_2011_1292.jpg"},{"id":111136,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2011/1292/","linkFileType":{"id":5,"text":"html"}}],"country":"United States","state":"California","county":"Santa Barbara","otherGeospatial":"Cuyama Valley","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -120.33333333333333,34.61666666666667 ], [ -120.33333333333333,35.333333333333336 ], [ -119,35.333333333333336 ], [ -119,34.61666666666667 ], [ -120.33333333333333,34.61666666666667 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a40b1e4b0c8380cd64f86","contributors":{"authors":[{"text":"Everett, R.R.","contributorId":81954,"corporation":false,"usgs":true,"family":"Everett","given":"R.R.","email":"","affiliations":[],"preferred":false,"id":354137,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hanson, R. T.","contributorId":91148,"corporation":false,"usgs":true,"family":"Hanson","given":"R.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":354138,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sweetkind, D. S.","contributorId":61507,"corporation":false,"usgs":true,"family":"Sweetkind","given":"D.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":354136,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70006205,"text":"fs20113147 - 2011 - Historical streamflows of Double Mountain Fork of Brazos River and water-surface elevations of Lake Alan Henry, Garza County, Texas, water years 1962-2010","interactions":[],"lastModifiedDate":"2016-08-11T15:16:32","indexId":"fs20113147","displayToPublicDate":"2011-12-12T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":313,"text":"Fact Sheet","code":"FS","onlineIssn":"2327-6932","printIssn":"2327-6916","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2011-3147","title":"Historical streamflows of Double Mountain Fork of Brazos River and water-surface elevations of Lake Alan Henry, Garza County, Texas, water years 1962-2010","docAbstract":"<p>The U.S. Geological Survey (USGS), in cooperation with the City of Lubbock, Texas, operates two surface-water stations in Garza County, Tex.: USGS streamflow-gaging station 08079600 Double Mountain Fork Brazos River at Justiceburg, Tex., and 08079700 Lake Alan Henry Reservoir, a water-supply reservoir about 60 miles southeast of Lubbock, Tex., and about 10 miles east of Justiceburg, Tex. The streamflow and water-surface elevation data from the two stations are useful to water-resource managers and planners in support of forecasting and water-resource infrastructure operations and are used in regional hydrologic studies.</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/fs20113147","collaboration":"Prepared in cooperation with the City of Lubbock","usgsCitation":"Asquith, W.H., and Vrabel, J., 2011, Historical streamflows of Double Mountain Fork of Brazos River and water-surface elevations of Lake Alan Henry, Garza County, Texas, water years 1962-2010: U.S. Geological Survey Fact Sheet 2011-3147, 6 p., https://doi.org/10.3133/fs20113147.","productDescription":"6 p.","startPage":"1","endPage":"6","numberOfPages":"6","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":583,"text":"Texas Water Science Center","active":true,"usgs":true}],"links":[{"id":116753,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/fs_2011_3147.gif"},{"id":111039,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/fs/2011/3147/","linkFileType":{"id":5,"text":"html"}}],"scale":"24000","projection":"Universal Transverse Mercator","datum":"NAD 83","country":"United States","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -101.25,32.93333333333333 ], [ -101.25,33.11666666666667 ], [ -100.91666666666667,33.11666666666667 ], [ -100.91666666666667,32.93333333333333 ], [ -101.25,32.93333333333333 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a31a0e4b0c8380cd5e0aa","contributors":{"authors":[{"text":"Asquith, William H. 0000-0002-7400-1861 wasquith@usgs.gov","orcid":"https://orcid.org/0000-0002-7400-1861","contributorId":1007,"corporation":false,"usgs":true,"family":"Asquith","given":"William","email":"wasquith@usgs.gov","middleInitial":"H.","affiliations":[{"id":48595,"text":"Oklahoma-Texas Water Science Center","active":true,"usgs":true}],"preferred":true,"id":354058,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vrabel, Joseph 0000-0002-8773-0764 jvrabel@usgs.gov","orcid":"https://orcid.org/0000-0002-8773-0764","contributorId":1577,"corporation":false,"usgs":true,"family":"Vrabel","given":"Joseph","email":"jvrabel@usgs.gov","affiliations":[{"id":583,"text":"Texas Water Science Center","active":true,"usgs":true}],"preferred":true,"id":354059,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70006168,"text":"sir20115179 - 2011 - Monitoring to assess progress toward meeting the Assabet River, Massachusetts, phosphorus total maximum daily load - Aquatic macrophyte biomass and sediment-phosphorus flux","interactions":[],"lastModifiedDate":"2018-10-15T07:47:49","indexId":"sir20115179","displayToPublicDate":"2011-12-06T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":334,"text":"Scientific Investigations Report","code":"SIR","onlineIssn":"2328-0328","printIssn":"2328-031X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2011-5179","title":"Monitoring to assess progress toward meeting the Assabet River, Massachusetts, phosphorus total maximum daily load - Aquatic macrophyte biomass and sediment-phosphorus flux","docAbstract":"In 2004, the Total Maximum Daily Load (TMDL) for Total Phosphorus in the Assabet River, Massachusetts, was approved by the U.S. Environmental Protection Agency. The goal of the TMDL was to decrease the concentrations of the nutrient phosphorus to mitigate some of the instream ecological effects of eutrophication on the river; these effects were, for the most part, direct consequences of the excessive growth of aquatic macrophytes. The primary instrument effecting lower concentrations of phosphorus was to be strict control of phosphorus releases from four major wastewatertreatment plants in Westborough, Marlborough, Hudson, and Maynard, Massachusetts. The improvements to be achieved from implementing this control were lower concentrations of total and dissolved phosphorus in the river, a 50-percent reduction in aquatic-plant biomass, a 30-percent reduction in episodes of dissolved oxygen supersaturation, no low-flow dissolved oxygen concentrations less than 5.0 milligrams per liter, and a 90-percent reduction in sediment releases of phosphorus to the overlying water.  In 2007, the U.S. Geological Survey, in cooperation with the Massachusetts Department of Environmental Protection, initiated studies to evaluate conditions in the Assabet River prior to the upgrading of wastewater-treatment plants to remove more phosphorus from their effluents. The studies, completed in 2008, implemented a visual monitoring plan to evaluate the extent and biomass of the floating macrophyte Lemna minor (commonly known as lesser duckweed) in five impoundments and evaluated the potential for phosphorus flux from sediments in impounded and free-flowing reaches of the river.  Hydrologically, the two study years 2007 and 2008 were quite different. In 2007, summer streamflows, although low, were higher than average, and in 2008, the flows were generally higher than in 2007. Visually, the effects of these streamflow differences on the distribution of Lemna were obvious. In 2007, large amounts of floating macrophytes accumulated behind bridge constrictions and dams; in 2008, high flows during the early part of the growing season carried floating macrophytes past bridges and over dams, minimizing accumulations. Samples of Lemna were collected and weighed to provide an estimate of Lemna biomass based on areal coverage during the summer growing seasons at eight sites in the five impoundments. Average estimated biomass during 2007 was approximately twice the 2008 biomass in each of the areas monitored. In 2007, in situ hyperspectral and high-resolution, multispectral data from the IKONOS satellite were obtained to evaluate the feasibility of using remote sensing to monitor the extent of aquatic plant growth in Assabet River impoundments. Three vegetation indices based on light reflectance were used to develop metrics with which the hyperspectral and satellite data were compared. The results of the comparisons confirmed that the high-resolution satellite imagery could differentiate among the common aquatic-plant associations found in the impoundments. The use of satellite imagery could counterbalance emphasis on the subjective judgment of a human observer, and airborne hyperspectral data can provide higher resolution imagery than multispectral satellite data.  In 2007 and 2008, the potential for sediment flux of phosphorus was examined in free-flowing reaches of the river and in the two largest impoundments-Hudson and Ben Smith. These studies were undertaken to determine in situ flux rates prior to the implementation of the Assabet River Total Maximum Daily Load (TMDL) for phosphorus and to compare these rates with those used in the development and evaluation of the TMDL. Water samples collected from a chamber placed on the river bottom were analyzed for total phosphorus and orthophosphorus. Ambient dissolved oxygen concentrations and seasonal temperature differences appeared to affect the rates of sequestration and sediment release of phosphorus. When dissolved oxygen concentrations remained relatively high in the chambers and when the temperature was relatively low, the tendency was for phosphorus concentrations to decrease in the chambers, indicating sediment sequestration of phosphorus; when dissolved oxygen concentrations dropped to near zero and temperatures were warmest, phosphorus concentrations increased in the chambers, indicating phosphorus flux from the sediment. The rates of release and sequestration in the in situ studies were generally comparable with the rates determined in laboratory studies of Assabet River sediment cores for State and Federal agencies. Sediment-core and chamber studies produced substantial sediment fluxes to the water column only under extremely low-DO or anaerobic conditions rarely found in the Assabet River impoundments; thus, sediment is not likely to be a major phosphorus source, especially when compared to the wastewater effluent, which sustains higher ambient concentrations. The regulatory agencies now (2011) have substantial laboratory and field data with which to determine the required 90-percent reduction in phosphorus flux after the completion of upgrades to the wastewater-treatment plants that discharge to the Assabet River.","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/sir20115179","usgsCitation":"Zimmerman, M.J., Qian, Y., and Yong Q., T., 2011, Monitoring to assess progress toward meeting the Assabet River, Massachusetts, phosphorus total maximum daily load - Aquatic macrophyte biomass and sediment-phosphorus flux: U.S. Geological Survey Scientific Investigations Report 2011-5179, x, 77 p., https://doi.org/10.3133/sir20115179.","productDescription":"x, 77 p.","onlineOnly":"Y","temporalStart":"2007-01-01","temporalEnd":"2008-12-31","costCenters":[{"id":376,"text":"Massachusetts Water Science Center","active":true,"usgs":true}],"links":[{"id":111004,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/sir/2011/5179/","linkFileType":{"id":5,"text":"html"}},{"id":116745,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/sir_2011_5179.gif"}],"country":"United States","state":"Massachusetts","otherGeospatial":"Assabet River Basin","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -72,42 ], [ -72,43 ], [ -71,43 ], [ -71,42 ], [ -72,42 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5df6e4b0c8380cd706f0","contributors":{"authors":[{"text":"Zimmerman, Marc J. mzimmerm@usgs.gov","contributorId":3245,"corporation":false,"usgs":true,"family":"Zimmerman","given":"Marc","email":"mzimmerm@usgs.gov","middleInitial":"J.","affiliations":[{"id":376,"text":"Massachusetts Water Science Center","active":true,"usgs":true}],"preferred":true,"id":353984,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Qian, Yu","contributorId":105037,"corporation":false,"usgs":true,"family":"Qian","given":"Yu","email":"","affiliations":[],"preferred":false,"id":353986,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Yong Q., Tian","contributorId":31102,"corporation":false,"usgs":true,"family":"Yong Q.","given":"Tian","email":"","affiliations":[],"preferred":false,"id":353985,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70006171,"text":"fs20113141 - 2011 - U.S. Geological Survey Community for Data Integration-NWIS Web Services Snapshot Tool for ArcGIS","interactions":[],"lastModifiedDate":"2016-08-11T15:17:46","indexId":"fs20113141","displayToPublicDate":"2011-12-06T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":313,"text":"Fact Sheet","code":"FS","onlineIssn":"2327-6932","printIssn":"2327-6916","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2011-3141","title":"U.S. Geological Survey Community for Data Integration-NWIS Web Services Snapshot Tool for ArcGIS","docAbstract":"<p>U.S. Geological Survey (USGS) data resources are so vast that many scientists are unaware of data holdings that may be directly relevant to their research. Data are also difficult to access and large corporate databases, such as the National Water Information System (NWIS) that houses hydrologic data for the Nation, are challenging to use without considerable expertise and investment of time. The USGS Community for Data Integration (CDI) was established in 2009 to address data and information management issues affecting the proficiency of earth science research. A CDI workshop convened in 2009 identified common data integration needs of USGS scientists and targeted high value opportunities that might address these needs by leveraging existing projects in USGS science centers, in-kind contributions, and supplemental funding. To implement this strategy, CDI sponsored a software development project in 2010 to facilitate access and use of NWIS data with ArcGIS, a widely used Geographic Information System. The resulting software product, the NWIS Web Services Snapshot Tool for ArcGIS, is presented here.</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/fs20113141","usgsCitation":"Holl, S., 2011, U.S. Geological Survey Community for Data Integration-NWIS Web Services Snapshot Tool for ArcGIS: U.S. Geological Survey Fact Sheet 2011-3141, 2 p., https://doi.org/10.3133/fs20113141.","productDescription":"2 p.","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":583,"text":"Texas Water Science Center","active":true,"usgs":true}],"links":[{"id":116746,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/fs_2011_3141.gif"},{"id":111006,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/fs/2011/3141/","linkFileType":{"id":5,"text":"html"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bba60e4b08c986b328138","contributors":{"authors":[{"text":"Holl, Sally","contributorId":107416,"corporation":false,"usgs":true,"family":"Holl","given":"Sally","affiliations":[],"preferred":false,"id":353989,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70044156,"text":"70044156 - 2011 - The role of remote sensing observations and models in hydrology: The science of evapotranspiration","interactions":[],"lastModifiedDate":"2025-12-10T17:14:58.661721","indexId":"70044156","displayToPublicDate":"2011-12-05T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1924,"text":"Hydrological Processes","active":true,"publicationSubtype":{"id":10}},"title":"The role of remote sensing observations and models in hydrology: The science of evapotranspiration","docAbstract":"Over 15 years ago, Morton (1994) summarized the state of evapotranspiration (ET) research pessimistically: ‘There have been few significant advances in our knowledge of evaporation on an environmental scale over the past four decades, a state of affairs linked to the current sterility of hydrology and related environmental sciences. Furthermore, almost none of the advances have been used successfully in practice.’ He did not foresee the rapid progress in the\nensuing years. These advances can be attributed largely to three convergent themes: 1) technical innovation; 2) synergy between disciplines; and 3) expressed need. The papers in this special issue address all of these three themes on remote sensing methods for ET estimation.","language":"English","publisher":"Wiley","doi":"10.1002/hyp.8436","usgsCitation":"Nagler, P., 2011, The role of remote sensing observations and models in hydrology: The science of evapotranspiration: Hydrological Processes, v. 25, no. 26, p. 3977-3978, https://doi.org/10.1002/hyp.8436.","productDescription":"2 p.","startPage":"3977","endPage":"3978","numberOfPages":"2","ipdsId":"IP-033236","costCenters":[{"id":568,"text":"Southwest Biological Science Center","active":true,"usgs":true}],"links":[{"id":271484,"rank":2,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":271483,"rank":1,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/hyp.8436"}],"volume":"25","issue":"26","noUsgsAuthors":false,"publicationDate":"2011-12-14","publicationStatus":"PW","scienceBaseUri":"517a506fe4b072c16ef14b69","contributors":{"authors":[{"text":"Nagler, Pamela 0000-0003-0674-103X","orcid":"https://orcid.org/0000-0003-0674-103X","contributorId":8748,"corporation":false,"usgs":true,"family":"Nagler","given":"Pamela","affiliations":[],"preferred":false,"id":474917,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70006138,"text":"sir20115176 - 2011 - Using observed postconstruction peak discharges to evaluate a hydrologic and hydraulic design model, Boneyard Creek, Champaign and Urbana, Illinois","interactions":[],"lastModifiedDate":"2012-03-08T17:16:43","indexId":"sir20115176","displayToPublicDate":"2011-12-02T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":334,"text":"Scientific Investigations Report","code":"SIR","onlineIssn":"2328-0328","printIssn":"2328-031X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2011-5176","title":"Using observed postconstruction peak discharges to evaluate a hydrologic and hydraulic design model, Boneyard Creek, Champaign and Urbana, Illinois","docAbstract":"Boneyard Creek&mdash;which drains an urbanized watershed in the cities of Champaign and Urbana, Illinois, including part of the University of Illinois at Urbana-Champaign (UIUC) campus&mdash;has historically been prone to flooding. Using the Stormwater Management Model (SWMM), a hydrologic and hydraulic model of Boneyard Creek was developed for the design of the projects making up the first phase of a long-term plan for flood control on Boneyard Creek, and the construction of the projects was completed in May 2003. The U.S. Geological Survey, in cooperation with the Cities of Champaign and Urbana and UIUC, installed and operated stream and rain gages in order to obtain data for evaluation of the design-model simulations. In this study, design-model simulations were evaluated by using observed postconstruction precipitation and peak-discharge data.  Between May 2003 and September 2008, five high-flow events on Boneyard Creek satisfied the study criterion. The five events were simulated with the design model by using observed precipitation. The simulations were run with two different values of the parameter controlling the soil moisture at the beginning of the storms and two different ways of spatially distributing the precipitation, making a total of four simulation scenarios. The simulated and observed peak discharges and stages were compared at gaged locations along the Creek. The discharge at one of these locations was deemed to be critical for evaluating the design model. The uncertainty of the measured peak discharge was also estimated at the critical location with a method based on linear regression of the stage and discharge relation, an estimate of the uncertainty of the acoustic Doppler velocity meter measurements, and the uncertainty of the stage measurements.  For four of the five events, the simulated peak discharges lie within the 95-percent confidence interval of the observed peak discharges at the critical location; the fifth was just outside the upper end of this interval. For two of the four simulation scenarios, the simulation results for one event at the critical location were numerically unstable in the vicinity of the discharge peak. For the remaining scenarios, the simulated peak discharges over the five events at the critical location differ from the observed peak discharges (simulated minus observed) by an average of 7.7 and -1.5 percent, respectively. The simulated peak discharges over the four events for which all scenarios have numerically stable results at the critical location differs from the observed peak discharges (simulated minus observed) by an average of -6.8, 4.0, -5.4, and 1.5 percent, for the four scenarios, respectively. Overall, the discharge peaks simulated for this study at the critical location are approximately balanced between overprediction and underprediction and do not indicate significant model bias or inaccuracy. Additional comparisons were made by using peak stages at the critical location and two additional sites and using peak discharges at one additional site. These comparisons showed the same pattern of differences between observed and simulated values across events but varying biases depending on streamgage and measurement type (discharge or stage). Altogether, the results from this study show no clear evidence that the design model is significantly inaccurate or biased and, therefore, no clear evidence that the modeled flood-control projects in Champaign and on the University of Illinois campus have increased flood stages or discharges downstream in Urbana.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/sir20115176","collaboration":"Prepared in cooperation with the City of Champaign, Illinois, the City of Urbana, Illinois, and the University of Illinois at Urbana-Champaign","usgsCitation":"Over, T.M., Soong, D., and Holmes, R.R., 2011, Using observed postconstruction peak discharges to evaluate a hydrologic and hydraulic design model, Boneyard Creek, Champaign and Urbana, Illinois: U.S. Geological Survey Scientific Investigations Report 2011-5176, vi, 37 p., https://doi.org/10.3133/sir20115176.","productDescription":"vi, 37 p.","onlineOnly":"Y","temporalStart":"2003-05-01","temporalEnd":"2008-09-30","costCenters":[{"id":344,"text":"Illinois Water Science Center","active":true,"usgs":true}],"links":[{"id":110983,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/sir/2011/5176/","linkFileType":{"id":5,"text":"html"}},{"id":116683,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/sir_2011_5176.jpg"}],"country":"United States","state":"Illinois","city":"Champaign-urbana","otherGeospatial":"Boneyard Creek Watershed","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -88.26666666666667,40.08416666666667 ], [ -88.26666666666667,40.13333333333333 ], [ -88.18361111111112,40.13333333333333 ], [ -88.18361111111112,40.08416666666667 ], [ -88.26666666666667,40.08416666666667 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a14e4b07f02db602eae","contributors":{"authors":[{"text":"Over, Thomas M. 0000-0001-8280-4368 tmover@usgs.gov","orcid":"https://orcid.org/0000-0001-8280-4368","contributorId":1819,"corporation":false,"usgs":true,"family":"Over","given":"Thomas","email":"tmover@usgs.gov","middleInitial":"M.","affiliations":[{"id":344,"text":"Illinois Water Science Center","active":true,"usgs":true}],"preferred":true,"id":353918,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Soong, David T.","contributorId":87487,"corporation":false,"usgs":true,"family":"Soong","given":"David T.","affiliations":[],"preferred":false,"id":353919,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Holmes, Robert R. Jr. 0000-0002-5060-3999 bholmes@usgs.gov","orcid":"https://orcid.org/0000-0002-5060-3999","contributorId":1624,"corporation":false,"usgs":true,"family":"Holmes","given":"Robert","suffix":"Jr.","email":"bholmes@usgs.gov","middleInitial":"R.","affiliations":[{"id":502,"text":"Office of Surface Water","active":true,"usgs":true}],"preferred":false,"id":353917,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70005466,"text":"70005466 - 2011 - Mineralogy, morphology, and textural relationships in coatings on quartz grains in sediments in a quartz-sand aquifer","interactions":[],"lastModifiedDate":"2020-01-28T14:00:11","indexId":"70005466","displayToPublicDate":"2011-12-02T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2233,"text":"Journal of Contaminant Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Mineralogy, morphology, and textural relationships in coatings on quartz grains in sediments in a quartz-sand aquifer","docAbstract":"Mineralogical studies of coatings on quartz grains and bulk sediments from an aquifer on Western Cape Cod, Massachusetts, USA were carried out using a variety of transmission electron microscopy (TEM) techniques. Previous studies demonstrated that coatings on quartz grains control the adsorption properties of these sediments. Samples for TEM characterization were made by a gentle mechanical grinding method and focused ion beam (FIB) milling. The former method can make abundant electron-transparent coating assemblages for comprehensive and quantitative X-ray analysis and the latter technique protects the coating texture from being destroyed. Characterization of the samples from both a pristine area and an area heavily impacted by wastewater discharge shows similar coating textures and chemical compositions. Major constituents of the coating include Al-substituted goethite and illite/chlorite clays. Goethite is aggregated into well-crystallized domains through oriented attachment resulting in increased porosity. Illite/chlorite clays with various chemical compositions were observed to be mixed with goethite aggregates and aligned sub-parallel to the associated quartz surface. The uniform spatial distribution of wastewater-derived phosphorus throughout the coating from the wastewater-contaminated site suggests that all of the coating constituents, including those adjacent to the quartz surface, are accessible to groundwater solutes. Both TEM characterization and chemical extraction results indicate there is a significantly greater amount of amorphous iron oxide in samples from wastewater discharge area compared to those from the pristine region, which might reflect the impact of redox cycling of iron under the wastewater-discharge area. Coating compositions are consistent with the moderate metal and oxy-metalloid adsorption capacities, low but significant cation exchange capacities, and control of iron(III) solubility by goethite observed in reactive transport experimental and modeling studies conducted at the site.","language":"English","publisher":"Elsevier","doi":"10.1016/j.jconhyd.2011.02.003","usgsCitation":"Zhang, S., Kent, D.B., Elbert, D.C., Shi, Z., Davis, J., and Veblen, D.R., 2011, Mineralogy, morphology, and textural relationships in coatings on quartz grains in sediments in a quartz-sand aquifer: Journal of Contaminant Hydrology, v. 124, no. 1-4, p. 57-67, https://doi.org/10.1016/j.jconhyd.2011.02.003.","productDescription":"11 p.","startPage":"57","endPage":"67","costCenters":[{"id":148,"text":"Branch of Regional Research-Western Region","active":false,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":204234,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Massachusetts","otherGeospatial":"Cape Cod","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -70.77392578125,\n              41.65649719441145\n            ],\n            [\n              -69.85107421874999,\n              41.65649719441145\n            ],\n            [\n              -69.85107421874999,\n              42.08599350447723\n            ],\n            [\n              -70.77392578125,\n              42.08599350447723\n            ],\n            [\n              -70.77392578125,\n              41.65649719441145\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"124","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b05e4b07f02db699dcb","contributors":{"authors":[{"text":"Zhang, Shouliang","contributorId":55952,"corporation":false,"usgs":true,"family":"Zhang","given":"Shouliang","email":"","affiliations":[],"preferred":false,"id":352570,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kent, Douglas B. 0000-0003-3758-8322 dbkent@usgs.gov","orcid":"https://orcid.org/0000-0003-3758-8322","contributorId":1871,"corporation":false,"usgs":true,"family":"Kent","given":"Douglas","email":"dbkent@usgs.gov","middleInitial":"B.","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true}],"preferred":true,"id":352567,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Elbert, David C.","contributorId":22483,"corporation":false,"usgs":true,"family":"Elbert","given":"David","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":352569,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Shi, Zhi","contributorId":8605,"corporation":false,"usgs":true,"family":"Shi","given":"Zhi","email":"","affiliations":[],"preferred":false,"id":352568,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Davis, James A.","contributorId":69289,"corporation":false,"usgs":true,"family":"Davis","given":"James A.","affiliations":[],"preferred":false,"id":352571,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Veblen, David R.","contributorId":86472,"corporation":false,"usgs":true,"family":"Veblen","given":"David","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":352572,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70003669,"text":"70003669 - 2011 - Sources of mercury to San Francisco Bay surface sediment as revealed by mercury stable isotopes","interactions":[],"lastModifiedDate":"2020-01-11T11:38:50","indexId":"70003669","displayToPublicDate":"2011-12-01T17:28:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1759,"text":"Geochimica et Cosmochimica Acta","active":true,"publicationSubtype":{"id":10}},"title":"Sources of mercury to San Francisco Bay surface sediment as revealed by mercury stable isotopes","docAbstract":"Mercury (Hg) concentrations and isotopic compositions were examined in shallow-water surface sediment (0&ndash;2 cm) from San Francisco (SF) Bay to determine the extent to which historic Hg mining contributes to current Hg contamination in SF Bay, and to assess the use of Hg isotopes to trace sources of contamination in estuaries. Inter-tidal and wetland sediment had total Hg (Hg<sub>T</sub>) concentrations ranging from 161 to 1529 ng/g with no simple gradients of spatial variation. In contrast, inter-tidal and wetland sediment displayed a geographic gradient of &delta;<sup>202</sup>Hg values, ranging from -0.30% in the southern-most part of SF Bay (draining the New Almaden Hg District) to -0.99% in the northern-most part of SF Bay near the Sacramento&ndash;San Joaquin River Delta. Similar to SF Bay inter-tidal sediment, surface sediment from the Alviso Slough channel draining into South SF Bay had a &delta;<sup>202</sup>Hg value of -0.29%, while surface sediment from the Cosumnes River and Sacramento&ndash;San Joaquin River Delta draining into north SF Bay had lower average &delta;<sup>202</sup>Hg values of -0.90% and -0.75%, respectively. This isotopic trend suggests that Hg-contaminated sediment from the New Almaden Hg District mixes with Hg-contaminated sediment from a low &delta;<sup>202</sup>Hg source north of SF Bay. Tailings and thermally decomposed ore (calcine) from the New Idria Hg mine in the California Coast Range had average &delta;<sup>202</sup>Hg values of -0.37 and +0.03%, respectively, showing that Hg calcination fractionates Hg isotopes resulting in Hg contamination from Hg(II) mine waste products with higher &delta;<sup>202</sup>Hg values than metallic Hg(0) produced from Hg mines. Thus, there is evidence for at least two distinct isotopic signals for Hg contamination in SF Bay: Hg associated with calcine waste materials at Hg mines in the Coast Range, such as New Almaden and New Idria; and Hg(0) produced from these mines and used in placer gold mines and/or in other industrial processes in the Sierra Nevada region and SF Bay area.","language":"English","publisher":"Elsevier","doi":"10.1016/j.gca.2010.11.012","usgsCitation":"Gehrke, G.E., Blum, J.D., and Marvin-DePasquale, M., 2011, Sources of mercury to San Francisco Bay surface sediment as revealed by mercury stable isotopes: Geochimica et Cosmochimica Acta, v. 75, no. 3, p. 691-705, https://doi.org/10.1016/j.gca.2010.11.012.","productDescription":"15 p.","startPage":"691","endPage":"705","costCenters":[{"id":148,"text":"Branch of Regional Research-Western Region","active":false,"usgs":true},{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":204509,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"San Francisco Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -123.09631347656249,\n              37.391981943533544\n            ],\n            [\n              -121.87683105468749,\n              37.391981943533544\n            ],\n            [\n              -121.87683105468749,\n              38.302869955150044\n            ],\n            [\n              -123.09631347656249,\n              38.302869955150044\n            ],\n            [\n              -123.09631347656249,\n              37.391981943533544\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"75","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9381e4b08c986b31a50c","contributors":{"authors":[{"text":"Gehrke, Gretchen E.","contributorId":19700,"corporation":false,"usgs":true,"family":"Gehrke","given":"Gretchen","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":348256,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Blum, Joel D.","contributorId":83657,"corporation":false,"usgs":true,"family":"Blum","given":"Joel","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":348258,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Marvin-DePasquale, Mark","contributorId":49510,"corporation":false,"usgs":true,"family":"Marvin-DePasquale","given":"Mark","affiliations":[],"preferred":false,"id":348257,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70004693,"text":"70004693 - 2011 - Exchange of Groundwater and Surface-Water Mediated by Permafrost Response to Seasonal and Long Term Air Temperature Variation","interactions":[],"lastModifiedDate":"2012-02-02T00:16:00","indexId":"70004693","displayToPublicDate":"2011-12-01T13:57:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"Exchange of Groundwater and Surface-Water Mediated by Permafrost Response to Seasonal and Long Term Air Temperature Variation","docAbstract":"Permafrost dynamics impact hydrologic cycle processes by promoting or impeding groundwater and surface water exchange. Under seasonal and decadal air temperature variations, permafrost temperature changes control the exchanges between groundwater and surface water. A coupled heat transport and groundwater flow model, SUTRA, was modified to simulate groundwater flow and heat transport in the subsurface containing permafrost. The northern central Tibet Plateau was used as an example of model application. Modeling results show that in a yearly cycle, groundwater flow occurs in the active layer from May to October. Maximum groundwater discharge to the surface lags the maximum subsurface temperature by two months. Under an increasing air temperature scenario of 3?C per 100 years, over the initial 40-year period, the active layer thickness can increase by three-fold. Annual groundwater discharge to the surface can experience a similar three-fold increase in the same period. An implication of these modeling results is that with increased warming there will be more groundwater flow in the active layer and therefore increased groundwater discharge to rivers. However, this finding only holds if sufficient upgradient water is available to replenish the increased discharge. Otherwise, there will be an overall lowering of the water table in the recharge portion of the catchment.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geophysical Research Letters","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"American Geophysical Union","doi":"10.1029/2011GL047911","usgsCitation":"Ge, S., McKenzie, J., Voss, C., and Wu, Q., 2011, Exchange of Groundwater and Surface-Water Mediated by Permafrost Response to Seasonal and Long Term Air Temperature Variation: Geophysical Research Letters, v. 38, no. L14402, 6 p., https://doi.org/10.1029/2011GL047911.","productDescription":"6 p.","costCenters":[{"id":148,"text":"Branch of Regional Research-Western Region","active":false,"usgs":true}],"links":[{"id":474868,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2011gl047911","text":"Publisher Index Page"},{"id":204225,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":112406,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2011GL047911"}],"country":"United States","volume":"38","issue":"L14402","noUsgsAuthors":false,"publicationDate":"2011-07-30","publicationStatus":"PW","scienceBaseUri":"505a0da7e4b0c8380cd5311b","contributors":{"authors":[{"text":"Ge, Shemin","contributorId":37366,"corporation":false,"usgs":true,"family":"Ge","given":"Shemin","affiliations":[],"preferred":false,"id":351161,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McKenzie, Jeffrey","contributorId":37466,"corporation":false,"usgs":true,"family":"McKenzie","given":"Jeffrey","affiliations":[],"preferred":false,"id":351162,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Voss, Clifford","contributorId":63150,"corporation":false,"usgs":true,"family":"Voss","given":"Clifford","affiliations":[],"preferred":false,"id":351163,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wu, Qingbai","contributorId":101798,"corporation":false,"usgs":true,"family":"Wu","given":"Qingbai","email":"","affiliations":[],"preferred":false,"id":351164,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70148168,"text":"70148168 - 2011 - A comparison of avian communities and habitat characteristics in floodplain forests associated with valley plugs and unchannelized streams","interactions":[],"lastModifiedDate":"2017-05-17T09:43:30","indexId":"70148168","displayToPublicDate":"2011-12-01T13:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3301,"text":"River Research and Applications","active":true,"publicationSubtype":{"id":10}},"title":"A comparison of avian communities and habitat characteristics in floodplain forests associated with valley plugs and unchannelized streams","docAbstract":"<p>Channelization of streams associated with floodplain forested wetlands has occurred extensively throughout the world and specifically in the southeastern United States. Channelization of fluvial systems alters the hydrologic and sedimentation processes that sustain these systems. In western Tennessee, channelization and past land-use practices have caused drastic geomorphic and hydrologic changes, resulting in altered habitat conditions that may affect avian communities. The objective of this study was to determine if there were differences in avian communities utilizing floodplain forests along unchannelized streams compared to channelized streams with valley plugs, areas where sediment has completely filled the channel. During point count surveys, 58 bird species were observed at unchannelized sites and 60 species were observed at valley plug sites. Species associated with baldcypress-tupelo (<i>Taxodium-Nyssa</i>) swamps (e.g. Great Egret (<i>Ardea albus</i>) and Black-crowned Night Heron (<i>Nycticorax nycticorax</i>)) and mature hardwood forests with open midstories (e.g. Eastern Wood-Pewee (<i>Contopus virens</i>), Yellow-throated Vireo (<i>Vireo flavifrons</i>), Cerulean Warbler (<i>Dendroica cerulea</i>) and Scarlet Tanager (<i>Piranga olivacea</i>)) were either only found at unchannelized sites or were more abundant at unchannelized sites. Conversely, species associated with open and early successional habitats (e.g. Tree Swallow (<i>Tachycineta bicolor</i>), Northern Mockingbird (<i>Mimus polyglottos</i>) and Blue Grosbeak (<i>Passerina caerulea</i>)) were either only found at valley plug sites or were more abundant at valley plug sites. Results of habitat modelling suggest that the habitat characteristics of floodplain forests at unchannelized sites are more suitable for Neotropical migrant bird species of conservation concern in the region than at valley plug sites. This study, in combination with previous research, demonstrates the ecological impacts of valley plugs span across abiotic and biotic processes and tropic levels.</p>","language":"English","publisher":"Wiley","doi":"10.1002/rra.1429","usgsCitation":"Pierce, A.R., and King, S.L., 2011, A comparison of avian communities and habitat characteristics in floodplain forests associated with valley plugs and unchannelized streams: River Research and Applications, v. 27, no. 10, p. 1315-1324, https://doi.org/10.1002/rra.1429.","productDescription":"10 p.","startPage":"1315","endPage":"1324","onlineOnly":"N","additionalOnlineFiles":"N","ipdsId":"IP-009960","costCenters":[{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true}],"links":[{"id":300788,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"10","publishingServiceCenter":{"id":8,"text":"Raleigh PSC"},"noUsgsAuthors":false,"publicationDate":"2011-11-21","publicationStatus":"PW","scienceBaseUri":"55659931e4b0d9246a9eb60d","contributors":{"authors":[{"text":"Pierce, Aaron R.","contributorId":94421,"corporation":false,"usgs":false,"family":"Pierce","given":"Aaron","email":"","middleInitial":"R.","affiliations":[{"id":33463,"text":"Nicholls State University, Thibodaux, LA","active":true,"usgs":false}],"preferred":false,"id":547613,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"King, Sammy L. 0000-0002-5364-6361 sking@usgs.gov","orcid":"https://orcid.org/0000-0002-5364-6361","contributorId":557,"corporation":false,"usgs":true,"family":"King","given":"Sammy","email":"sking@usgs.gov","middleInitial":"L.","affiliations":[{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true}],"preferred":true,"id":547526,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70005381,"text":"70005381 - 2011 - Spatial scaling of core and dominant forest cover in the Upper Mississippi and Illinois River floodplains, USA","interactions":[],"lastModifiedDate":"2021-05-18T14:37:50.291537","indexId":"70005381","displayToPublicDate":"2011-12-01T11:11:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2602,"text":"Landscape Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Spatial scaling of core and dominant forest cover in the Upper Mississippi and Illinois River floodplains, USA","docAbstract":"<p><span>Different organisms respond to spatial structure in different terms and across different spatial scales. As a consequence, efforts to reverse habitat loss and fragmentation through strategic habitat restoration ought to account for the different habitat density and scale requirements of various taxonomic groups. Here, we estimated the local density of floodplain forest surrounding each of ~20&nbsp;million 10-m forested pixels of the Upper Mississippi and Illinois River floodplains by using moving windows of multiple sizes (1–100&nbsp;ha). We further identified forest pixels that met two local density thresholds: ‘core’ forest pixels were nested in a 100% (unfragmented) forested window and ‘dominant’ forest pixels were those nested in a &gt;60% forested window. Finally, we fit two scaling functions to declines in the proportion of forest cover meeting these criteria with increasing window length for 107 management-relevant focal areas: a power function (i.e. self-similar, fractal-like scaling) and an exponential decay function (fractal dimension depends on scale). The exponential decay function consistently explained more variation in changes to the proportion of forest meeting both the ‘core’ and ‘dominant’ criteria with increasing window length than did the power function, suggesting that elevation, soil type, hydrology, and human land use constrain these forest types to a limited range of scales. To examine these scales, we transformed the decay constants to measures of the distance at which the probability of forest meeting the ‘core’ and ‘dominant’ criteria was cut in half (</span><i>S</i><span>&nbsp;</span><sub>1/2</sub><span>, m).&nbsp;</span><i>S</i><span>&nbsp;</span><sub>1/2</sub><span>&nbsp;for core forest was typically between ~55 and ~95&nbsp;m depending on location along the river, indicating that core forest cover is restricted to extremely fine scales. In contrast, half of all dominant forest cover was lost at scales that were typically between ~525 and 750&nbsp;m, but&nbsp;</span><i>S</i><span>&nbsp;</span><sub>1/2</sub><span>&nbsp;was as long as 1,800&nbsp;m.&nbsp;</span><i>S</i><span>&nbsp;</span><sub>1/2</sub><span>&nbsp;is a simple measure that (1) condenses information derived from multi-scale analyses, (2) allows for comparisons of the amount of forest habitat available to species with different habitat density and scale requirements, and (3) can be used as an index of the spatial continuity of habitat types that do not scale fractally.</span></p>","language":"English","publisher":"Springer","publisherLocation":"Amsterdam, Netherlands","doi":"10.1007/s10980-011-9594-2","usgsCitation":"De Jager, N.R., and Rohweder, J., 2011, Spatial scaling of core and dominant forest cover in the Upper Mississippi and Illinois River floodplains, USA: Landscape Ecology, v. 26, no. 5, p. 697-708, https://doi.org/10.1007/s10980-011-9594-2.","productDescription":"12 p.","startPage":"697","endPage":"708","costCenters":[{"id":606,"text":"Upper Midwest Environmental Sciences Center","active":true,"usgs":true}],"links":[{"id":204405,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Illinois, Iowa, Minnesota, Missouri, Wisconsin","otherGeospatial":"Upper Mississippi and Illinois River floodplains","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -93.955078125,\n              37.89219554724437\n            ],\n            [\n              -87.73681640625,\n              37.89219554724437\n            ],\n            [\n              -87.73681640625,\n              45.413876460821086\n            ],\n            [\n              -93.955078125,\n              45.413876460821086\n            ],\n            [\n              -93.955078125,\n              37.89219554724437\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"26","issue":"5","noUsgsAuthors":false,"publicationDate":"2011-03-20","publicationStatus":"PW","scienceBaseUri":"505b94a7e4b08c986b31abd1","contributors":{"authors":[{"text":"De Jager, Nathan R. 0000-0002-6649-4125","orcid":"https://orcid.org/0000-0002-6649-4125","contributorId":104616,"corporation":false,"usgs":true,"family":"De Jager","given":"Nathan","email":"","middleInitial":"R.","affiliations":[{"id":606,"text":"Upper Midwest Environmental Sciences Center","active":true,"usgs":true}],"preferred":false,"id":352388,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rohweder, Jason J.","contributorId":25629,"corporation":false,"usgs":true,"family":"Rohweder","given":"Jason J.","affiliations":[],"preferred":false,"id":352387,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70004869,"text":"70004869 - 2011 - Spatial patterns of mercury in macroinvertebrates and fishes from streams of contrasting forested landscapes in the eastern United States","interactions":[],"lastModifiedDate":"2020-01-14T09:56:07","indexId":"70004869","displayToPublicDate":"2011-12-01T10:33:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1479,"text":"Ecotoxicology","active":true,"publicationSubtype":{"id":10}},"title":"Spatial patterns of mercury in macroinvertebrates and fishes from streams of contrasting forested landscapes in the eastern United States","docAbstract":"Controls on mercury bioaccumulation in lotic ecosystems are not well understood. During 2007&ndash;2009, we studied mercury and stable isotope spatial patterns of macroinvertebrates and fishes from two medium-sized (<80 km<sup>2</sup>) forested basins in contrasting settings. Samples were collected seasonally from multiple sites across the Fishing Brook basin (FBNY), in New York's Adirondack Mountains, and the McTier Creek basin (MCSC), in South Carolina's Coastal Plain. Mean methylmercury (MeHg) concentrations within macroinvertebrate feeding groups, and mean total mercury (THg) concentrations within most fish feeding groups were similar between the two regions. However, mean THg concentrations in game fish and forage fish, overall, were much lower in FBNY (1300 and 590 ng/g dw, respectively) than in MCSC (2300 and 780 ng/g dw, respectively), due to lower trophic positions of these groups from FBNY (means 3.3 and 2.7, respectively) than MCSC (means 3.7 and 3.3, respectively). Much larger spatial variation in topography and water chemistry across FBNY contributed to greater spatial variation in biotic Hg and positive correlations with dissolved MeHg and organic carbon in streamwater. Hydrologic transport distance (HTD) was negatively correlated with biotic Hg across FBNY, and was a better predictor than wetland density. The small range of landscape conditions across MCSC resulted in no consistent spatial patterns, and no discernable correspondence with local-scale environmental factors. This study demonstrates the importance of local-scale environmental factors to mercury bioaccumulation in topographically heterogeneous landscapes, and provides evidence that food-chain length can be an important predictor of broad-scale differences in Hg bioaccumulation among streams.","language":"English","publisher":"Springer","doi":"10.1007/s10646-011-0719-9","usgsCitation":"Riva-Murray, K., Chasar, L.C., Bradley, P.M., Burns, D.A., Brigham, M.E., Smith, M.J., and Abrahamsen, T.A., 2011, Spatial patterns of mercury in macroinvertebrates and fishes from streams of contrasting forested landscapes in the eastern United States: Ecotoxicology, v. 20, no. 7, p. 1530-1542, https://doi.org/10.1007/s10646-011-0719-9.","productDescription":"13 p.","startPage":"1530","endPage":"1542","temporalStart":"2007-01-01","temporalEnd":"2009-12-31","costCenters":[{"id":474,"text":"New York Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":474872,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1007/s10646-011-0719-9","text":"Publisher Index Page"},{"id":204286,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"New York, South 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,{"id":70043371,"text":"70043371 - 2011 - Quantifying the hydrological responses to climate change in an intact forested small watershed in southern China","interactions":[],"lastModifiedDate":"2013-07-23T10:37:55","indexId":"70043371","displayToPublicDate":"2011-12-01T10:29:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1837,"text":"Global Change Biology","active":true,"publicationSubtype":{"id":10}},"title":"Quantifying the hydrological responses to climate change in an intact forested small watershed in southern China","docAbstract":"Responses of hydrological processes to climate change are key components in the Intergovernmental Panel for Climate Change (IPCC) assessment. Understanding these responses is critical for developing appropriate mitigation and adaptation strategies for sustainable water resources management and protection of public safety. However, these responses are not well understood and little long-term evidence exists. Herein, we show how climate change, specifically increased air temperature and storm intensity, can affect soil moisture dynamics and hydrological variables based on both long-term observation and model simulations using the Soil and Water Assessment Tool (SWAT) in an intact forested watershed (the Dinghushan Biosphere Reserve) in Southern China. Our results show that, although total annual precipitation changed little from 1950 to 2009, soil moisture decreased significantly. A significant decline was also found in the monthly 7-day low flow from 2000 to 2009. However, the maximum daily streamflow in the wet season and unconfined groundwater tables have significantly increased during the same 10-year period. The significant decreasing trends on soil moisture and low flow variables suggest that the study watershed is moving towards drought-like condition. Our analysis indicates that the intensification of rainfall storms and the increasing number of annual no-rain days were responsible for the increasing chance of both droughts and floods. We conclude that climate change has indeed induced more extreme hydrological events (e.g. droughts and floods) in this watershed and perhaps other areas of Southern China. This study also demonstrated usefulness of our research methodology and its possible applications on quantifying the impacts of climate change on hydrology in any other watersheds where long-term data are available and human disturbance is negligible.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Global Change Biology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Wiley","doi":"10.1111/j.1365-2486.2011.02499.x","usgsCitation":"Zhou, G., Wei, X., Wu, Y., Liu, S., Huang, Y., Yan, J., Zhang, D., Zhang, Q., Liu, J., Meng, Z., Wang, C., Chu, G., Liu, S., Tang, X., and Liu, X., 2011, Quantifying the hydrological responses to climate change in an intact forested small watershed in southern China: Global Change Biology, v. 17, no. 12, p. 3736-3746, https://doi.org/10.1111/j.1365-2486.2011.02499.x.","productDescription":"11 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,{"id":70003339,"text":"70003339 - 2011 - Spatial and seasonal variability of dissolved methylmercury in two stream basins in the Eastern United States","interactions":[],"lastModifiedDate":"2020-01-28T08:37:43","indexId":"70003339","displayToPublicDate":"2011-12-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Spatial and seasonal variability of dissolved methylmercury in two stream basins in the Eastern United States","docAbstract":"We assessed methylmercury (MeHg) concentrations across multiple ecological scales in the Edisto (South Carolina) and Upper Hudson (New York) River basins. Out-of-channel wetland/floodplain environments were primary sources of filtered MeHg (F-MeHg) to the stream habitat in both systems. Shallow, open-water areas in both basins exhibited low F-MeHg concentrations and decreasing F-MeHg mass flux. Downstream increases in out-of-channel wetlands/floodplains and the absence of impoundments result in high MeHg throughout the Edisto. Despite substantial wetlands coverage and elevated F-MeHg concentrations at the headwater margins, numerous impoundments on primary stream channels favor spatial variability and lower F-MeHg concentrations in the Upper Hudson. The results indicated that, even in geographically, climatically, and ecologically diverse streams, production in wetland/floodplain areas, hydrologic transport to the stream aquatic environment, and conservative/nonconservative attenuation processes in open water areas are fundamental controls on dissolved MeHg concentrations and, by extension, MeHg availability for potential biotic uptake.","language":"English","publisher":"ACS Publications","doi":"10.1021/es103923j","usgsCitation":"Bradley, P.M., Burns, D.A., Riva-Murray, K., Brigham, M.E., Button, D.T., Chasar, L.C., Marvin-DiPasquale, M., Lowery, M.A., and Journey, C.A., 2011, Spatial and seasonal variability of dissolved methylmercury in two stream basins in the Eastern United States: Environmental Science & Technology, v. 45, no. 6, p. 2048-2055, https://doi.org/10.1021/es103923j.","productDescription":"8 p.","startPage":"2048","endPage":"2055","numberOfPages":"8","costCenters":[{"id":559,"text":"South Carolina Water Science 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,{"id":70004692,"text":"70004692 - 2011 - Silver bioaccumulation dynamics in a freshwater invertebrate after aqueous and dietary exposures to nanosized and ionic Ag","interactions":[],"lastModifiedDate":"2020-01-21T10:56:36","indexId":"70004692","displayToPublicDate":"2011-12-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Silver bioaccumulation dynamics in a freshwater invertebrate after aqueous and dietary exposures to nanosized and ionic Ag","docAbstract":"We compared silver (Ag) bioavailability and toxicity to a freshwater gastropod after exposure to ionic silver (Ag<sup>+</sup>) and to Ag nanoparticles (Ag NPs) capped with citrate or with humic acid. Silver form, exposure route, and capping agent influence Ag bioaccumulation dynamics in <i>Lymnaea stagnalis</i>. Snails efficiently accumulated Ag from all forms after either aqueous or dietary exposure. For both exposure routes, uptake rates were faster for Ag<sup>+</sup> than for Ag NPs. Snails efficiently assimilated Ag from Ag NPs mixed with diatoms (assimilation efficiency (AE) ranged from 49 to 58%) and from diatoms pre-exposed to Ag<sup>+</sup> (AE of 73%). In the diet, Ag NPs damaged digestion. Snails ate less and inefficiently processed the ingested food, which adversely impacted their growth. Loss rates of Ag were faster after waterborne exposure to Ag NPs than after exposure to dissolved Ag<sup>+</sup>. Once Ag was taken up from diet, whether from Ag<sup>+</sup> or Ag NPs, Ag was lost extremely slowly. Large Ag body concentrations are thus expected in <i>L. stagnalis</i> after dietborne exposures, especially to citrate-capped Ag NPs. Ingestion of Ag associated with particulate materials appears as the most important vector of uptake. Nanosilver exposure from food might trigger important environmental risks.","language":"English","publisher":"ACS Publications","doi":"10.1021/es200880c","usgsCitation":"le Croteau, M., Misra, S.K., Luoma, S.N., and Valsami-Jones, E., 2011, Silver bioaccumulation dynamics in a freshwater invertebrate after aqueous and dietary exposures to nanosized and ionic Ag: Environmental Science & Technology, v. 45, no. 15, p. 6600-6607, https://doi.org/10.1021/es200880c.","productDescription":"8 p.","startPage":"6600","endPage":"6607","costCenters":[{"id":148,"text":"Branch of Regional Research-Western Region","active":false,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":204323,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"15","noUsgsAuthors":false,"publicationDate":"2011-07-06","publicationStatus":"PW","scienceBaseUri":"505b8f4ae4b08c986b318e43","contributors":{"authors":[{"text":"le Croteau, Marie-Noe","contributorId":100994,"corporation":false,"usgs":true,"family":"le Croteau","given":"Marie-Noe","email":"","affiliations":[],"preferred":false,"id":351160,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Misra, Superb K.","contributorId":91231,"corporation":false,"usgs":true,"family":"Misra","given":"Superb","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":351159,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Luoma, Samuel N. 0000-0001-5443-5091 snluoma@usgs.gov","orcid":"https://orcid.org/0000-0001-5443-5091","contributorId":2287,"corporation":false,"usgs":true,"family":"Luoma","given":"Samuel","email":"snluoma@usgs.gov","middleInitial":"N.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":351157,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Valsami-Jones, Eugenia","contributorId":26057,"corporation":false,"usgs":true,"family":"Valsami-Jones","given":"Eugenia","email":"","affiliations":[],"preferred":false,"id":351158,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70193241,"text":"70193241 - 2011 - Vulnerability of high-latitude soil organic carbon in North America to disturbance","interactions":[],"lastModifiedDate":"2017-10-31T16:36:14","indexId":"70193241","displayToPublicDate":"2011-12-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2319,"text":"Journal of Geophysical Research G: Biogeosciences","active":true,"publicationSubtype":{"id":10}},"title":"Vulnerability of high-latitude soil organic carbon in North America to disturbance","docAbstract":"<p><span>This synthesis addresses the vulnerability of the North American high-latitude soil organic carbon (SOC) pool to climate change. Disturbances caused by climate warming in arctic, subarctic, and boreal environments can result in significant redistribution of C among major reservoirs with potential global impacts. We divide the current northern high-latitude SOC pools into (1) near-surface soils where SOC is affected by seasonal freeze-thaw processes and changes in moisture status, and (2) deeper permafrost and peatland strata down to several tens of meters depth where SOC is usually not affected by short-term changes. We address key factors (permafrost, vegetation, hydrology, paleoenvironmental history) and processes (C input, storage, decomposition, and output) responsible for the formation of the large high-latitude SOC pool in North America and highlight how climate-related disturbances could alter this pool's character and size. Press disturbances of relatively slow but persistent nature such as top-down thawing of permafrost, and changes in hydrology, microbiological communities, pedological processes, and vegetation types, as well as pulse disturbances of relatively rapid and local nature such as wildfires and thermokarst, could substantially impact SOC stocks. Ongoing climate warming in the North American high-latitude region could result in crossing environmental thresholds, thereby accelerating press disturbances and increasingly triggering pulse disturbances and eventually affecting the C source/sink net character of northern high-latitude soils. Finally, we assess postdisturbance feedbacks, models, and predictions for the northern high-latitude SOC pool, and discuss data and research gaps to be addressed by future research.</span></p>","language":"English","publisher":"AGU","doi":"10.1029/2010JG001507","usgsCitation":"Grosse, G., Harden, J.W., Turetsky, M., McGuire, A., Camill, P., Tarnocai, C., Frolking, S., Schuur, E.A., Jorgenson, T., Marchenko, S., Romanovsky, V., Wickland, K.P., French, N., Waldrop, M.P., Bourgeau-Chavez, L., and Striegl, R.G., 2011, Vulnerability of high-latitude soil organic carbon in North America to disturbance: Journal of Geophysical Research G: Biogeosciences, v. 116, no. 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