Base flow recession information is helpful for regional estimation of low‐flow characteristics. However, analyses that exploit such information generally require a continuous record of streamflow at the estimation site to characterize base flow recession. Here we propose a simple method for characterizing base flow recession at low‐flow partial record stream gauges (i.e., sites with very few streamflow measurements under low‐streamflow conditions), and we use that characterization as the basis for a practical new approach to low‐flow regression. In a case study the introduction of a base flow recession time constant, estimated from a single pair of strategically timed streamflow measurements, approximately halves the root‐mean‐square estimation error relative to that of a conventional drainage area regression. Additional streamflow measurements can be used to reduce the error further.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2006WR005293","usgsCitation":"Eng, K., and Milly, P., 2007, Relating low‐flow characteristics to the base flow recession time constant at partial record stream gauges: Water Resources Research, v. 43, no. 1, Article W01201; 8 p., https://doi.org/10.1029/2006WR005293.","productDescription":"Article W01201; 8 p.","costCenters":[],"links":[{"id":477172,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006wr005293","text":"Publisher Index Page"},{"id":242774,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-05","publicationStatus":"PW","scienceBaseUri":"50e4a626e4b0e8fec6cdc0e3","contributors":{"authors":[{"text":"Eng, Ken 0000-0001-6838-5849 keng@usgs.gov","orcid":"https://orcid.org/0000-0001-6838-5849","contributorId":3580,"corporation":false,"usgs":true,"family":"Eng","given":"Ken","email":"keng@usgs.gov","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true},{"id":37778,"text":"WMA - Integrated Modeling and Prediction Division","active":true,"usgs":true}],"preferred":true,"id":435031,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Milly, P. C. D.","contributorId":100489,"corporation":false,"usgs":true,"family":"Milly","given":"P. C. D.","affiliations":[],"preferred":false,"id":435032,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031628,"text":"70031628 - 2007 - Validation of streamflow measurements made with acoustic doppler current profilers","interactions":[],"lastModifiedDate":"2012-03-12T17:21:10","indexId":"70031628","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2338,"text":"Journal of Hydraulic Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Validation of streamflow measurements made with acoustic doppler current profilers","docAbstract":"The U.S. Geological Survey and other international agencies have collaborated to conduct laboratory and field validations of acoustic Doppler current profiler (ADCP) measurements of streamflow. Laboratory validations made in a large towing basin show that the mean differences between tow cart velocity and ADCP bottom-track and water-track velocities were -0.51 and -1.10%, respectively. Field validations of commercially available ADCPs were conducted by comparing streamflow measurements made with ADCPs to reference streamflow measurements obtained from concurrent mechanical current-meter measurements, stable rating curves, salt-dilution measurements, or acoustic velocity meters. Data from 1,032 transects, comprising 100 discharge measurements, were analyzed from 22 sites in the United States, Canada, Sweden, and The Netherlands. Results of these analyses show that broadband ADCP streamflow measurements are unbiased when compared to the reference discharges regardless of the water mode used for making the measurement. Measurement duration is more important than the number of transects for reducing the uncertainty of the ADCP streamflow measurement. ?? 2007 ASCE.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydraulic Engineering","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1061/(ASCE)0733-9429(2007)133:12(1421)","issn":"07339429","usgsCitation":"Oberg, K., and Mueller, D.S., 2007, Validation of streamflow measurements made with acoustic doppler current profilers: Journal of Hydraulic Engineering, v. 133, no. 12, p. 1421-1432, https://doi.org/10.1061/(ASCE)0733-9429(2007)133:12(1421).","startPage":"1421","endPage":"1432","numberOfPages":"12","costCenters":[],"links":[{"id":240042,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212543,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1061/(ASCE)0733-9429(2007)133:12(1421)"}],"volume":"133","issue":"12","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc102e4b08c986b32a407","contributors":{"authors":[{"text":"Oberg, K.","contributorId":60376,"corporation":false,"usgs":true,"family":"Oberg","given":"K.","affiliations":[],"preferred":false,"id":432418,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mueller, D. S.","contributorId":51338,"corporation":false,"usgs":true,"family":"Mueller","given":"D.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":432417,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031660,"text":"70031660 - 2007 - Seasonal variation in nutrient retention during inundation of a short-hydroperiod floodplain","interactions":[],"lastModifiedDate":"2012-03-12T17:21:11","indexId":"70031660","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Seasonal variation in nutrient retention during inundation of a short-hydroperiod floodplain","docAbstract":"Floodplains are generally considered to be important locations for nutrient retention or inorganic-to-organic nutrient conversions in riverine ecosystems. However, little is known about nutrient processing in short-hydroperiod floodplains or seasonal variation in floodplain nutrient retention. Therefore, we quantified the net uptake, release or transformation of nitrogen (N), phosphorus (P) and suspended sediment species during brief periods (1-2 days) of overbank flooding through a 250-m floodplain flowpath on the fourth-order Mattawoman Creek, Maryland U.S.A. Sampling occurred during a winter, two spring and a summer flood in this largely forested watershed with low nutrient and sediment loading. Concentrations of NO3- increased significantly in surface water flowing over the floodplain in three of the four floods, suggesting the floodplain was a source of NO3-. The upper portion of the floodplain flowpath consistently exported NH4+, most likely due to the hyporheic: flushing of floodplain soil NH4+, which was then likely nitrified to NO3- in floodwaters. The floodplain was a sink for particulate organic P (POP) during two floods and particulate organic N and inorganic suspended sediment (ISS) during one flood. Large releases of all dissolved inorganic N and P species occurred following a snowmelt and subsequent cold winter flood. Although there was little consistency in most patterns of nutrient processing among the different floods, this floodplain, characterized by brief inundation, low residence time and low nutrient loading, behaved oppositely from the conceptual model for most floodplains in that it generally exported inorganic nutrients and imported organic nutrients.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"River Research and Applications","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/rra.1035","issn":"15351459","usgsCitation":"Noe, G., and Hupp, C., 2007, Seasonal variation in nutrient retention during inundation of a short-hydroperiod floodplain: River Research and Applications, v. 23, no. 10, p. 1088-1101, https://doi.org/10.1002/rra.1035.","startPage":"1088","endPage":"1101","numberOfPages":"14","costCenters":[],"links":[{"id":212483,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/rra.1035"},{"id":239974,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"10","noUsgsAuthors":false,"publicationDate":"2007-07-27","publicationStatus":"PW","scienceBaseUri":"505b88e9e4b08c986b316c27","contributors":{"authors":[{"text":"Noe, G.B.","contributorId":66464,"corporation":false,"usgs":true,"family":"Noe","given":"G.B.","email":"","affiliations":[],"preferred":false,"id":432563,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hupp, C.R. 0000-0003-1853-9197","orcid":"https://orcid.org/0000-0003-1853-9197","contributorId":78775,"corporation":false,"usgs":true,"family":"Hupp","given":"C.R.","affiliations":[],"preferred":false,"id":432564,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031671,"text":"70031671 - 2007 - Cross-shelf transport of pink shrimp larvae: Interactions of tidal currents, larval vertical migrations and internal tides","interactions":[],"lastModifiedDate":"2016-03-30T13:29:29","indexId":"70031671","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2663,"text":"Marine Ecology Progress Series","active":true,"publicationSubtype":{"id":10}},"title":"Cross-shelf transport of pink shrimp larvae: Interactions of tidal currents, larval vertical migrations and internal tides","docAbstract":"Transport and behavior of pink shrimp Farfantepenaeus duorarum larvae were investigated on the southwestern Florida (SWF) shelf of the Gulf of Mexico between the Dry Tortugas spawning grounds and Florida Bay nursery grounds. Stratified plankton samples and hydrographic data were collected at 2 h intervals at 3 stations located on a cross-shelf transect. At the Marquesas station, midway between Dry Tortugas and Florida Bay, internal tides were recognized by anomalously cool water, a shallow thermocline with strong density gradients, strong current shear, and a high concentration of pink shrimp larvae at the shallow thermocline. Low Richardson numbers occurred at the pycnocline depth, indicating vertical shear instability and possible turbulent transport from the lower to the upper layer where myses and postlarvae were concentrated. Analysis of vertically stratified plankton suggested that larvae perform vertical migrations and the specific behavior changes ontogenetically; protozoeae were found deeper than myses, and myses deeper than postlarvae. Relative concentrations of protozoea in the upper, middle and bottom layers were consistent with a diel vertical migration, whereas that of postlarvae and myses were consistent with the semidiurnal tides in phase with the flood tide. Postlarvae, the shallowest dwellers that migrate with a semidiurnal periodicity, experienced the largest net onshore flux and larval concentrations were highly correlated with the cross-shelf current. These results provide the first evidence of an onshore tidal transport (a type of selective tidal stream transport, STST), in decapod larvae migrating in continental shelf waters offshore, ca. 100 km from the coast and at a depth of 20 m, while approaching the coastal nursery grounds. Longer time series would be necessary to establish whether internal tides play any role in the larval onshore transport of this species and determine if the STST is the dominant onshore transport mechanism.
","language":"English","publisher":"Inter-Research","publisherLocation":"Oldendorf/Luhe, Germany","doi":"10.3354/meps06916","issn":"01718630","usgsCitation":"Criales, M.M., Browder, J.A., Mooers, C., Robblee, M., Cardenas, H., and Jackson, T.L., 2007, Cross-shelf transport of pink shrimp larvae: Interactions of tidal currents, larval vertical migrations and internal tides: Marine Ecology Progress Series, v. 345, p. 167-184, https://doi.org/10.3354/meps06916.","productDescription":"18 p.","startPage":"167","endPage":"184","numberOfPages":"18","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":477140,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3354/meps06916","text":"Publisher Index Page"},{"id":239637,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212187,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3354/meps06916"}],"country":"United States","state":"Florida","otherGeospatial":"Dry Tortugas, Florida Bay","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -79.91455078125,\n 25.94816628853973\n ],\n [\n -79.9200439453125,\n 25.54244147012483\n ],\n [\n -80.2166748046875,\n 25.04081549894912\n ],\n [\n -80.8648681640625,\n 24.56211235799689\n ],\n [\n -81.5789794921875,\n 24.412140070651528\n ],\n [\n -82.6336669921875,\n 24.382124181118236\n ],\n [\n -83.07861328125,\n 24.45215015618098\n ],\n [\n -83.1060791015625,\n 24.696934226366672\n ],\n [\n -82.5787353515625,\n 24.806681353851964\n ],\n [\n -81.3262939453125,\n 24.926294766395593\n ],\n [\n -80.760498046875,\n 25.224820176765036\n ],\n [\n -80.4364013671875,\n 25.606855993715016\n ],\n [\n -80.343017578125,\n 25.849336891707605\n ],\n [\n -80.2056884765625,\n 25.93828707492375\n ],\n [\n -80.04638671875,\n 25.96792222903405\n ],\n [\n -79.91455078125,\n 25.94816628853973\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"345","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fcc5e4b0c8380cd4e41a","contributors":{"authors":[{"text":"Criales, Maria M.","contributorId":69330,"corporation":false,"usgs":false,"family":"Criales","given":"Maria","email":"","middleInitial":"M.","affiliations":[{"id":12565,"text":"Rosenstiel School of Atomospheric Science, University of Miami","active":true,"usgs":false}],"preferred":false,"id":432605,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Browder, Joan A.","contributorId":7439,"corporation":false,"usgs":true,"family":"Browder","given":"Joan","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":432601,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mooers, C.N.K.","contributorId":13762,"corporation":false,"usgs":true,"family":"Mooers","given":"C.N.K.","email":"","affiliations":[],"preferred":false,"id":432603,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Robblee, M. B.","contributorId":23879,"corporation":false,"usgs":true,"family":"Robblee","given":"M. B.","affiliations":[],"preferred":false,"id":432604,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Cardenas, H.","contributorId":11411,"corporation":false,"usgs":true,"family":"Cardenas","given":"H.","email":"","affiliations":[],"preferred":false,"id":432602,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Jackson, Thomas L.","contributorId":93667,"corporation":false,"usgs":true,"family":"Jackson","given":"Thomas","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":432606,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70031686,"text":"70031686 - 2007 - Geologic characteristics of the central stretch of the Ticona Channel, north-central Illinois","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70031686","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1541,"text":"Environmental Geosciences","active":true,"publicationSubtype":{"id":10}},"title":"Geologic characteristics of the central stretch of the Ticona Channel, north-central Illinois","docAbstract":"The Ticona Channel is located in north-central Illinois and occurs in Grundy, LaSalle, and Putnam counties. It is a buried bedrock valley that served as the principal paleodrainage system in north-central Illinois during the Illinoian and pre-Illinoian. This study focused on the part of the Ticona Channel within the Leonore 7.5??? Quadrangle. The geometry and stratigraphy of sediments that fill the Ticona Channel were investigated using high-resolution, shallow seismic reflection profiling, traditional field geologic mapping techniques, borehole data, and water-well-log data. The valley is about 2 km (1 mi) wide and approximately 60 m (200 ft) deep. The U-shape channel is straight, trends east-west, and has only one mappable tributary. The valley is carved into the Pennsylvanian Carbondale Formation in the eastern part of the study area; it has incised into the Ordovician Prairie du Chien Group in the west. At its base, the Ticona Channel is filled with the Pearl Formation, which is coarse-grained sand and gravel that was deposited during the Illinoian glaciation. The Pearl Formation is overlain by Illinoian till of the Glasford Formation and is capped by Wedron Group sediments from the Wisconsinan stage. Copyright ?? 2007. The American Association of Petroleum Geologists/Division of Environmental Geosciences. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Geosciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1306/eg.05030606002","issn":"10759565","usgsCitation":"Willems, B., Malone, D., and Pugin, A., 2007, Geologic characteristics of the central stretch of the Ticona Channel, north-central Illinois: Environmental Geosciences, v. 14, no. 3, p. 123-136, https://doi.org/10.1306/eg.05030606002.","startPage":"123","endPage":"136","numberOfPages":"14","costCenters":[],"links":[{"id":212363,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1306/eg.05030606002"},{"id":239836,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"14","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1935e4b0c8380cd558e9","contributors":{"authors":[{"text":"Willems, B.A.","contributorId":78208,"corporation":false,"usgs":true,"family":"Willems","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":432693,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Malone, D.H.","contributorId":92124,"corporation":false,"usgs":true,"family":"Malone","given":"D.H.","email":"","affiliations":[],"preferred":false,"id":432694,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pugin, A.","contributorId":10953,"corporation":false,"usgs":true,"family":"Pugin","given":"A.","affiliations":[],"preferred":false,"id":432692,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70033321,"text":"70033321 - 2007 - Trends in the occurrence of MTBE in drinking water in the Northeast United States","interactions":[],"lastModifiedDate":"2012-03-12T17:21:20","indexId":"70033321","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Trends in the occurrence of MTBE in drinking water in the Northeast United States","docAbstract":"Public water systems in Connecticut, Maine, Maryland, New Hampshire, New Jersey, and Rhode Island sampled treated drinking water from 1993-2006 and analyzed the samples for MTBE. The US Geological Survey examined trends in the occurrence of MTBE in drinking water derived from ground water in these States for two near-decadal time steps; 1993-1999 and 2000-2006. MTBE was detected in 14% of drinking water samples collected in all States from 1993-1999 and in 19% of drinking water samples collected from the same systems from 2000-2006 and this difference was statistically significant. Trends in the occurrence of MTBE in each State by individual year indicated significant positive trends in Maryland and New Hampshire. Significant, increasing trends in MTBE concentrations were observed in Maryland and Rhode Island by individual year. This is an abstract of a paper presented at the 2007 Petroleum Hydrocarbons and Organic Chemicals in Ground Water: Prevention, Assessment and Remediation Conference (Houston, TX 11/5-6/2007).","largerWorkTitle":"Ground Water Management - Petroleum Hydrocarbons and Organic Chemicals in Ground Water: Prevention, Assessment, and Remediation Conf","conferenceTitle":"Petroleum Hydrocarbons and Organic Chemicals in Ground Water: Prevention, Assessment and Remediation Conferen","conferenceDate":"5 November 2007 through 6 January 2017","conferenceLocation":"Houston, TX","language":"English","issn":"10479","isbn":"9781605604053","usgsCitation":"Moran, M., 2007, Trends in the occurrence of MTBE in drinking water in the Northeast United States, in Ground Water Management - Petroleum Hydrocarbons and Organic Chemicals in Ground Water: Prevention, Assessment, and Remediation Conf, Houston, TX, 5 November 2007 through 6 January 2017.","startPage":"147","costCenters":[],"links":[{"id":241239,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb813e4b08c986b32766f","contributors":{"authors":[{"text":"Moran, M.J.","contributorId":7862,"corporation":false,"usgs":true,"family":"Moran","given":"M.J.","email":"","affiliations":[],"preferred":false,"id":440323,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70033316,"text":"70033316 - 2007 - Effects of capillarity and microtopography on wetland specific yield","interactions":[],"lastModifiedDate":"2020-09-10T17:52:41.800191","indexId":"70033316","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3750,"text":"Wetlands","onlineIssn":"1943-6246","printIssn":"0277-5212","active":true,"publicationSubtype":{"id":10}},"title":"Effects of capillarity and microtopography on wetland specific yield","docAbstract":"Hydrologic models aid in describing water flows and levels in wetlands. Frequently, these models use a specific yield conceptualization to relate water flows to water level changes. Traditionally, a simple conceptualization of specific yield is used, composed of two constant values for above- and below-surface water levels and neglecting the effects of soil capillarity and land surface microtopography. The effects of capillarity and microtopography on specific yield were evaluated at three wetland sites in the Florida Everglades. The effect of capillarity on specific yield was incorporated based on the fillable pore space within a soil moisture profile at hydrostatic equilibrium with the water table. The effect of microtopography was based on areal averaging of topographically varying values of specific yield. The results indicate that a more physically-based conceptualization of specific yield incorporating capillary and microtopographic considerations can be substantially different from the traditional two-part conceptualization, and from simpler conceptualizations incorporating only capillarity or only microtopography. For the sites considered, traditional estimates of specific yield could underor over-estimate the more physically based estimates by a factor of two or more. The results suggest that consideration of both capillarity and microtopography is important to the formulation of specific yield in physically based hydrologic models of wetlands.
","language":"English","publisher":"Springer","doi":"10.1672/0277-5212(2007)27[693:EOCAMO]2.0.CO;2","usgsCitation":"Sumner, D.M., 2007, Effects of capillarity and microtopography on wetland specific yield: Wetlands, v. 27, no. 3, p. 693-701, https://doi.org/10.1672/0277-5212(2007)27[693:EOCAMO]2.0.CO;2.","productDescription":"9 p.","startPage":"693","endPage":"701","numberOfPages":"9","costCenters":[],"links":[{"id":241169,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a06a2e4b0c8380cd51345","contributors":{"authors":[{"text":"Sumner, D. M.","contributorId":100827,"corporation":false,"usgs":true,"family":"Sumner","given":"D.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":440306,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70031687,"text":"70031687 - 2007 - Nutrient (N, P) loads and yields at multiple scales and subbasin types in the Yukon River basin, Alaska","interactions":[],"lastModifiedDate":"2018-01-30T19:37:24","indexId":"70031687","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Nutrient (N, P) loads and yields at multiple scales and subbasin types in the Yukon River basin, Alaska","docAbstract":"Loads and yields of dissolved and particulate nitrogen (N) and phosphorus (P) were measured and modeled at three locations on the Yukon River (YR) and on the Tanana and Porcupine Rivers in Alaska during 2001-2005. Total export of N and P upstream of Yukon Delta averaged 120 Gg N a-1 and 56 Gg P a-1, respectively, with 43.5% of total N (TN) as dissolved organic N, and 98% of total P (TP) as particulate phosphorus. Approximately half of the annual export of TN and TP occurred during spring. Hydrologic yields ofTN (5.6-13.3 mmol N m-2 a-1) and TP (0.8-9.0 mmol P m-2 a-1) were least in the Porcupine basin and greatest in the Tanana basin and were proportional to water yield. Comparison of current and historical dissolved organic matter (DOM) export from the basin indicates decreased DON export with respect to total water discharge during summer and autumn in recent decades. Any possible climate-related change in annual water discharge will result in proportional changes in N and P export.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research G: Biogeosciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2006JG000366","issn":"01480227","usgsCitation":"Dornblaser, M., and Striegl, R.G., 2007, Nutrient (N, P) loads and yields at multiple scales and subbasin types in the Yukon River basin, Alaska: Journal of Geophysical Research G: Biogeosciences, v. 112, no. 4, https://doi.org/10.1029/2006JG000366.","costCenters":[],"links":[{"id":477148,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006jg000366","text":"Publisher Index Page"},{"id":239837,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212364,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2006JG000366"}],"volume":"112","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-11-03","publicationStatus":"PW","scienceBaseUri":"505a6937e4b0c8380cd73c09","contributors":{"authors":[{"text":"Dornblaser, M.M.","contributorId":38765,"corporation":false,"usgs":true,"family":"Dornblaser","given":"M.M.","email":"","affiliations":[],"preferred":false,"id":432695,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Striegl, Robert G. 0000-0002-8251-4659 rstriegl@usgs.gov","orcid":"https://orcid.org/0000-0002-8251-4659","contributorId":1630,"corporation":false,"usgs":true,"family":"Striegl","given":"Robert","email":"rstriegl@usgs.gov","middleInitial":"G.","affiliations":[{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true}],"preferred":false,"id":432696,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031775,"text":"70031775 - 2007 - Origin of pingo-like features on the Beaufort Sea shelf and their possible relationship to decomposing methane gas hydrates","interactions":[],"lastModifiedDate":"2023-10-06T12:04:48.491142","indexId":"70031775","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Origin of pingo-like features on the Beaufort Sea shelf and their possible relationship to decomposing methane gas hydrates","docAbstract":"[1] The Arctic shelf is currently undergoing dramatic thermal changes caused by the continued warming associated with Holocene sea level rise. During this transgression, comparatively warm waters have flooded over cold permafrost areas of the Arctic Shelf. A thermal pulse of more than 10°C is still propagating down into the submerged sediment and may be decomposing gas hydrate as well as permafrost. A search for gas venting on the Arctic seafloor focused on pingo-like-features (PLFs) on the Beaufort Sea Shelf because they may be a direct consequence of gas hydrate decomposition at depth. Vibracores collected from eight PLFs had systematically elevated methane concentrations. ROV observations revealed streams of methane-rich gas bubbles coming from the crests of PLFs. We offer a scenario of how PLFs may be growing offshore as a result of gas pressure associated with gas hydrate decomposition.
Isotopically enriched Hg (90% 202Hg) was added to a small lake in Ontario, Canada, at a rate equivalent to approximately threefold the annual direct atmospheric deposition rate that is typical of the northeastern United States. The Hg spike was thoroughly mixed into the epilimnion in nine separate events at two-week intervals throughout the summer growing season for three consecutive years. We measured concentrations of spike and ambient dissolved gaseous Hg (DGM) concentrations in surface water and the rate of volatilization of Hg from the lake on four separate, week-long sampling periods using floating dynamic flux chambers. The relationship between empirically measured rates of spike-Hg evasion were evaluated as functions of DGM concentration, wind velocity, and solar illumination. No individual environmental variable proved to be a strong predictor of the evasion flux. The DGM-normalized flux (expressed as the mass transfer coefficient, k) varied with wind velocity in a manner consistent with existing models of evasion of volatile solutes from natural waters but was higher than model estimates at low wind velocity. The empirical data were used to construct a description of evasion flux as a function of total dissolved Hg, wind, and solar illumination. That model was then applied to data for three summers for the experiment to generate estimates of Hg re-emission from the lake surface to the atmosphere. Based on ratios of spike Hg to ambient Hg in DGM and dissolved total Hg pools, ratios of DGM to total Hg in spike and ambient Hg pools, and flux estimates of spike and ambient Hg, we concluded that the added Hg spike was chemically indistinguishable from the ambient Hg in its behavior. Approximately 45% of Hg added to the lake over the summer was lost via volatilization.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Toxicology and Chemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1897/06-148R.1","issn":"07307268","usgsCitation":"Southworth, G., Lindberg, S., Hintelmann, H., Amyot, M., Poulain, A., Bogle, M., Peterson, M., Rudd, J., Harris, R., Sandilands, K., Krabbenhoft, D., and Olsen, M.L., 2007, Evasion of added isotopic mercury from a northern temperate lake: Environmental Toxicology and Chemistry, v. 26, no. 1, p. 53-60, https://doi.org/10.1897/06-148R.1.","productDescription":"8 p.","startPage":"53","endPage":"60","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":212311,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1897/06-148R.1"},{"id":239777,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada","city":"Ontario","volume":"26","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-01","publicationStatus":"PW","scienceBaseUri":"505a0d21e4b0c8380cd52e25","contributors":{"authors":[{"text":"Southworth, G.","contributorId":51095,"corporation":false,"usgs":true,"family":"Southworth","given":"G.","email":"","affiliations":[],"preferred":false,"id":433073,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lindberg, S.","contributorId":71341,"corporation":false,"usgs":true,"family":"Lindberg","given":"S.","email":"","affiliations":[],"preferred":false,"id":433076,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hintelmann, H.","contributorId":64423,"corporation":false,"usgs":true,"family":"Hintelmann","given":"H.","email":"","affiliations":[],"preferred":false,"id":433075,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Amyot, M.","contributorId":85404,"corporation":false,"usgs":true,"family":"Amyot","given":"M.","email":"","affiliations":[],"preferred":false,"id":433080,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Poulain, A.","contributorId":86171,"corporation":false,"usgs":true,"family":"Poulain","given":"A.","email":"","affiliations":[],"preferred":false,"id":433081,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Bogle, M.","contributorId":71384,"corporation":false,"usgs":true,"family":"Bogle","given":"M.","email":"","affiliations":[],"preferred":false,"id":433077,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Peterson, M.","contributorId":71514,"corporation":false,"usgs":true,"family":"Peterson","given":"M.","affiliations":[],"preferred":false,"id":433078,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Rudd, J.","contributorId":92054,"corporation":false,"usgs":true,"family":"Rudd","given":"J.","email":"","affiliations":[],"preferred":false,"id":433082,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Harris, R. 0000-0002-9247-0768","orcid":"https://orcid.org/0000-0002-9247-0768","contributorId":13382,"corporation":false,"usgs":true,"family":"Harris","given":"R.","affiliations":[],"preferred":false,"id":433072,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Sandilands, K.","contributorId":101456,"corporation":false,"usgs":true,"family":"Sandilands","given":"K.","affiliations":[],"preferred":false,"id":433083,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Krabbenhoft, David P. 0000-0003-1964-5020 dpkrabbe@usgs.gov","orcid":"https://orcid.org/0000-0003-1964-5020","contributorId":118001,"corporation":false,"usgs":true,"family":"Krabbenhoft","given":"David P.","email":"dpkrabbe@usgs.gov","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":677,"text":"Wisconsin Water Science Center","active":true,"usgs":true}],"preferred":false,"id":433079,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Olsen, Mark L.","contributorId":63852,"corporation":false,"usgs":true,"family":"Olsen","given":"Mark","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":433074,"contributorType":{"id":1,"text":"Authors"},"rank":12}]}} ,{"id":70031801,"text":"70031801 - 2007 - Assessment of fecal pollution sources in a small northern-plains watershed using PCR and phylogenetic analyses of Bacteroidetes 16S rRNA gene","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70031801","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1619,"text":"FEMS Microbiology Ecology","onlineIssn":"1574-6941","printIssn":"0168-6496","active":true,"publicationSubtype":{"id":10}},"title":"Assessment of fecal pollution sources in a small northern-plains watershed using PCR and phylogenetic analyses of Bacteroidetes 16S rRNA gene","docAbstract":"We evaluated the efficacy, sensitivity, host-specificity, and spatial/temporal dynamics of human- and ruminant-specific 16S rRNA gene Bacteroidetes markers used to assess the sources of fecal pollution in a fecally impacted watershed. Phylogenetic analyses of 1271 fecal and environmental 16S rRNA gene clones were also performed to study the diversity of Bacteroidetes in this watershed. The host-specific assays indicated that ruminant feces were present in 28-54% of the water samples and in all sampling seasons, with increasing frequency in downstream sites. The human-targeted assays indicated that only 3-5% of the water samples were positive for human fecal signals, although a higher percentage of human-associated signals (19-24%) were detected in sediment samples. Phylogenetic analysis indicated that 57% of all water clones clustered with yet-to-be-cultured Bacteroidetes species associated with sequences obtained from ruminant feces, further supporting the prevalence of ruminant contamination in this watershed. However, since several clusters contained sequences from multiple sources, future studies need to consider the potential cosmopolitan nature of these bacterial populations when assessing fecal pollution sources using Bacteroidetes markers. Moreover, additional data is needed in order to understand the distribution of Bacteroidetes host-specific markers and their relationship to water quality regulatory standards. ?? 2006 Federation of European Microbiological Societies.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"FEMS Microbiology Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1574-6941.2006.00211.x","issn":"01686496","usgsCitation":"Lamendella, R., Domingo, J., Oerther, D., Vogel, J.R., and Stoeckel, D.M., 2007, Assessment of fecal pollution sources in a small northern-plains watershed using PCR and phylogenetic analyses of Bacteroidetes 16S rRNA gene: FEMS Microbiology Ecology, v. 59, no. 3, p. 651-660, https://doi.org/10.1111/j.1574-6941.2006.00211.x.","startPage":"651","endPage":"660","numberOfPages":"10","costCenters":[],"links":[{"id":477107,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1574-6941.2006.00211.x","text":"Publisher Index Page"},{"id":212611,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1574-6941.2006.00211.x"},{"id":240124,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"59","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ee2fe4b0c8380cd49bf5","contributors":{"authors":[{"text":"Lamendella, R.","contributorId":15833,"corporation":false,"usgs":true,"family":"Lamendella","given":"R.","email":"","affiliations":[],"preferred":false,"id":433186,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Domingo, J.W.S.","contributorId":88153,"corporation":false,"usgs":true,"family":"Domingo","given":"J.W.S.","email":"","affiliations":[],"preferred":false,"id":433189,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Oerther, D.B.","contributorId":93702,"corporation":false,"usgs":true,"family":"Oerther","given":"D.B.","email":"","affiliations":[],"preferred":false,"id":433190,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Vogel, J. R.","contributorId":21639,"corporation":false,"usgs":true,"family":"Vogel","given":"J.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":433187,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Stoeckel, D. M.","contributorId":84855,"corporation":false,"usgs":true,"family":"Stoeckel","given":"D.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":433188,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70031805,"text":"70031805 - 2007 - On the influence of substrate morphology and surface area on phytofauna","interactions":[],"lastModifiedDate":"2012-03-12T17:21:15","indexId":"70031805","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"On the influence of substrate morphology and surface area on phytofauna","docAbstract":"The independent effects and interactions between substrate morphology and substrate surface area on invertebrate density or biomass colonizing artificial plant beds were assessed in a clear-water and a turbid playa lake in Castro County, Texas, USA. Total invertebrate density and biomass were consistently greater on filiform substrates than on laminar substrates with equivalent substrate surface areas. The relationship among treatments (substrates with different morphologies and surface areas) and response (invertebrate density or biomass) was assessed with equally spaced surface areas. Few statistically significant interactions between substrate morphology and surface area were detected, indicating that these factors were mostly independent from each other in their effect on colonizing invertebrates. Although infrequently, when substrate morphology and surface area were not independent, the effects of equally spaced changes in substrate surface area on the rate of change of phytofauna density or biomass per unit of substrate surface area were dependent upon substrate morphology. The absence of three-way interactions indicated that effects of substrate morphology and substrate area on phytofauna density or biomass were independent of environmental conditions outside and inside exclosures. ?? 2006 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10750-006-0359-x","issn":"00188158","usgsCitation":"Becerra-Munoz, S., and Schramm, H., 2007, On the influence of substrate morphology and surface area on phytofauna: Hydrobiologia, v. 575, no. 1, p. 117-128, https://doi.org/10.1007/s10750-006-0359-x.","startPage":"117","endPage":"128","numberOfPages":"12","costCenters":[],"links":[{"id":212195,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10750-006-0359-x"},{"id":239645,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"575","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-09-23","publicationStatus":"PW","scienceBaseUri":"505a6dd9e4b0c8380cd7535c","contributors":{"authors":[{"text":"Becerra-Munoz, S.","contributorId":12691,"corporation":false,"usgs":true,"family":"Becerra-Munoz","given":"S.","email":"","affiliations":[],"preferred":false,"id":433204,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schramm, H.L. Jr.","contributorId":103823,"corporation":false,"usgs":true,"family":"Schramm","given":"H.L.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":433205,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031836,"text":"70031836 - 2007 - Pumping-induced drawdown and stream depletion in a leaky aquifer system","interactions":[],"lastModifiedDate":"2012-03-12T17:21:25","indexId":"70031836","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"Pumping-induced drawdown and stream depletion in a leaky aquifer system","docAbstract":"The impact of ground water pumping on nearby streams is often estimated using analytic models of the interconnected stream-aquifer system. A common assumption of these models is that the pumped aquifer is underlain by an impermeable formation. A new semianalytic solution for drawdown and stream depletion has been developed that does not require this assumption. This solution shows that pumping-induced flow (leakage) through an underlying aquitard can be an important recharge mechanism in many stream-aquifer systems. The relative importance of this source of recharge increases with the distance between the pumping well and the stream. The distance at which leakage becomes the primary component of the pumping-induced recharge depends on the specific properties of the aquifer, aquitard, and streambed. Even when the aquitard is orders of magnitude less transmissive than the aquifer, leakage can be an important recharge mechanism because of the large surface area over which it occurs. Failure to consider aquitard leakage can lead to large overestimations of both the drawdown produced by pumping and the contribution of stream depletion to the pumping-induced recharge. The ramifications for water resources management and water rights adjudication can be significant. A hypothetical example helps illustrate these points and demonstrates that more attention should be given to estimating the properties of aquitards underlying stream-aquifer systems. The solution presented here should serve as a relatively simple but versatile tool for practical assessments of pumping-induced stream-aquifer interactions. However, this solution should not be used for such assessments without site-specific data that indicate pumping has induced leakage through the aquitard. ?? 2006 National Ground Water Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6584.2006.00272.x","issn":"0017467X","usgsCitation":"Butler, J., Zhan, X., and Zlotnik, V., 2007, Pumping-induced drawdown and stream depletion in a leaky aquifer system: Ground Water, v. 45, no. 2, p. 178-186, https://doi.org/10.1111/j.1745-6584.2006.00272.x.","startPage":"178","endPage":"186","numberOfPages":"9","costCenters":[],"links":[{"id":487033,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://digitalcommons.unl.edu/geosciencefacpub/275","text":"External Repository"},{"id":215044,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2006.00272.x"},{"id":242813,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"2","noUsgsAuthors":false,"publicationDate":"2006-11-30","publicationStatus":"PW","scienceBaseUri":"505a9038e4b0c8380cd7fbe1","contributors":{"authors":[{"text":"Butler, J.J. Jr.","contributorId":12194,"corporation":false,"usgs":true,"family":"Butler","given":"J.J.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":433357,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Zhan, X.","contributorId":26477,"corporation":false,"usgs":true,"family":"Zhan","given":"X.","email":"","affiliations":[],"preferred":false,"id":433358,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zlotnik, V.A.","contributorId":102660,"corporation":false,"usgs":true,"family":"Zlotnik","given":"V.A.","email":"","affiliations":[],"preferred":false,"id":433359,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70033162,"text":"70033162 - 2007 - Predicting Secchi disk depth from average beam attenuation in a deep, ultra-clear lake","interactions":[],"lastModifiedDate":"2017-11-22T18:06:00","indexId":"70033162","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"Predicting Secchi disk depth from average beam attenuation in a deep, ultra-clear lake","docAbstract":"We addressed potential sources of error in estimating the water clarity of mountain lakes by investigating the use of beam transmissometer measurements to estimate Secchi disk depth. The optical properties Secchi disk depth (SD) and beam transmissometer attenuation (BA) were measured in Crater Lake (Crater Lake National Park, Oregon, USA) at a designated sampling station near the maximum depth of the lake. A standard 20 cm black and white disk was used to measure SD. The transmissometer light source had a nearly monochromatic wavelength of 660 nm and a path length of 25 cm. We created a SD prediction model by regression of the inverse SD of 13 measurements recorded on days when environmental conditions were acceptable for disk deployment with BA averaged over the same depth range as the measured SD. The relationship between inverse SD and averaged BA was significant and the average 95% confidence interval for predicted SD relative to the measured SD was ??1.6 m (range = -4.6 to 5.5 m) or ??5.0%. Eleven additional sample dates tested the accuracy of the predictive model. The average 95% confidence interval for these sample dates was ??0.7 m (range = -3.5 to 3.8 m) or ??2.2%. The 1996-2000 time-series means for measured and predicted SD varied by 0.1 m, and the medians varied by 0.5 m. The time-series mean annual measured and predicted SD's also varied little, with intra-annual differences between measured and predicted mean annual SD ranging from -2.1 to 0.1 m. The results demonstrated that this prediction model reliably estimated Secchi disk depths and can be used to significantly expand optical observations in an environment where the conditions for standardized SD deployments are limited. ?? 2007 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10750-006-0349-z","issn":"00188158","usgsCitation":"Larson, G., Hoffman, R., Hargreaves, B., and Collier, R., 2007, Predicting Secchi disk depth from average beam attenuation in a deep, ultra-clear lake: Hydrobiologia, v. 574, no. 1, p. 141-148, https://doi.org/10.1007/s10750-006-0349-z.","startPage":"141","endPage":"148","numberOfPages":"8","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":240854,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213248,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10750-006-0349-z"}],"volume":"574","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a81a2e4b0c8380cd7b63c","contributors":{"authors":[{"text":"Larson, G.L.","contributorId":103021,"corporation":false,"usgs":true,"family":"Larson","given":"G.L.","email":"","affiliations":[],"preferred":false,"id":439641,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hoffman, R.L.","contributorId":28778,"corporation":false,"usgs":true,"family":"Hoffman","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":439638,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hargreaves, B.R.","contributorId":71391,"corporation":false,"usgs":true,"family":"Hargreaves","given":"B.R.","email":"","affiliations":[],"preferred":false,"id":439639,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Collier, R.W.","contributorId":98547,"corporation":false,"usgs":true,"family":"Collier","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":439640,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70033158,"text":"70033158 - 2007 - Effects of nutrient enrichment on Prymnesium parvum population dynamics and toxicity: Results from field experiments, Lake Possum Kingdom, USA","interactions":[],"lastModifiedDate":"2021-05-14T19:09:34.419328","indexId":"70033158","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":870,"text":"Aquatic Microbial Ecology","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Effects of nutrient enrichment on Prymnesium parvum population dynamics and toxicity: Results from field experiments, Lake Possum Kingdom, USA","title":"Effects of nutrient enrichment on Prymnesium parvum population dynamics and toxicity: Results from field experiments, Lake Possum Kingdom, USA","docAbstract":"Large fish kills associated with toxic populations of the haptophyte Prymnesium parvum occur worldwide. In the past 5 yr, incidences of P. parvum blooms in inland water bodies of Texas (USA) have increased dramatically, where cell densities in excess of 1 × 107 cells l–1 are typically observed. We conducted field experiments (Lake Possum Kingdom) during the fall and early spring of 28 d duration using 24 enclosures of 1.57 m3 each. The experiments investigated the effect of nutrient enrichment, immigration of P. parvum and addition of barley straw extract on phytoplankton biomass and assemblage structure, P. parvum population density, zooplankton biomass and assemblage structure, bacteria, and toxicity. Nutrient enrichment stimulated P. parvum population growth beyond bloom proportions (>1 × 107 cells l–1). However, P. parvum did not dominate the assemblage under these conditions, as it does during natural blooms. Instead, euglenophytes and chlorophytes dominated. Toxicity, estimated using fish (Pimephales promelas) and cladoceran (Daphnia magna) bioassays and which is linked to P. parvum’s allelopathic and mixotrophic effectiveness, was greatly reduced (eliminated in many cases) under conditions of nutrient enrichment. The suppression of toxicity by nutrient addition suggested that targeted and time-limited nutrient manipulations might be used to mitigate the effects of P. parvum blooms. Immigration of P. parvum into natural assemblages and addition of barley straw extract had no significant effect on plankton dynamics. Inter-Research 2007.
","language":"English","publisher":"Inter-Research Science Publisher","doi":"10.3354/ame046125","issn":"09483055","usgsCitation":"Roelke, D.L., Errera, R., Kiesling, R., Brooks, B., Grover, J.P., Schwierzke, L., Urena-Boeck, F., Baker, J., and Pinckney, J., 2007, Effects of nutrient enrichment on Prymnesium parvum population dynamics and toxicity: Results from field experiments, Lake Possum Kingdom, USA: Aquatic Microbial Ecology, v. 46, no. 2, p. 125-140, https://doi.org/10.3354/ame046125.","productDescription":"16 p.","startPage":"125","endPage":"140","costCenters":[{"id":606,"text":"Upper Midwest Environmental Sciences Center","active":true,"usgs":true}],"links":[{"id":488403,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3354/ame046125","text":"Publisher Index Page"},{"id":240785,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Texas","otherGeospatial":"Lake Possum Kingdom","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -98.6297607421875,\n 32.828827094089085\n ],\n [\n -98.3660888671875,\n 32.828827094089085\n ],\n [\n -98.3660888671875,\n 32.98562797456918\n ],\n [\n -98.6297607421875,\n 32.98562797456918\n ],\n [\n -98.6297607421875,\n 32.828827094089085\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"46","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a076de4b0c8380cd516c3","contributors":{"authors":[{"text":"Roelke, D. L.","contributorId":28342,"corporation":false,"usgs":true,"family":"Roelke","given":"D.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":439617,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Errera, R.M.","contributorId":65206,"corporation":false,"usgs":true,"family":"Errera","given":"R.M.","affiliations":[],"preferred":false,"id":439621,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kiesling, R. 0000-0002-3017-1826","orcid":"https://orcid.org/0000-0002-3017-1826","contributorId":105126,"corporation":false,"usgs":true,"family":"Kiesling","given":"R.","affiliations":[],"preferred":false,"id":439624,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Brooks, B.W.","contributorId":101781,"corporation":false,"usgs":true,"family":"Brooks","given":"B.W.","email":"","affiliations":[],"preferred":false,"id":439623,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Grover, J. P.","contributorId":20453,"corporation":false,"usgs":true,"family":"Grover","given":"J.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":439616,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Schwierzke, L.","contributorId":83238,"corporation":false,"usgs":true,"family":"Schwierzke","given":"L.","email":"","affiliations":[],"preferred":false,"id":439622,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Urena-Boeck, F.","contributorId":58380,"corporation":false,"usgs":true,"family":"Urena-Boeck","given":"F.","email":"","affiliations":[],"preferred":false,"id":439618,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Baker, J.","contributorId":61967,"corporation":false,"usgs":true,"family":"Baker","given":"J.","affiliations":[],"preferred":false,"id":439619,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Pinckney, J.L.","contributorId":62722,"corporation":false,"usgs":true,"family":"Pinckney","given":"J.L.","email":"","affiliations":[],"preferred":false,"id":439620,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}} ,{"id":70033157,"text":"70033157 - 2007 - Generation of fine hydromagmatic ash by growth and disintegration of glassy rinds","interactions":[],"lastModifiedDate":"2019-03-05T10:00:08","indexId":"70033157","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2314,"text":"Journal of Geophysical Research B: Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Generation of fine hydromagmatic ash by growth and disintegration of glassy rinds","docAbstract":"The deposits of mafic hydromagmatic eruptions are more fine grained and variable in vesicularity than dry magmatic deposits. Blocky, equant shapes of many hydromagmatic clasts also contrast with droplet, thread, and bubble wall morphology of dry magmatic fragments. Small (<∼180 μm), blocky hydromagmatic pyroclasts have traditionally been interpreted to result from discrete vapor explosions, although such explosions tend to occur only under certain conditions. This paper considers a process of hydromagmatic ash formation that involves repeated growth and disintegration of glassy rinds on pyroclast surfaces as they deform within turbulent flows. This process, termed “turbulent shedding”, may occur during the expansion phase of vapor explosions or during turbulent but nonexplosive mixing of magma with water, steam, or water sprays. The occurrence of turbulent shedding and the resulting fragment sizes depend on the timescale for rind growth and the timescale between disturbances that remove or disintegrate glassy rinds. Turbulent shedding is directly observable in some small littoral jets at Kilauea. Calculations suggest that, in the presence of liquid water or water sprays, glassy rinds having a thickness of microns to millimeters should form in milliseconds to seconds. This is similar to the timescale between turbulent velocity fluctuations that can shred lava globules and remove such rinds. The fraction of a deposit consisting of fine ash should increase with the duration of this process: Large‐scale Surtseyan jets generate hundreds or thousands of shedding events; bubble bursts or tephra jets at Kilauea's coast may produce only a few.
","language":"English","publisher":"AGU","doi":"10.1029/2005JB003883","issn":"01480227","usgsCitation":"Mastin, L.G., 2007, Generation of fine hydromagmatic ash by growth and disintegration of glassy rinds: Journal of Geophysical Research B: Solid Earth, v. 112, no. 2, https://doi.org/10.1029/2005JB003883.","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":240754,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213157,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2005JB003883"}],"volume":"112","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-02-21","publicationStatus":"PW","scienceBaseUri":"505a1553e4b0c8380cd54d6c","contributors":{"authors":[{"text":"Mastin, Larry G. 0000-0002-4795-1992 lgmastin@usgs.gov","orcid":"https://orcid.org/0000-0002-4795-1992","contributorId":555,"corporation":false,"usgs":true,"family":"Mastin","given":"Larry","email":"lgmastin@usgs.gov","middleInitial":"G.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":439615,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70031837,"text":"70031837 - 2007 - The role of ground water in generating streamflow in headwater areas and in maintaining base flow","interactions":[],"lastModifiedDate":"2012-03-12T17:21:25","indexId":"70031837","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2529,"text":"Journal of the American Water Resources Association","active":true,"publicationSubtype":{"id":10}},"title":"The role of ground water in generating streamflow in headwater areas and in maintaining base flow","docAbstract":"The volume and sustainability of streamflow from headwaters to downstream reaches commonly depend on contributions from ground water. Streams that begin in extensive aquifers generally have a stable point of origin and substantial discharge in their headwaters. In contrast, streams that begin as discharge from rocks or sediments having low permeability have a point of origin that moves up and down the channel seasonally, have small incipient discharge, and commonly go dry. Nearly all streams need to have some contribution from ground water in order to provide reliable habitat for aquatic organisms. Natural processes and human activities can have a substantial effect on the flow of streams between their headwaters and downstream reaches. Streams lose water to ground water when and where their head is higher than the contiguous water table. Although very common in arid regions, loss of stream water to ground water also is relatively common in humid regions. Evaporation, as well as transpiration from riparian vegetation, causing ground-water levels to decline also can cause loss of stream water. Human withdrawal of ground water commonly causes streamflow to decline, and in some regions has caused streams to cease flowing. ?? 2007 American Water Resources Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of the American Water Resources Association","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1752-1688.2007.00003.x","issn":"1093474X","usgsCitation":"Winter, T.C., 2007, The role of ground water in generating streamflow in headwater areas and in maintaining base flow: Journal of the American Water Resources Association, v. 43, no. 1, p. 15-25, https://doi.org/10.1111/j.1752-1688.2007.00003.x.","startPage":"15","endPage":"25","numberOfPages":"11","costCenters":[],"links":[{"id":477175,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1752-1688.2007.00003.x","text":"Publisher Index Page"},{"id":215045,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1752-1688.2007.00003.x"},{"id":242814,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-26","publicationStatus":"PW","scienceBaseUri":"505baf72e4b08c986b3247d5","contributors":{"authors":[{"text":"Winter, T. C.","contributorId":23485,"corporation":false,"usgs":true,"family":"Winter","given":"T.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":433360,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70033149,"text":"70033149 - 2007 - Advantages of wet work for near-surface seismic reflection","interactions":[],"lastModifiedDate":"2012-03-12T17:21:38","indexId":"70033149","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Advantages of wet work for near-surface seismic reflection","docAbstract":"Benefits of shallow water settings (0.1 to 0.5 m) are pronounced on shallow, high-resolution seismic reflection images and, for examples discussed here, range from an order of magnitude increased signal-to-noise ratio to resolution potential elevated by more than 8 times. Overall data quality of high-resolution seismic reflection data at three sites notorious for poor near-surface reflection returns was improved by coupling the source and/or receivers to a well sorted and fully saturated surface. Half-period trace-to-trace static offsets evident in reflections from receivers planted into a creek bank were eliminated by moving the geophones to the base of a shallow creek at the toe of the bank. Reflections from a dipping bedrock were recorded with a dominant frequency approaching 1 KHz from hydrophones in 0.5 m of water at the toe of a dam using a hammer impact source. A tamper impacted by a dead blow hammer in a shallow (10-20 cm) deep creek produced reflections with a dominant frequency over 400 Hz at depths as shallow as 6 ms. ?? 2007 Society of Exploration Geophysicists.","largerWorkTitle":"SEG Technical Program Expanded Abstracts","language":"English","doi":"10.1190/1.2792615","issn":"10523812","usgsCitation":"Miller, R., Markiewicz, R., Rademacker, T., Hopkins, R., Rawcliffe, R., and Paquin, J., 2007, Advantages of wet work for near-surface seismic reflection, in SEG Technical Program Expanded Abstracts, v. 26, no. 1, p. 1147-1151, https://doi.org/10.1190/1.2792615.","startPage":"1147","endPage":"1151","numberOfPages":"5","costCenters":[],"links":[{"id":213531,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1190/1.2792615"},{"id":241161,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-09-14","publicationStatus":"PW","scienceBaseUri":"5059e709e4b0c8380cd477ef","contributors":{"authors":[{"text":"Miller, R. D.","contributorId":92693,"corporation":false,"usgs":true,"family":"Miller","given":"R. D.","affiliations":[],"preferred":false,"id":439581,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Markiewicz, R.D.","contributorId":40431,"corporation":false,"usgs":true,"family":"Markiewicz","given":"R.D.","email":"","affiliations":[],"preferred":false,"id":439578,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rademacker, T.R.","contributorId":64461,"corporation":false,"usgs":true,"family":"Rademacker","given":"T.R.","email":"","affiliations":[],"preferred":false,"id":439579,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hopkins, R.","contributorId":105128,"corporation":false,"usgs":true,"family":"Hopkins","given":"R.","affiliations":[],"preferred":false,"id":439582,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Rawcliffe, R.J.","contributorId":67733,"corporation":false,"usgs":true,"family":"Rawcliffe","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":439580,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Paquin, J.","contributorId":15019,"corporation":false,"usgs":true,"family":"Paquin","given":"J.","email":"","affiliations":[],"preferred":false,"id":439577,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70031842,"text":"70031842 - 2007 - Seasonal nutrient and plankton dynamics in a physical-biological model of Crater Lake","interactions":[],"lastModifiedDate":"2017-11-15T10:10:37","indexId":"70031842","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"Seasonal nutrient and plankton dynamics in a physical-biological model of Crater Lake","docAbstract":"A coupled 1D physical-biological model of Crater Lake is presented. The model simulates the seasonal evolution of two functional phytoplankton groups, total chlorophyll, and zooplankton in good quantitative agreement with observations from a 10-year monitoring study. During the stratified period in summer and early fall the model displays a marked vertical structure: the phytoplankton biomass of the functional group 1, which represents diatoms and dinoflagellates, has its highest concentration in the upper 40 m; the phytoplankton biomass of group 2, which represents chlorophyta, chrysophyta, cryptomonads and cyanobacteria, has its highest concentrations between 50 and 80 m, and phytoplankton chlorophyll has its maximum at 120 m depth. A similar vertical structure is a reoccurring feature in the available data. In the model the key process allowing a vertical separation between biomass and chlorophyll is photoacclimation. Vertical light attenuation (i.e., water clarity) and the physiological ability of phytoplankton to increase their cellular chlorophyll-to-biomass ratio are ultimately determining the location of the chlorophyll maximum. The location of the particle maxima on the other hand is determined by the balance between growth and losses and occurs where growth and losses equal. The vertical particle flux simulated by our model agrees well with flux measurements from a sediment trap. This motivated us to revisit a previously published study by Dymond et al. (1996). Dymond et al. used a box model to estimate the vertical particle flux and found a discrepancy by a factor 2.5-10 between their model-derived flux and measured fluxes from a sediment trap. Their box model neglected the exchange flux of dissolved and suspended organic matter, which, as our model and available data suggests is significant for the vertical exchange of nitrogen. Adjustment of Dymond et al.'s assumptions to account for dissolved and suspended nitrogen yields a flux estimate that is consistent with sediment trap measurements and our model. ?? 2007 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10750-006-2615-5","issn":"00188158","usgsCitation":"Fennel, K., Collier, R., Larson, G., Crawford, G., and Boss, E., 2007, Seasonal nutrient and plankton dynamics in a physical-biological model of Crater Lake: Hydrobiologia, v. 574, no. 1, p. 265-280, https://doi.org/10.1007/s10750-006-2615-5.","startPage":"265","endPage":"280","numberOfPages":"16","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":242381,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214639,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10750-006-2615-5"}],"volume":"574","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b88c7e4b08c986b316b79","contributors":{"authors":[{"text":"Fennel, K.","contributorId":89361,"corporation":false,"usgs":true,"family":"Fennel","given":"K.","affiliations":[],"preferred":false,"id":433384,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Collier, R.","contributorId":36370,"corporation":false,"usgs":true,"family":"Collier","given":"R.","email":"","affiliations":[],"preferred":false,"id":433381,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Larson, G.","contributorId":41585,"corporation":false,"usgs":true,"family":"Larson","given":"G.","email":"","affiliations":[],"preferred":false,"id":433382,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Crawford, G.","contributorId":97624,"corporation":false,"usgs":true,"family":"Crawford","given":"G.","email":"","affiliations":[],"preferred":false,"id":433385,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Boss, E.","contributorId":59544,"corporation":false,"usgs":true,"family":"Boss","given":"E.","email":"","affiliations":[],"preferred":false,"id":433383,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70031965,"text":"70031965 - 2007 - Prioritizing bottomland hardwood forest sites for protection and augmentation","interactions":[],"lastModifiedDate":"2019-09-30T12:01:24","indexId":"70031965","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2821,"text":"Natural Areas Journal","active":true,"publicationSubtype":{"id":10}},"title":"Prioritizing bottomland hardwood forest sites for protection and augmentation","docAbstract":"Bottomland hardwood forest has been greatly diminished by conversion to agriculture. Less than 25% of the pre-Columbian bottomland hardwood forests remain in the southeastern United States. Because of the valuable ecological and hydrological functions performed by these forests, their conservation and restoration has been a high priority. Part of these restoration efforts has focused on developing tools that can be used for both assessments at the landscape level and policy implementation at the local level. The distribution of bottomland hardwood forests in the Cache and White River watersheds in eastern Arkansas were examined using existing GIS databases. Criteria were developed to select areas that should be conserved or augmented for wildlife habitat. Over 67% of the study area was classified as agriculture, with bottomland hardwood forest the next largest habitat class. The thickness of a forest fragment was defined as the radius of the largest circle that can be inscribed in a fragment. Thickness was used in three ways. First, individual forest fragments were identified and selected based on ecological function using criteria we established. Second, individual fragments that were too small to support interior species, but large enough that if moderately augmented they could recover that function, were identified and selected. These augmentable fragments were further prioritized by adjacency to habitat that might be suitable for reforestation, namely agriculture. Third, watersheds were prioritized for conservation and augmentation based on the size and distributions of forest fragment thickness and area within each watershed.","language":"English","publisher":"Natural Areas Association","doi":"10.3375/0885-8608(2007)27[72:PBHFSF]2.0.CO;2","issn":"08858608","usgsCitation":"Carter, J., and Biagas, J., 2007, Prioritizing bottomland hardwood forest sites for protection and augmentation: Natural Areas Journal, v. 27, no. 1, p. 72-82, https://doi.org/10.3375/0885-8608(2007)27[72:PBHFSF]2.0.CO;2.","productDescription":"11 p.","startPage":"72","endPage":"82","numberOfPages":"11","costCenters":[{"id":455,"text":"National Wetlands Research Center","active":true,"usgs":true}],"links":[{"id":242688,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Arkansas","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -92.197265625,\n 33.89321737944089\n ],\n [\n -90.087890625,\n 33.89321737944089\n ],\n [\n -90.087890625,\n 36.16892253622743\n ],\n [\n -92.197265625,\n 36.16892253622743\n ],\n [\n -92.197265625,\n 33.89321737944089\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"27","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a8c71e4b0c8380cd7e6bc","contributors":{"authors":[{"text":"Carter, J. 0000-0003-0110-0284 carterj@usgs.gov","orcid":"https://orcid.org/0000-0003-0110-0284","contributorId":81839,"corporation":false,"usgs":true,"family":"Carter","given":"J.","email":"carterj@usgs.gov","affiliations":[{"id":455,"text":"National Wetlands Research Center","active":true,"usgs":true}],"preferred":true,"id":433915,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Biagas, J. 0000-0001-5548-1970","orcid":"https://orcid.org/0000-0001-5548-1970","contributorId":51558,"corporation":false,"usgs":true,"family":"Biagas","given":"J.","affiliations":[],"preferred":false,"id":433914,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031971,"text":"70031971 - 2007 - Modelingevapotranspirationina sub-tropical climate","interactions":[],"lastModifiedDate":"2012-03-12T17:21:26","indexId":"70031971","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2257,"text":"Journal of Environmental Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Modelingevapotranspirationina sub-tropical climate","docAbstract":"Evapotranspiration (ET) loss is estimated at about 80-85% of annual precipitation in South Florida. Accurate prediction of ET is important during and beyond the implementation of the Comprehensive Everglades Restoration Plan (CERP). In the USDA's Everglades Agro-Hydrology Model (EAHM) the soil water intake is linked with the soil water redistribution, soil evaporation, plant transpiration, subsurface lateral flow and subsurface drainage to calculate daily root zone soil water content. Hydrometeorological data from three sites with different soil moisture content and vegetal cover were used to evaluate the EAHM ET routine. In general, the EAHM water balance sub-model simulated the daily ET with acceptable accuracy in the area with standing water (Everglades) while using the Penman method. However, in the area with grass cover, there was a discrepancy between the model simulated and measured ET using either the Penman or the Priestley-Taylor method. The results indicated that in the region with two distinct climate patterns: dry (low humidity, more wind, and less precipitation) and wet (high humidity, less wind and more rainfall) such as South Florida, a combination method like Penman should be used for prediction of daily ET. However, in order to improve the predictability of the ET methods, information about surface albedo is needed for land surfaces with grass vegetation during the growing season.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Environmental Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"10583912","usgsCitation":"Savabi, M., Cochrane, T., German, E., Ikiz, C., and Cockshutt, N., 2007, Modelingevapotranspirationina sub-tropical climate: Journal of Environmental Hydrology, v. 15, p. 1-15.","startPage":"1","endPage":"15","numberOfPages":"15","costCenters":[],"links":[{"id":242789,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"15","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5c5ee4b0c8380cd6fc35","contributors":{"authors":[{"text":"Savabi, M.R.","contributorId":25376,"corporation":false,"usgs":true,"family":"Savabi","given":"M.R.","email":"","affiliations":[],"preferred":false,"id":433947,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cochrane, T.A.","contributorId":42447,"corporation":false,"usgs":true,"family":"Cochrane","given":"T.A.","email":"","affiliations":[],"preferred":false,"id":433948,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"German, E.","contributorId":45133,"corporation":false,"usgs":true,"family":"German","given":"E.","affiliations":[],"preferred":false,"id":433950,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ikiz, C.","contributorId":101901,"corporation":false,"usgs":true,"family":"Ikiz","given":"C.","email":"","affiliations":[],"preferred":false,"id":433951,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Cockshutt, N.","contributorId":43187,"corporation":false,"usgs":true,"family":"Cockshutt","given":"N.","email":"","affiliations":[],"preferred":false,"id":433949,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70033089,"text":"70033089 - 2007 - Linkages between nutrients and assemblages of macroinvertebrates and fish in wadeable streams: Implication to nutrient criteria development","interactions":[],"lastModifiedDate":"2018-02-06T12:19:51","indexId":"70033089","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1547,"text":"Environmental Management","active":true,"publicationSubtype":{"id":10}},"title":"Linkages between nutrients and assemblages of macroinvertebrates and fish in wadeable streams: Implication to nutrient criteria development","docAbstract":"We sampled 240 wadeable streams across Wisconsin for different forms of phosphorus and nitrogen, and assemblages of macroinvertebrates and fish to (1) examine how macroinvertebrate and fish measures correlated with the nutrients; (2) quantify relationships between key biological measures and nutrient forms to identify potential threshold levels of nutrients to support nutrient criteria development; and (3) evaluate the importance of nutrients in influencing biological assemblages relative to other physicochemical factors at different spatial scales. Twenty-three of the 35 fish and 18 of the 26 macroinvertebrate measures significantly correlated (P < 0.05) with at least one nutrient measure. Percentages of carnivorous, intolerant, and omnivorous fishes, index of biotic integrity, and salmonid abundance were fish measures correlated with the most nutrient measures and had the highest correlation coefficients. Percentages of Ephemeroptera-Plecoptera-Trichoptera individuals and taxa, Hilsenhoff biotic index, and mean tolerance value were macroinvertebrate measures that most strongly correlated with the most nutrient measures. Selected biological measures showed clear trends toward degradation as concentrations of phosphorus and nitrogen increased, and some measures showed clear thresholds where biological measures changed drastically with small changes in nutrient concentrations. Our selected environmental factors explained 54% of the variation in the fish assemblages. Of this explained variance, 46% was attributed to catchment and instream habitat, 15% to nutrients, 3% to other water quality measures, and 36% to the interactions among all the environmental variables. Selected environmental factors explained 53% of the variation in macroinvertebrate assemblages. Of this explained variance, 42% was attributed to catchment and instream habitat, 22% to nutrients, 5% to other water quality measures, and 32% to the interactions among all the environmental variables. ?? 2006 Springer Science+Business Media, Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s00267-006-0135-8","issn":"0364152X","usgsCitation":"Wang, L., Robertson, D.M., and Garrison, P., 2007, Linkages between nutrients and assemblages of macroinvertebrates and fish in wadeable streams: Implication to nutrient criteria development: Environmental Management, v. 39, no. 2, p. 194-212, https://doi.org/10.1007/s00267-006-0135-8.","startPage":"194","endPage":"212","numberOfPages":"19","costCenters":[],"links":[{"id":240849,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213243,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00267-006-0135-8"}],"volume":"39","issue":"2","noUsgsAuthors":false,"publicationDate":"2006-11-22","publicationStatus":"PW","scienceBaseUri":"505a47cde4b0c8380cd679af","contributors":{"authors":[{"text":"Wang, L.","contributorId":76904,"corporation":false,"usgs":true,"family":"Wang","given":"L.","email":"","affiliations":[],"preferred":false,"id":439327,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Robertson, Dale M. 0000-0001-6799-0596 dzrobert@usgs.gov","orcid":"https://orcid.org/0000-0001-6799-0596","contributorId":150760,"corporation":false,"usgs":true,"family":"Robertson","given":"Dale","email":"dzrobert@usgs.gov","middleInitial":"M.","affiliations":[{"id":37947,"text":"Upper Midwest Water Science Center","active":true,"usgs":true}],"preferred":true,"id":439326,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Garrison, P.J.","contributorId":86072,"corporation":false,"usgs":true,"family":"Garrison","given":"P.J.","email":"","affiliations":[],"preferred":false,"id":439328,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031991,"text":"70031991 - 2007 - Ground-penetrating radar: A tool for monitoring bridge scour","interactions":[],"lastModifiedDate":"2012-03-12T17:21:27","indexId":"70031991","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1574,"text":"Environmental & Engineering Geoscience","printIssn":"1078-7275","active":true,"publicationSubtype":{"id":10}},"title":"Ground-penetrating radar: A tool for monitoring bridge scour","docAbstract":"Ground-penetrating radar (GPR) data were acquired across shallow streams and/or drainage ditches at 10 bridge sites in Missouri by maneuvering the antennae across the surface of the water and riverbank from the bridge deck, manually or by boat. The acquired two-dimensional and three-dimensional data sets accurately image the channel bottom, demonstrating that the GPR tool can be used to estimate and/or monitor water depths in shallow fluvial environments. The study results demonstrate that the GPR tool is a safe and effective tool for measuring and/or monitoring scour in proximity to bridges. The technique can be used to safely monitor scour at assigned time intervals during peak flood stages, thereby enabling owners to take preventative action prior to potential failure. The GPR tool can also be used to investigate depositional and erosional patterns over time, thereby elucidating these processes on a local scale. In certain instances, in-filled scour features can also be imaged and mapped. This information may be critically important to those engaged in bridge design. GPR has advantages over other tools commonly employed for monitoring bridge scour (reflection seismic profiling, echo sounding, and electrical conductivity probing). The tool doesn't need to be coupled to the water, can be moved rapidly across (or above) the surface of a stream, and provides an accurate depth-structure model of the channel bottom and subchannel bottom sediments. The GPR profiles can be extended across emerged sand bars or onto the shore.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental and Engineering Geoscience","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2113/gseegeosci.13.1.1","issn":"10787275","usgsCitation":"Anderson, N., Ismael, A., and Thitimakorn, T., 2007, Ground-penetrating radar: A tool for monitoring bridge scour: Environmental & Engineering Geoscience, v. 13, no. 1, p. 1-10, https://doi.org/10.2113/gseegeosci.13.1.1.","startPage":"1","endPage":"10","numberOfPages":"10","costCenters":[],"links":[{"id":214810,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/gseegeosci.13.1.1"},{"id":242562,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"13","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a2b74e4b0c8380cd5b9c1","contributors":{"authors":[{"text":"Anderson, N.L.","contributorId":55129,"corporation":false,"usgs":true,"family":"Anderson","given":"N.L.","email":"","affiliations":[],"preferred":false,"id":434022,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ismael, A.M.","contributorId":88168,"corporation":false,"usgs":true,"family":"Ismael","given":"A.M.","email":"","affiliations":[],"preferred":false,"id":434024,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Thitimakorn, T.","contributorId":75770,"corporation":false,"usgs":true,"family":"Thitimakorn","given":"T.","email":"","affiliations":[],"preferred":false,"id":434023,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ]}