The Los Angeles Basin is a densely populated coastal area that significantly depends on groundwater. A part of this groundwater supply is at risk from saltwater intrusion—the impetus for this study. High-resolution seismic-reflection data collected from the Los Angeles–Long Beach Harbor Complex have been combined with borehole geophysical and descriptive geological data from four nearby ~400-m-deep continuously cored wells and with borehole geophysical data from adjacent water and oil wells to characterize the Pliocene to Holocene stratigraphy of the Dominguez Gap coastal aquifer system. The new data are shown as a north-south, two- dimensional, sequence-stratigraphic model that is compared to existing lithostratigraphic models of the Los Angeles Basin in an attempt to better understand pathways of saltwater intrusion into coastal aquifers.
","language":"English","publisher":"Geological Society of America","doi":"10.1130/2009.2454(5.4)","issn":"00721077","usgsCitation":"Edwards, B.D., Ehman, K.D., Ponti, D.J., Reichard, E.G., Tinsley, J., Rosenbauer, R.J., and Land, M.T., 2009, Stratigraphic controls on saltwater intrusion in the Dominguez Gap area of coastal Los Angeles: Special Paper of the Geological Society of America, no. 454, p. 375-395, https://doi.org/10.1130/2009.2454(5.4).","productDescription":"21 p.","startPage":"375","endPage":"395","numberOfPages":"21","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true},{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":245061,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -119.13999545807462,\n 34.26490751284281\n ],\n [\n -119.13999545807462,\n 33.26025154311533\n ],\n [\n -117.55796420807468,\n 33.26025154311533\n ],\n [\n -117.55796420807468,\n 34.26490751284281\n ],\n [\n -119.13999545807462,\n 34.26490751284281\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","issue":"454","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b98dae4b08c986b31c164","contributors":{"authors":[{"text":"Edwards, Brian D. bedwards@usgs.gov","contributorId":3161,"corporation":false,"usgs":true,"family":"Edwards","given":"Brian","email":"bedwards@usgs.gov","middleInitial":"D.","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":459918,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ehman, Kenneth D.","contributorId":64745,"corporation":false,"usgs":true,"family":"Ehman","given":"Kenneth","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":459923,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ponti, Daniel J. 0000-0002-2437-5144 dponti@usgs.gov","orcid":"https://orcid.org/0000-0002-2437-5144","contributorId":1020,"corporation":false,"usgs":true,"family":"Ponti","given":"Daniel","email":"dponti@usgs.gov","middleInitial":"J.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":459922,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Reichard, Eric G. 0000-0002-7310-3866 egreich@usgs.gov","orcid":"https://orcid.org/0000-0002-7310-3866","contributorId":1207,"corporation":false,"usgs":true,"family":"Reichard","given":"Eric","email":"egreich@usgs.gov","middleInitial":"G.","affiliations":[],"preferred":true,"id":459920,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Tinsley, John jtinsley@usgs.gov","contributorId":140545,"corporation":false,"usgs":true,"family":"Tinsley","given":"John","email":"jtinsley@usgs.gov","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":459921,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Rosenbauer, Robert J. brosenbauer@usgs.gov","contributorId":204,"corporation":false,"usgs":true,"family":"Rosenbauer","given":"Robert","email":"brosenbauer@usgs.gov","middleInitial":"J.","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":459919,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Land, Michael T. 0000-0001-5141-0307 mtland@usgs.gov","orcid":"https://orcid.org/0000-0001-5141-0307","contributorId":173276,"corporation":false,"usgs":true,"family":"Land","given":"Michael","email":"mtland@usgs.gov","middleInitial":"T.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":false,"id":459917,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70035243,"text":"70035243 - 2009 - Soil and nutrient retention in winter-flooded ricefields with implications for watershed management","interactions":[],"lastModifiedDate":"2012-03-12T17:21:53","indexId":"70035243","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2456,"text":"Journal of Soil and Water Conservation","active":true,"publicationSubtype":{"id":10}},"title":"Soil and nutrient retention in winter-flooded ricefields with implications for watershed management","docAbstract":"The ability of water resources to support aquatic life and human needs depends, in part, on reducing nonpoint source pollution amid contemporary agricultural practices. Winter retention of shallow water on rice and other agricultural fields is an accepted management practice for wildlife conservation; however, soil and water conservation benefits are not well documented. We evaluated the ability of four post-harvest ricefield treatment combinations (stubble-flooded, stubble-open, disked-flooded and disked-open) to abate nonpoint source exports into watersheds of the Mississippi Alluvial Valley. Total suspended solid exports were 1,121 kg ha-1 (1,000 lb ac-1) from disked-open fields where rice stubble was disked after harvest and fields were allowed to drain, compared with 35 kg ha-1 (31 lb ac-1) from stubble-flooded fields where stubble was left standing after harvest and fields captured rainfall from November 1 to March 1. Estimates of total suspended solid exports from ricefields based on Landsat imagery and USDA crop data are 0.43 and 0.40 Mg km-2 day-1 in the Big Sunflower and L'Anguille watersheds, respectively. Estimated reductions in total suspended solid exports from ricefields into the Big Sunflower and L'Anguille water-sheds range from 26% to 64% under hypothetical scenarios in which 65% to 100% of the rice production area is managed to capture winter rainfall. Winter ricefield management reduced nonpoint source export by decreasing concentrations of solids and nutrients in, and reducing runoff volume from, ricefields in the Mississippi Alluvial Valley.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Soil and Water Conservation","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2489/jswc.64.3.173","issn":"00224561","usgsCitation":"Manley, S., Kaminski, R., Rodrigue, P., Dewey, J., Schoenholtz, S., Gerard, P., and Reinecke, K.J., 2009, Soil and nutrient retention in winter-flooded ricefields with implications for watershed management: Journal of Soil and Water Conservation, v. 64, no. 3, p. 173-182, https://doi.org/10.2489/jswc.64.3.173.","startPage":"173","endPage":"182","numberOfPages":"10","costCenters":[],"links":[{"id":215336,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2489/jswc.64.3.173"},{"id":243131,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"64","issue":"3","noUsgsAuthors":false,"publicationDate":"2009-06-01","publicationStatus":"PW","scienceBaseUri":"505b91e9e4b08c986b319b96","contributors":{"authors":[{"text":"Manley, S.W.","contributorId":13716,"corporation":false,"usgs":true,"family":"Manley","given":"S.W.","email":"","affiliations":[],"preferred":false,"id":449874,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kaminski, R.M.","contributorId":53330,"corporation":false,"usgs":true,"family":"Kaminski","given":"R.M.","email":"","affiliations":[],"preferred":false,"id":449876,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rodrigue, P.B.","contributorId":98559,"corporation":false,"usgs":true,"family":"Rodrigue","given":"P.B.","email":"","affiliations":[],"preferred":false,"id":449879,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dewey, J.C.","contributorId":7100,"corporation":false,"usgs":true,"family":"Dewey","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":449873,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Schoenholtz, S.H.","contributorId":60178,"corporation":false,"usgs":true,"family":"Schoenholtz","given":"S.H.","affiliations":[],"preferred":false,"id":449878,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Gerard, P.D.","contributorId":16368,"corporation":false,"usgs":true,"family":"Gerard","given":"P.D.","email":"","affiliations":[],"preferred":false,"id":449875,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Reinecke, K. J.","contributorId":54537,"corporation":false,"usgs":true,"family":"Reinecke","given":"K.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":449877,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70179514,"text":"70179514 - 2009 - Integrating toxicity risk in bird eggs and chicks: Using chick down feathers to estimate mercury concentrations in eggs","interactions":[],"lastModifiedDate":"2017-08-23T09:30:32","indexId":"70179514","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","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":"Integrating toxicity risk in bird eggs and chicks: Using chick down feathers to estimate mercury concentrations in eggs","docAbstract":"The concentration of mercury (Hg) in eggs that causes reduced hatching success is regarded as a critical end point for Hg toxicity in birds. However, incorporating effects of in ovo mercury exposure on chick health and survival could improve risk assessment. We developed equations to predict Hg in eggs using Hg in chick down feathers, and vice versa, by assessing the relationship between Hg in feathers (0.5−32.4 μg g−1 fw) and eggs (0.04−2.79 μg g−1 fww) for three waterbird species in San Francisco Bay, CA. Feather Hg sampled from embryos of pipping eggs was highly correlated with fresh whole-egg Hg (n = 94, r2 = 0.96). Additionally, using an egg microsampling technique, albumen Hg was correlated with feather Hg sampled from chicks in the same nest (n = 28, r2 = 0.79). Down feather Hg in recaptured chicks (≤10 days old) was correlated with down feather Hg at hatching (≤3 days old; n = 88, r2 = 0.74). Our results demonstrate the utility of using down feathers of chicks ≤10 days of age to nonlethally predict Hg in eggs and thus provide the ability to develop exposure thresholds for eggs that incorporate in ovo Hg’s effects on both egg hatchability and subsequent chick mortality.
","language":"English","publisher":"ACS Publications","doi":"10.1021/es803159c","usgsCitation":"Ackerman, J., and Eagles-Smith, C.A., 2009, Integrating toxicity risk in bird eggs and chicks: Using chick down feathers to estimate mercury concentrations in eggs: Environmental Science & Technology, v. 43, no. 6, p. 2166-2172, https://doi.org/10.1021/es803159c.","productDescription":"7 p.","startPage":"2166","endPage":"2172","costCenters":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"links":[{"id":332823,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"6","noUsgsAuthors":false,"publicationDate":"2009-02-17","publicationStatus":"PW","scienceBaseUri":"586e182ae4b0f5ce109fcafb","contributors":{"authors":[{"text":"Ackerman, Joshua T. 0000-0002-3074-8322 jackerman@usgs.gov","orcid":"https://orcid.org/0000-0002-3074-8322","contributorId":147078,"corporation":false,"usgs":true,"family":"Ackerman","given":"Joshua T.","email":"jackerman@usgs.gov","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":false,"id":657520,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Eagles-Smith, Collin A. 0000-0003-1329-5285 ceagles-smith@usgs.gov","orcid":"https://orcid.org/0000-0003-1329-5285","contributorId":505,"corporation":false,"usgs":true,"family":"Eagles-Smith","given":"Collin","email":"ceagles-smith@usgs.gov","middleInitial":"A.","affiliations":[{"id":518,"text":"Oregon Water Science Center","active":true,"usgs":true},{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true},{"id":289,"text":"Forest and Rangeland Ecosys Science Center","active":true,"usgs":true}],"preferred":true,"id":657521,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70035254,"text":"70035254 - 2009 - Neotectonic analysis of upper klamath lake, oregon: New insights from seismic reflection data","interactions":[],"lastModifiedDate":"2012-03-12T17:21:52","indexId":"70035254","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3459,"text":"Special Paper of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Neotectonic analysis of upper klamath lake, oregon: New insights from seismic reflection data","docAbstract":"We present marine high-resolution seismic reflection data from Upper Klamath Lake, Oregon, to discern the underlying structure and estimate Quaternary slip rates in this actively extending Basin and Range system. The sediment patterns and structures imaged on our seismic profiles reveal a complex geologic system that reflects a changing climate record, shallow water conditions, growth faulting, contrasting sediment sources, and high slip rates. We observe that Upper Klamath Lake is a sedimentsaturated environment, and sediment accumulation rates are therefore controlled by basin subsidence rather than sediment supply. Published slip rates for Holocene extension are greater than our determined late Quaternary slip rates, assuming reasonable rates of deposition. The apparent increased Holocene fault-slip rates may be in part an artifact of long recurrence intervals between major earthquakes, with recent seismicity accommodating long-term strain. The quantity of observed faults below the lake is at least an order of magnitude greater than those mapped outside the lake, suggesting that many hidden faults throughout the region may be unaccounted for when estimating Basin and Range extension rates. Copyright ?? 2009 The Geological Society of America. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Special Paper of the Geological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/2009.2447(05)","issn":"00721077","usgsCitation":"Liberty, L., Pratt, T.L., Lyle, M., and Madin, I.P., 2009, Neotectonic analysis of upper klamath lake, oregon: New insights from seismic reflection data: Special Paper of the Geological Society of America, no. 447, p. 71-82, https://doi.org/10.1130/2009.2447(05).","startPage":"71","endPage":"82","numberOfPages":"12","costCenters":[],"links":[{"id":215490,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2009.2447(05)"},{"id":243299,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"447","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a645be4b0c8380cd7299e","contributors":{"authors":[{"text":"Liberty, L.M.","contributorId":58749,"corporation":false,"usgs":true,"family":"Liberty","given":"L.M.","affiliations":[],"preferred":false,"id":449918,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pratt, T. L.","contributorId":53072,"corporation":false,"usgs":true,"family":"Pratt","given":"T.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":449917,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lyle, M.","contributorId":40344,"corporation":false,"usgs":true,"family":"Lyle","given":"M.","email":"","affiliations":[],"preferred":false,"id":449915,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Madin, I. P.","contributorId":47031,"corporation":false,"usgs":true,"family":"Madin","given":"I.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":449916,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70037037,"text":"70037037 - 2009 - The Asian clam Corbicula fluminea as a biomonitor of trace element contamination: Accounting for different sources of variation using an hierarchical linear model","interactions":[],"lastModifiedDate":"2012-03-12T17:22:09","indexId":"70037037","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1571,"text":"Environmental Toxicology and Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"The Asian clam Corbicula fluminea as a biomonitor of trace element contamination: Accounting for different sources of variation using an hierarchical linear model","docAbstract":"In the present study, specimens of the invasive clam, Corbicula fluminea, were collected above and below possible sources of potentially toxic trace elements (As, Cd, Cr, Cu, Hg, Pb, and Zn) in the Altamaha River system (Georgia, USA). Bioaccumulation of these elements was quantified, along with environmental (water and sediment) concentrations. Hierarchical linear models were used to account for variability in tissue concentrations related to environmental (site water chemistry and sediment characteristics) and individual (growth metrics) variables while identifying the strongest relations between these variables and trace element accumulation. The present study found significantly elevated concentrations of Cd, Cu, and Hg downstream of the outfall of kaolin-processing facilities, Zn downstream of a tire cording facility, and Cr downstream of both a nuclear power plant and a paper pulp mill. Models of the present study indicated that variation in trace element accumulation was linked to distance upstream from the estuary, dissolved oxygen, percentage of silt and clay in the sediment, elemental concentrations in sediment, shell length, and bivalve condition index. By explicitly modeling environmental variability, the Hierarchical linear modeling procedure allowed the identification of sites showing increased accumulation of trace elements that may have been caused by human activity. Hierarchical linear modeling is a useful tool for accounting for environmental and individual sources of variation in bioaccumulation studies. ?? 2009 SETAC.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Toxicology and Chemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1897/09-058.1","issn":"07307268","usgsCitation":"Shoults-Wilson, W.A., Peterson, J., Unrine, J.M., Rickard, J., and Black, M., 2009, The Asian clam Corbicula fluminea as a biomonitor of trace element contamination: Accounting for different sources of variation using an hierarchical linear model: Environmental Toxicology and Chemistry, v. 28, no. 10, p. 2224-2232, https://doi.org/10.1897/09-058.1.","startPage":"2224","endPage":"2232","numberOfPages":"9","costCenters":[],"links":[{"id":245238,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":217303,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1897/09-058.1"}],"volume":"28","issue":"10","noUsgsAuthors":false,"publicationDate":"2009-10-01","publicationStatus":"PW","scienceBaseUri":"505ba68ce4b08c986b3211d7","contributors":{"authors":[{"text":"Shoults-Wilson, W. A.","contributorId":66515,"corporation":false,"usgs":true,"family":"Shoults-Wilson","given":"W.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":459087,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Peterson, J.T.","contributorId":30170,"corporation":false,"usgs":true,"family":"Peterson","given":"J.T.","email":"","affiliations":[],"preferred":false,"id":459084,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Unrine, J. M.","contributorId":60887,"corporation":false,"usgs":true,"family":"Unrine","given":"J.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":459086,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rickard, J.","contributorId":45933,"corporation":false,"usgs":true,"family":"Rickard","given":"J.","email":"","affiliations":[],"preferred":false,"id":459085,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Black, M.C.","contributorId":89091,"corporation":false,"usgs":true,"family":"Black","given":"M.C.","email":"","affiliations":[],"preferred":false,"id":459088,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70035862,"text":"70035862 - 2009 - Geochemical characterisation of seepage and drainage water quality from two sulphide mine tailings impoundments: Acid mine drainage versus neutral mine drainage","interactions":[],"lastModifiedDate":"2012-03-12T17:21:48","indexId":"70035862","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2745,"text":"Mine Water and the Environment","active":true,"publicationSubtype":{"id":10}},"title":"Geochemical characterisation of seepage and drainage water quality from two sulphide mine tailings impoundments: Acid mine drainage versus neutral mine drainage","docAbstract":"Seepage water and drainage water geochemistry (pH, EC, O2, redox, alkalinity, dissolved cations and trace metals, major anions, total element concentrations) were studied at two active sulphide mine tailings impoundments in Finland (the Hitura Ni mine and Luikonlahti Cu mine/talc processing plant). The data were used to assess the factors influencing tailings seepage quality and to identify constraints for water treatment. Changes in seepage water quality after equilibration with atmospheric conditions were evaluated based on geochemical modelling. At Luikonlahti, annual and seasonal changes were also studied. Seepage quality was largely influenced by the tailings mineralogy, and the serpentine-rich, low sulphide Hitura tailings produced neutral mine drainage with high Ni. In contrast, drainage from the high sulphide, multi-metal tailings of Luikonlahti represented typical acid mine drainage with elevated contents of Zn, Ni, Cu, and Co. Other factors affecting the seepage quality included weathering of the tailings along the seepage flow path, process water input, local hydrological settings, and structural changes in the tailings impoundment. Geochemical modelling showed that pH increased and some heavy metals were adsorbed to Fe precipitates after net alkaline waters equilibrated with the atmosphere. In the net acidic waters, pH decreased and no adsorption occurred. A combination of aerobic and anaerobic treatments is proposed for Hitura seepages to decrease the sulphate and metal loading. For Luikonlahti, prolonged monitoring of the seepage quality is suggested instead of treatment, since the water quality is still adjusting to recent modifications to the tailings impoundment.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Mine Water and the Environment","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10230-008-0056-2","issn":"10259112","usgsCitation":"Heikkinen, P., Raisanen, M., and Johnson, R., 2009, Geochemical characterisation of seepage and drainage water quality from two sulphide mine tailings impoundments: Acid mine drainage versus neutral mine drainage: Mine Water and the Environment, v. 28, no. 1, p. 30-49, https://doi.org/10.1007/s10230-008-0056-2.","startPage":"30","endPage":"49","numberOfPages":"20","costCenters":[],"links":[{"id":244151,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216288,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10230-008-0056-2"}],"volume":"28","issue":"1","noUsgsAuthors":false,"publicationDate":"2008-11-30","publicationStatus":"PW","scienceBaseUri":"505a15ece4b0c8380cd54fb0","contributors":{"authors":[{"text":"Heikkinen, P.M.","contributorId":73435,"corporation":false,"usgs":true,"family":"Heikkinen","given":"P.M.","email":"","affiliations":[],"preferred":false,"id":452792,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Raisanen, M.L.","contributorId":96508,"corporation":false,"usgs":true,"family":"Raisanen","given":"M.L.","email":"","affiliations":[],"preferred":false,"id":452793,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Johnson, R.H.","contributorId":7041,"corporation":false,"usgs":true,"family":"Johnson","given":"R.H.","email":"","affiliations":[],"preferred":false,"id":452791,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70035266,"text":"70035266 - 2009 - Seafloor terrain analysis and geomorphology of the greater Los Angeles Margin and San Pedro Basin, Southern California","interactions":[],"lastModifiedDate":"2012-03-12T17:21:55","indexId":"70035266","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3459,"text":"Special Paper of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Seafloor terrain analysis and geomorphology of the greater Los Angeles Margin and San Pedro Basin, Southern California","docAbstract":"The seafloor off greater Los Angeles, California, has been extensively studied for the past century. Terrain analysis of recently compiled multibeam bathymetry reveals the detailed seafloor morphology along the Los Angeles Margin and San Pedro Basin. The terrain analysis uses the multibeam bathymetry to calculate two seafloor indices, a seafloor slope, and a Topographic Position Index. The derived grids along with depth are analyzed in a hierarchical, decision-tree classification to delineate six seafloor provinces-high-relief shelf, low-relief shelf, steep-basin slope, gentle-basin slope, gullies and canyons, and basins. Rock outcrops protrude in places above the generally smooth continental shelf. Gullies incise the steep-basin slopes, and some submarine canyons extend from the coastline to the basin floor. San Pedro Basin is separated from the Santa Monica Basin to the north by a ridge consisting of the Redondo Knoll and the Redondo Submarine Canyon delta. An 865-m-deep sill separates the two basins. Water depths of San Pedro Basin are ??100 m deeper than those in the San Diego Trough to the south, and three passes breach a ridge that separates the San Pedro Basin from the San Diego Trough. Information gained from this study can be used as base maps for such future studies as tectonic reconstructions, identifying sedimentary processes, tracking pollution transport, and defining benthic habitats. ?? 2009 The Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Special Paper of the Geological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/2009.2454(1.2)","issn":"00721077","usgsCitation":"Dartnell, P., and Gardner, J., 2009, Seafloor terrain analysis and geomorphology of the greater Los Angeles Margin and San Pedro Basin, Southern California: Special Paper of the Geological Society of America, no. 454, p. 9-28, https://doi.org/10.1130/2009.2454(1.2).","startPage":"9","endPage":"28","numberOfPages":"20","costCenters":[],"links":[{"id":215217,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2009.2454(1.2)"},{"id":243004,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"454","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8833e4b08c986b316856","contributors":{"authors":[{"text":"Dartnell, P.","contributorId":60797,"corporation":false,"usgs":true,"family":"Dartnell","given":"P.","email":"","affiliations":[],"preferred":false,"id":449957,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gardner, J.V.","contributorId":76705,"corporation":false,"usgs":true,"family":"Gardner","given":"J.V.","affiliations":[],"preferred":false,"id":449958,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70035877,"text":"70035877 - 2009 - Phosphorus fractionation in sediment cores collected in 2005 before and after onset of an Aphanizomenon flos-aquae bloom in upper Klamath Lake, OR, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:50","indexId":"70035877","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3728,"text":"Water, Air, & Soil Pollution","onlineIssn":"1573-2932","printIssn":"0049-6979","active":true,"publicationSubtype":{"id":10}},"title":"Phosphorus fractionation in sediment cores collected in 2005 before and after onset of an Aphanizomenon flos-aquae bloom in upper Klamath Lake, OR, USA","docAbstract":"We tested the hypothesis that there would be measurable losses of phosphorus (P) from surficial sediments of Upper Klamath Lake (UKL), Oregon, if sediments were a source of P during an algal bloom. We compared concentrations of total and forms of P at various depths in cores collected before and after the onset of a large Aphanizomenon flos-aquae bloom. Concentrations of inorganic P were determined in extraction solutions of MgCl2 (1 M, pH 8), citrate-dithionite-bicarbonate, and 1 M HCl. Sediments below 2 cm were dominated by residual P which is defined as total P minus inorganic P. During the study period, data from the top 2-cm of sediment indicated (a) significant decrease in total P concentration, primarily associated with iron oxyhydroxides at one site, and (b) significant increase in total P concentration associated with residual P at a second site. Data from two other sites indicated no net changes in concentrations of total P. ?? 2009 US Government.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Water, Air, and Soil Pollution","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s11270-009-0033-9","issn":"00496979","usgsCitation":"Simon, N., Lynch, D., and Gallaher, T., 2009, Phosphorus fractionation in sediment cores collected in 2005 before and after onset of an Aphanizomenon flos-aquae bloom in upper Klamath Lake, OR, USA: Water, Air, & Soil Pollution, v. 204, no. 1-4, p. 139-153, https://doi.org/10.1007/s11270-009-0033-9.","startPage":"139","endPage":"153","numberOfPages":"15","costCenters":[],"links":[{"id":216056,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11270-009-0033-9"},{"id":243897,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"204","issue":"1-4","noUsgsAuthors":false,"publicationDate":"2009-04-04","publicationStatus":"PW","scienceBaseUri":"505a78b9e4b0c8380cd7877a","contributors":{"authors":[{"text":"Simon, N.S.","contributorId":103272,"corporation":false,"usgs":true,"family":"Simon","given":"N.S.","email":"","affiliations":[],"preferred":false,"id":452872,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lynch, D.","contributorId":76156,"corporation":false,"usgs":true,"family":"Lynch","given":"D.","affiliations":[],"preferred":false,"id":452871,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gallaher, T.N.","contributorId":35152,"corporation":false,"usgs":true,"family":"Gallaher","given":"T.N.","email":"","affiliations":[],"preferred":false,"id":452870,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70035879,"text":"70035879 - 2009 - Development of regression models to estimate flow duration statistics at ungaged streams in Oklahoma using a regional approach","interactions":[],"lastModifiedDate":"2012-03-12T17:21:50","indexId":"70035879","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Development of regression models to estimate flow duration statistics at ungaged streams in Oklahoma using a regional approach","docAbstract":"Multiple-regression analysis was used to develop equations for estimating annual and seasonal flow-duration statistics at ungaged streams in and near Oklahoma that are not substantially affected by human alteration. Ordinary least-squares and left-censored (Tobit) multiple-regression techniques were used to develop equations that relate these statistics, from continuous streamflow data at gaged locations with 10 or more years of record, to physical and climatic basin characteristics. Separate equations were developed to estimate these statistics for stations within similar hydrologic and geologic regions. Use of separate regressions by region substantially improved the accuracy of the estimate for streams in eastern and central Oklahoma when compared with estimating equations developed for the entire State, especially for regressions estimating lower flow duration values. For all regions, the equations were more reliable for estimating higher flow duration values. The accuracy of regressions for estimating flow duration statistics in western Oklahoma was very poor, especially for lower flow duration values. ?? 2009 ASCE.","largerWorkTitle":"Proceedings of World Environmental and Water Resources Congress 2009 - World Environmental and Water Resources Congress 2009: Great Rivers","conferenceTitle":"World Environmental and Water Resources Congress 2009: Great Rivers","conferenceDate":"17 May 2009 through 21 May 2009","conferenceLocation":"Kansas City, MO","language":"English","doi":"10.1061/41036(342)486","isbn":"9780784410363","usgsCitation":"Esralew, R., 2009, Development of regression models to estimate flow duration statistics at ungaged streams in Oklahoma using a regional approach, in Proceedings of World Environmental and Water Resources Congress 2009 - World Environmental and Water Resources Congress 2009: Great Rivers, v. 342, Kansas City, MO, 17 May 2009 through 21 May 2009, p. 4819-4831, https://doi.org/10.1061/41036(342)486.","startPage":"4819","endPage":"4831","numberOfPages":"13","costCenters":[],"links":[{"id":216084,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1061/41036(342)486"},{"id":243926,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"342","noUsgsAuthors":false,"publicationDate":"2012-04-26","publicationStatus":"PW","scienceBaseUri":"505a0062e4b0c8380cd4f729","contributors":{"authors":[{"text":"Esralew, R.A.","contributorId":71030,"corporation":false,"usgs":true,"family":"Esralew","given":"R.A.","affiliations":[],"preferred":false,"id":452878,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70037211,"text":"70037211 - 2009 - Pink shrimp as an indicator for restoration of everglades ecosystems","interactions":[],"lastModifiedDate":"2012-03-12T17:22:08","indexId":"70037211","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1456,"text":"Ecological Indicators","active":true,"publicationSubtype":{"id":10}},"title":"Pink shrimp as an indicator for restoration of everglades ecosystems","docAbstract":"The pink shrimp, Farfantepenaeus duorarum, familiar to most Floridians as either food or bait shrimp, is ubiquitous in South Florida coastal and offshore waters and is proposed as an indicator for assessing restoration of South Florida's southern estuaries: Florida Bay, Biscayne Bay, and the mangrove estuaries of the lower southwest coast. Relationships between pink shrimp and salinity have been determined in both field and laboratory studies. Salinity is directly relevant to restoration because the salinity regimes of South Florida estuaries, critical nursery habitat for the pink shrimp, will be altered by changes in the quantity, timing, and distribution of freshwater inflow planned as part of the Comprehensive Everglades Restoration Project (CERP). Here we suggest performance measures based on pink shrimp density (number per square meter) in the estuaries and propose a restoration assessment and scoring scheme using these performance measures that can readily be communicated to managers, policy makers, and the interested public. The pink shrimp is an appropriate restoration indicator because of its ecological as well as its economic importance and also because scientific interest in pink shrimp in South Florida has produced a wealth of information about the species and relatively long time series of data on both juveniles in estuarine nursery habitats and adults on the fishing grounds. We suggest research needs for improving the pink shrimp performance measure.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecological Indicators","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.ecolind.2008.10.007","issn":"1470160X","usgsCitation":"Browder, J.A., and Robblee, M., 2009, Pink shrimp as an indicator for restoration of everglades ecosystems: Ecological Indicators, v. 9, no. 6 SUPPL., https://doi.org/10.1016/j.ecolind.2008.10.007.","costCenters":[],"links":[{"id":217111,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.ecolind.2008.10.007"},{"id":245028,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"9","issue":"6 SUPPL.","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7b73e4b0c8380cd7945f","contributors":{"authors":[{"text":"Browder, Joan A.","contributorId":7439,"corporation":false,"usgs":true,"family":"Browder","given":"Joan","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":459913,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Robblee, M. B.","contributorId":23879,"corporation":false,"usgs":true,"family":"Robblee","given":"M. B.","affiliations":[],"preferred":false,"id":459914,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70035880,"text":"70035880 - 2009 - Measuring discharge with ADCPs: Inferences from synthetic velocity profiles","interactions":[],"lastModifiedDate":"2012-03-12T17:21:50","indexId":"70035880","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Measuring discharge with ADCPs: Inferences from synthetic velocity profiles","docAbstract":"Synthetic velocity profiles are used to determine guidelines for sampling discharge with acoustic Doppler current profilers (ADCPs). The analysis allows the effects of instrument characteristics, sampling parameters, and properties of the flow to be studied systematically. For mid-section measurements, the averaging time required for a single profile measurement always exceeded the 40 s usually recommended for velocity measurements, and it increased with increasing sample interval and increasing time scale of the large eddies. Similarly, simulations of transect measurements show that discharge error decreases as the number of large eddies sampled increases. The simulations allow sampling criteria that account for the physics of the flow to be developed. ?? 2009 ASCE.","largerWorkTitle":"Proceedings of World Environmental and Water Resources Congress 2009 - World Environmental and Water Resources Congress 2009: Great Rivers","conferenceTitle":"World Environmental and Water Resources Congress 2009: Great Rivers","conferenceDate":"17 May 2009 through 21 May 2009","conferenceLocation":"Kansas City, MO","language":"English","doi":"10.1061/41036(342)303","isbn":"9780784410363","usgsCitation":"Rehmann, C., Mueller, D.S., and Oberg, K.A., 2009, Measuring discharge with ADCPs: Inferences from synthetic velocity profiles, in Proceedings of World Environmental and Water Resources Congress 2009 - World Environmental and Water Resources Congress 2009: Great Rivers, v. 342, Kansas City, MO, 17 May 2009 through 21 May 2009, p. 2987-2995, https://doi.org/10.1061/41036(342)303.","startPage":"2987","endPage":"2995","numberOfPages":"9","costCenters":[],"links":[{"id":216085,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1061/41036(342)303"},{"id":243927,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"342","noUsgsAuthors":false,"publicationDate":"2012-04-26","publicationStatus":"PW","scienceBaseUri":"505a5347e4b0c8380cd6c98a","contributors":{"authors":[{"text":"Rehmann, C.R.","contributorId":7455,"corporation":false,"usgs":true,"family":"Rehmann","given":"C.R.","email":"","affiliations":[],"preferred":false,"id":452879,"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":452880,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Oberg, K. A.","contributorId":67553,"corporation":false,"usgs":true,"family":"Oberg","given":"K.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":452881,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70036977,"text":"70036977 - 2009 - Morphological variability of the planktonic foraminifer Neogloboquadrina pachyderma from ACEX cores: Implications for late pleistocene circulation in the Arctic Ocean","interactions":[],"lastModifiedDate":"2012-03-12T17:22:01","indexId":"70036977","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2735,"text":"Micropaleontology","active":true,"publicationSubtype":{"id":10}},"title":"Morphological variability of the planktonic foraminifer Neogloboquadrina pachyderma from ACEX cores: Implications for late pleistocene circulation in the Arctic Ocean","docAbstract":"Planktonic foraminifera populations were studied throughout the top 25 meters of the IODP ACEX 302 Hole 4C from the central Arctic Ocean at a resolution varying from 5cm (at the top of the record) to 10cm. Planktonic foraminifera occur in high absolute abundances only in the uppermost fifty centimetres and are dominated by the taxa Neogloboquadrina pachyderma. Except for a few intermittent layers below this level, most samples are barren of calcareous microfossils. Within the topmost sediments, Neogloboquadrina pachyderma specimens present large morphological variability in the shape and number of chambers in the final whorl, chamber sphericity, size, and coiling direction. Five morphotypes were identified among the sinistral (sin.) population (Nps-1 to Nps-5), including a small form (Nps-5) that is similar to a non-encrusted normal form also previously identified in the modern Arctic Ocean water masses. Twenty five percent of the sinistral population is made up by large specimens (Nps-2, 3,4), with a maximal mean diameter larger than 250??m. Following observations made in peri-Arctic seas (Hillaire-Marcel et al. 2004), we propose that occurrence of these large-sized specimens of N. pachyderma (sin.) in the central Arctic Ocean sediments could sign North Atlantic water sub-surface penetration.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Micropaleontology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00262803","usgsCitation":"Eynaud, F., Cronin, T.M., Smith, S., Zaragosi, S., Mavel, J., Mary, Y., Mas, V., and Pujol, C., 2009, Morphological variability of the planktonic foraminifer Neogloboquadrina pachyderma from ACEX cores: Implications for late pleistocene circulation in the Arctic Ocean: Micropaleontology, v. 55, no. 2-3, p. 101-116.","startPage":"101","endPage":"116","numberOfPages":"16","costCenters":[],"links":[{"id":245687,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"55","issue":"2-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5e44e4b0c8380cd708fd","contributors":{"authors":[{"text":"Eynaud, F.","contributorId":42425,"corporation":false,"usgs":true,"family":"Eynaud","given":"F.","email":"","affiliations":[],"preferred":false,"id":458811,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cronin, T. M. 0000-0002-2643-0979","orcid":"https://orcid.org/0000-0002-2643-0979","contributorId":42613,"corporation":false,"usgs":true,"family":"Cronin","given":"T.","email":"","middleInitial":"M.","affiliations":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true}],"preferred":false,"id":458812,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Smith, S.A.","contributorId":72930,"corporation":false,"usgs":true,"family":"Smith","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":458815,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Zaragosi, S.","contributorId":24204,"corporation":false,"usgs":true,"family":"Zaragosi","given":"S.","email":"","affiliations":[],"preferred":false,"id":458810,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Mavel, J.","contributorId":103907,"corporation":false,"usgs":true,"family":"Mavel","given":"J.","email":"","affiliations":[],"preferred":false,"id":458817,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Mary, Y.","contributorId":73037,"corporation":false,"usgs":true,"family":"Mary","given":"Y.","email":"","affiliations":[],"preferred":false,"id":458816,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Mas, V.","contributorId":46341,"corporation":false,"usgs":true,"family":"Mas","given":"V.","email":"","affiliations":[],"preferred":false,"id":458813,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Pujol, C.","contributorId":51582,"corporation":false,"usgs":true,"family":"Pujol","given":"C.","email":"","affiliations":[],"preferred":false,"id":458814,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70036973,"text":"70036973 - 2009 - Geoelectrical measurement and modeling of biogeochemical breakthrough behavior during microbial activity","interactions":[],"lastModifiedDate":"2019-10-21T12:32:34","indexId":"70036973","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","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":"Geoelectrical measurement and modeling of biogeochemical breakthrough behavior during microbial activity","docAbstract":"We recorded bulk electrical conductivity (σb) along a soil column during microbially-mediated selenite oxyanion reduction. Effluent fluid electrical conductivity and early time σb were modeled according to classic advective-dispersive transport of the nutrient medium. However, σb along the column exhibited strongly bimodal breakthrough which cannot be explained by changes in the electrical conductivity of the pore fluid. We model the anomalous breakthrough by adding a conduction path in parallel with the fluid phase, with a time dependence described by a microbial population-dynamics model. We incorporate a delay time to show that breakthrough curves along the column satisfy the same growth model parameters and offer a possible explanation based on biomass-limited growth that is delayed with distance from influent of the nutrient medium. Although the mechanism causing conductivity enhancement in the presence of biomass is uncertain, our results strongly suggest that biogeochemical breakthrough curves have been captured in geoelectrical datasets.
","language":"English","publisher":"AGU","doi":"10.1029/2009GL038695","issn":"00948276","usgsCitation":"Slater, L., Day-Lewis, F.D., Ntarlagiannis, D., O'Brien, M., and Yee, N., 2009, Geoelectrical measurement and modeling of biogeochemical breakthrough behavior during microbial activity: Geophysical Research Letters, v. 36, no. 14, L14402; 5 p., https://doi.org/10.1029/2009GL038695.","productDescription":"L14402; 5 p.","ipdsId":"IP-013008","costCenters":[{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true},{"id":493,"text":"Office of Ground Water","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":476156,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2009gl038695","text":"Publisher Index Page"},{"id":245597,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"36","issue":"14","noUsgsAuthors":false,"publicationDate":"2009-07-28","publicationStatus":"PW","scienceBaseUri":"505a1746e4b0c8380cd55467","contributors":{"authors":[{"text":"Slater, L.D.","contributorId":63229,"corporation":false,"usgs":true,"family":"Slater","given":"L.D.","email":"","affiliations":[],"preferred":false,"id":458796,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Day-Lewis, Frederick D. 0000-0003-3526-886X daylewis@usgs.gov","orcid":"https://orcid.org/0000-0003-3526-886X","contributorId":1672,"corporation":false,"usgs":true,"family":"Day-Lewis","given":"Frederick","email":"daylewis@usgs.gov","middleInitial":"D.","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true},{"id":493,"text":"Office of Ground Water","active":true,"usgs":true}],"preferred":true,"id":458792,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ntarlagiannis, D.","contributorId":57287,"corporation":false,"usgs":true,"family":"Ntarlagiannis","given":"D.","email":"","affiliations":[],"preferred":false,"id":458794,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"O'Brien, M.","contributorId":57980,"corporation":false,"usgs":true,"family":"O'Brien","given":"M.","affiliations":[],"preferred":false,"id":458795,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Yee, N.","contributorId":56461,"corporation":false,"usgs":true,"family":"Yee","given":"N.","email":"","affiliations":[],"preferred":false,"id":458793,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70036971,"text":"70036971 - 2009 - New evidence for a magmatic influence on the origin of Valles Marineris, Mars","interactions":[],"lastModifiedDate":"2018-09-13T16:33:21","indexId":"70036971","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2499,"text":"Journal of Volcanology and Geothermal Research","active":true,"publicationSubtype":{"id":10}},"title":"New evidence for a magmatic influence on the origin of Valles Marineris, Mars","docAbstract":"In this paper, we show that the complex geological evolution of Valles Marineris, Mars, has been highly influenced by the manifestation of magmatism (e.g., possible plume activity). This is based on a diversity of evidence, reported here, for the central part, Melas Chasma, and nearby regions, including uplift, loss of huge volumes of material, flexure, volcanism, and possible hydrothermal and endogenic-induced outflow channel activity. Observations include: (1) the identification of a new > 50??km-diameter caldera/vent-like feature on the southwest flank of Melas, which is spatially associated with a previously identified center of tectonic activity using Viking data; (2) a prominent topographic rise at the central part of Valles Marineris, which includes Melas Chasma, interpreted to mark an uplift, consistent with faults that are radial and concentric about it; (3) HiRISE-identified landforms along the floor of the southeast part of Melas Chasma that are interpreted to reveal a volcanic field; (4) CRISM identification of sulfate-rich outcrops, which could be indicative of hydrothermal deposits; (5) GRS K/Th signature interpreted as water-magma interactions and/or variations in rock composition; and (6) geophysical evidence that may indicate partial compensation of the canyon and/or higher density intrusives beneath it. Long-term magma, tectonic, and water interactions (Late Noachian into the Amazonian), albeit intermittent, point to an elevated life potential, and thus Valles Marineris is considered a prime target for future life detection missions. ?? 2008 Elsevier B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Volcanology and Geothermal Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jvolgeores.2008.11.029","issn":"03770273","usgsCitation":"Dohm, J.M., Williams, J., Anderson, R.C., Ruiz, J., McGuire, P., Komatsu, G., Davila, A., Ferris, J., Schulze-Makuch, D., Baker, V., Boynton, W.V., Fairen, A., Hare, T., Miyamoto, H., Tanaka, K.L., and Wheelock, S., 2009, New evidence for a magmatic influence on the origin of Valles Marineris, Mars: Journal of Volcanology and Geothermal Research, v. 185, no. 1-2, p. 12-27, https://doi.org/10.1016/j.jvolgeores.2008.11.029.","startPage":"12","endPage":"27","numberOfPages":"16","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":476143,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://eprints.ucm.es/id/eprint/10517/1/27-Marte_11.pdf","text":"External Repository"},{"id":245565,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":217609,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jvolgeores.2008.11.029"}],"volume":"185","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6577e4b0c8380cd72bd6","contributors":{"authors":[{"text":"Dohm, J. M.","contributorId":102150,"corporation":false,"usgs":true,"family":"Dohm","given":"J.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":458787,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Williams, J.-P.","contributorId":49185,"corporation":false,"usgs":true,"family":"Williams","given":"J.-P.","email":"","affiliations":[],"preferred":false,"id":458780,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Anderson, R. C.","contributorId":9755,"corporation":false,"usgs":true,"family":"Anderson","given":"R.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":458772,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ruiz, J.","contributorId":88886,"corporation":false,"usgs":true,"family":"Ruiz","given":"J.","email":"","affiliations":[],"preferred":false,"id":458784,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"McGuire, P.C.","contributorId":96521,"corporation":false,"usgs":true,"family":"McGuire","given":"P.C.","email":"","affiliations":[],"preferred":false,"id":458786,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Komatsu, G.","contributorId":35913,"corporation":false,"usgs":true,"family":"Komatsu","given":"G.","email":"","affiliations":[],"preferred":false,"id":458776,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Davila, A.F.","contributorId":76575,"corporation":false,"usgs":true,"family":"Davila","given":"A.F.","email":"","affiliations":[],"preferred":false,"id":458783,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Ferris, J.C.","contributorId":13731,"corporation":false,"usgs":true,"family":"Ferris","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":458773,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Schulze-Makuch, D.","contributorId":62829,"corporation":false,"usgs":true,"family":"Schulze-Makuch","given":"D.","affiliations":[],"preferred":false,"id":458782,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Baker, V.R.","contributorId":47079,"corporation":false,"usgs":true,"family":"Baker","given":"V.R.","email":"","affiliations":[],"preferred":false,"id":458779,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Boynton, W. V.","contributorId":44274,"corporation":false,"usgs":false,"family":"Boynton","given":"W.","email":"","middleInitial":"V.","affiliations":[],"preferred":false,"id":458778,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Fairen, A.G.","contributorId":25335,"corporation":false,"usgs":true,"family":"Fairen","given":"A.G.","email":"","affiliations":[],"preferred":false,"id":458774,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Hare, T.M. 0000-0001-8842-389X","orcid":"https://orcid.org/0000-0001-8842-389X","contributorId":43828,"corporation":false,"usgs":true,"family":"Hare","given":"T.M.","affiliations":[],"preferred":false,"id":458777,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Miyamoto, H.","contributorId":56831,"corporation":false,"usgs":true,"family":"Miyamoto","given":"H.","email":"","affiliations":[],"preferred":false,"id":458781,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Tanaka, K. L.","contributorId":31394,"corporation":false,"usgs":false,"family":"Tanaka","given":"K.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":458775,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"Wheelock, S.J.","contributorId":94523,"corporation":false,"usgs":true,"family":"Wheelock","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":458785,"contributorType":{"id":1,"text":"Authors"},"rank":16}]}} ,{"id":70036970,"text":"70036970 - 2009 - Deformation band clusters on Mars and implications for subsurface fluid flow","interactions":[],"lastModifiedDate":"2019-02-04T14:01:26","indexId":"70036970","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Deformation band clusters on Mars and implications for subsurface fluid flow","docAbstract":"High-resolution imagery reveals unprecedented lines of evidence for the presence of deformation band clusters in layered sedimentary deposits in the equatorial region of Mars. Deformation bands are a class of geologic structural discontinuity that is a precursor to faults in clastic rocks and soils. Clusters of deformation bands, consisting of many hundreds of individual subparallel bands, can act as important structural controls on subsurface fluid flow in terrestrial reservoirs, and evidence of diagenetic processes is often preserved along them. Deformation band clusters are identified on Mars based on characteristic meter-scale architectures and geologic context as observed in data from the High-Resolution Imaging Science Experiment (HiRISE) camera. The identification of deformation band clusters on Mars is a key to investigating the migration of fluids between surface and subsurface reservoirs in the planet's vast sedimentary deposits. Similar to terrestrial examples, evidence of diagenesis in the form of light- and dark-toned discoloration and wall-rock induration is recorded along many of the deformation band clusters on Mars. Therefore, these structures are important sites for future exploration and investigations into the geologic history of water and water-related processes on Mars.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geological Society of America Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Geological Society of America","doi":"10.1130/B26421.1","issn":"00167606","usgsCitation":"Okubo, C., Schultz, R.A., Chan, M.A., Komatsu, G., and the HiRISE TEam, 2009, Deformation band clusters on Mars and implications for subsurface fluid flow: Geological Society of America Bulletin, v. 121, no. 3-4, p. 474-482, https://doi.org/10.1130/B26421.1.","productDescription":"9 p.","startPage":"474","endPage":"482","numberOfPages":"9","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":245564,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Mars","volume":"121","issue":"3-4","noUsgsAuthors":false,"publicationDate":"2009-02-05","publicationStatus":"PW","scienceBaseUri":"5059fe44e4b0c8380cd4ec21","contributors":{"authors":[{"text":"Okubo, Chris 0000-0001-9776-8128 cokubo@usgs.gov","orcid":"https://orcid.org/0000-0001-9776-8128","contributorId":174209,"corporation":false,"usgs":true,"family":"Okubo","given":"Chris","email":"cokubo@usgs.gov","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":458770,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schultz, Richard A.","contributorId":49869,"corporation":false,"usgs":true,"family":"Schultz","given":"Richard","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":458771,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Chan, Marjorie A.","contributorId":66230,"corporation":false,"usgs":true,"family":"Chan","given":"Marjorie","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":458769,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Komatsu, Goro","contributorId":11061,"corporation":false,"usgs":true,"family":"Komatsu","given":"Goro","email":"","affiliations":[],"preferred":false,"id":458768,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"the HiRISE TEam","contributorId":127993,"corporation":true,"usgs":false,"organization":"the HiRISE TEam","id":756440,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70037248,"text":"70037248 - 2009 - A comparison of pre- and post-remediation water quality, Mineral Creek, Colorado","interactions":[],"lastModifiedDate":"2018-10-12T09:58:33","indexId":"70037248","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","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":"A comparison of pre- and post-remediation water quality, Mineral Creek, Colorado","docAbstract":"Pre- and post-remediation data sets are used herein to assess the effectiveness of remedial measures implemented in the headwaters of the Mineral Creek watershed, where contamination from hard rock mining has led to elevated metal concentrations and acidic pH. Collection of pre- and post-remediation data sets generally followed the synoptic mass balance approach, in which numerous stream and inflow locations are sampled for the constituents of interest and estimates of streamflow are determined by tracer dilution. The comparison of pre- and post-remediation data sets is confounded by hydrologic effects and the effects of temporal variation. Hydrologic effects arise due to the relatively wet conditions that preceded the collection of pre-remediation data, and the relatively dry conditions associated with the post-remediation data set. This difference leads to a dilution effect in the upper part of the study reach, where pre-remediation concentrations were diluted by rainfall, and a source area effect in the lower part of the study reach, where a smaller portion of the watershed may have been contributing constituent mass during the drier post-remediation period. A second confounding factor, temporal variability, violates the steady-state assumption that underlies the synoptic mass balance approach, leading to false identification of constituent sources and sinks. Despite these complications, remedial actions completed in the Mineral Creek headwaters appear to have led to improvements in stream water quality, as post-remediation profiles of instream load are consistently lower than the pre-remediation profiles over the entire study reach for six of the eight constituents considered (aluminium, arsenic, cadmium, copper, iron, and zinc). Concentrations of aluminium, cadmium, copper, lead, and zinc remain above chronic aquatic-life standards, however, and additional remedial actions may be needed. Future implementations of the synoptic mass balance approach should be preceded by an assessment of temporal variability, and modifications to the synoptic sampling protocol should be made if necessary.","language":"English","publisher":"Wiley","doi":"10.1002/hyp.7427","issn":"08856087","usgsCitation":"Runkel, R., Bencala, K., Kimball, B.A., Walton-Day, K., and Verplanck, P., 2009, A comparison of pre- and post-remediation water quality, Mineral Creek, Colorado: Hydrological Processes, v. 23, no. 23, p. 3319-3333, https://doi.org/10.1002/hyp.7427.","productDescription":"15 p.","startPage":"3319","endPage":"3333","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":245152,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":217225,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/hyp.7427"}],"country":"United States","state":"Colorado","otherGeospatial":"Mineral Creek","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -109.0,37.0 ], [ -109.0,41.0 ], [ -102.0,41.0 ], [ -102.0,37.0 ], [ -109.0,37.0 ] ] ] } } ] }","volume":"23","issue":"23","noUsgsAuthors":false,"publicationDate":"2009-09-15","publicationStatus":"PW","scienceBaseUri":"5059e370e4b0c8380cd46007","contributors":{"authors":[{"text":"Runkel, R.L.","contributorId":97529,"corporation":false,"usgs":true,"family":"Runkel","given":"R.L.","affiliations":[],"preferred":false,"id":460070,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bencala, K.E.","contributorId":105312,"corporation":false,"usgs":true,"family":"Bencala","given":"K.E.","email":"","affiliations":[],"preferred":false,"id":460071,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kimball, B. A.","contributorId":87583,"corporation":false,"usgs":false,"family":"Kimball","given":"B.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":460069,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Walton-Day, K.","contributorId":14054,"corporation":false,"usgs":true,"family":"Walton-Day","given":"K.","affiliations":[],"preferred":false,"id":460068,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Verplanck, P. L. 0000-0002-3653-6419","orcid":"https://orcid.org/0000-0002-3653-6419","contributorId":106565,"corporation":false,"usgs":true,"family":"Verplanck","given":"P. L.","affiliations":[],"preferred":false,"id":460072,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70035560,"text":"70035560 - 2009 - A new syringe pump apparatus for the retrieval and temporal analysis of helium in groundwaters and geothermal fluids","interactions":[],"lastModifiedDate":"2018-09-13T10:25:22","indexId":"70035560","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1757,"text":"Geochemistry, Geophysics, Geosystems","active":true,"publicationSubtype":{"id":10}},"title":"A new syringe pump apparatus for the retrieval and temporal analysis of helium in groundwaters and geothermal fluids","docAbstract":"We present details of a newly designed syringe pump apparatus for the retrieval and temporal analysis of helium (SPARTAH). The device is composed of a commercially available syringe pump connected to coils of Cu tubing, which interface the syringe and the groundwater or geothermal wellhead. Through test deployments at geothermal wells in Iceland and California, we show that well fluids are drawn smoothly, accurately, and continuously into the Cu tubing and can be time‐stamped through user‐determined operating parameters. In the laboratory, the tubing is sectioned to reveal helium (He) characteristics of the fluids at times and for durations of interest. The device is capable of prolonged deployments, up to 6 months or more, with minimal maintenance. It can be used to produce detailed time series records of He, or any other geochemical parameter, in groundwaters and geothermal fluids. SPARTAH has application in monitoring projects assessing the relationship between external transient events (e.g., earthquakes) and geochemical signals in aqueous fluids.
","language":"English","publisher":"AGU","doi":"10.1029/2009GC002422","issn":"15252027","usgsCitation":"Barry, P., Hilton, D.R., Tryon, M., Brown, K.M., and Kulongoski, J., 2009, A new syringe pump apparatus for the retrieval and temporal analysis of helium in groundwaters and geothermal fluids: Geochemistry, Geophysics, Geosystems, v. 10, no. 5, 9 p., https://doi.org/10.1029/2009GC002422.","productDescription":"9 p.","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":244005,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216156,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2009GC002422"}],"volume":"10","issue":"5","noUsgsAuthors":false,"publicationDate":"2009-05-09","publicationStatus":"PW","scienceBaseUri":"5059e4b8e4b0c8380cd4688d","contributors":{"authors":[{"text":"Barry, P.H.","contributorId":27701,"corporation":false,"usgs":true,"family":"Barry","given":"P.H.","email":"","affiliations":[],"preferred":false,"id":451242,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hilton, David R.","contributorId":37116,"corporation":false,"usgs":true,"family":"Hilton","given":"David","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":451243,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tryon, M.D.","contributorId":100640,"corporation":false,"usgs":true,"family":"Tryon","given":"M.D.","email":"","affiliations":[],"preferred":false,"id":451245,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Brown, K. M.","contributorId":16432,"corporation":false,"usgs":true,"family":"Brown","given":"K.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":451241,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Kulongoski, J.T. 0000-0002-3498-4154","orcid":"https://orcid.org/0000-0002-3498-4154","contributorId":61213,"corporation":false,"usgs":true,"family":"Kulongoski","given":"J.T.","affiliations":[],"preferred":false,"id":451244,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70035563,"text":"70035563 - 2009 - Geomorphic evolution of the Le Sueur River, Minnesota, USA, and implications for current sediment loading","interactions":[],"lastModifiedDate":"2012-03-12T17:21:51","indexId":"70035563","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3459,"text":"Special Paper of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Geomorphic evolution of the Le Sueur River, Minnesota, USA, and implications for current sediment loading","docAbstract":"There is clear evidence that the Minnesota River is the major sediment source for Lake Pepin and that the Le Sueur River is a major source to the Minnesota River. Turbidity levels are high enough to require management actions. We take advantage of the well-constrained Holocene history of the Le Sueur basin and use a combination of remote sensing, fi eld, and stream gauge observations to constrain the contributions of different sediment sources to the Le Sueur River. Understanding the type, location, and magnitude of sediment sources is essential for unraveling the Holocene development of the basin as well as for guiding management decisions about investments to reduce sediment loads. Rapid base-level fall at the outlet of the Le Sueur River 11,500 yr B.P. triggered up to 70 m of channel incision at the mouth. Slope-area analyses of river longitudinal profi les show that knickpoints have migrated 30-35 km upstream on all three major branches of the river, eroding 1.2-2.6 ?? 109 Mg of sediment from the lower valleys in the process. The knick zones separate the basin into an upper watershed, receiving sediment primarily from uplands and streambanks, and a lower, incised zone, which receives additional sediment from high bluffs and ravines. Stream gauges installed above and below knick zones show dramatic increases in sediment loading above that expected from increases in drainage area, indicating substantial inputs from bluffs and ravines.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Special Paper of the Geological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/2009.2451(08)","issn":"00721077","usgsCitation":"Gran, K., Belmont, P., Day, S., Jennings, C., Johnson, A.H., Perg, L., and Wilcock, P., 2009, Geomorphic evolution of the Le Sueur River, Minnesota, USA, and implications for current sediment loading: Special Paper of the Geological Society of America, no. 451, p. 119-130, https://doi.org/10.1130/2009.2451(08).","startPage":"119","endPage":"130","numberOfPages":"12","costCenters":[],"links":[{"id":216184,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2009.2451(08)"},{"id":244037,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"451","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a278fe4b0c8380cd599c1","contributors":{"authors":[{"text":"Gran, K.B.","contributorId":44688,"corporation":false,"usgs":true,"family":"Gran","given":"K.B.","affiliations":[],"preferred":false,"id":451254,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Belmont, P.","contributorId":67322,"corporation":false,"usgs":true,"family":"Belmont","given":"P.","email":"","affiliations":[],"preferred":false,"id":451256,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Day, S.S.","contributorId":42805,"corporation":false,"usgs":true,"family":"Day","given":"S.S.","email":"","affiliations":[],"preferred":false,"id":451253,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jennings, C.","contributorId":78536,"corporation":false,"usgs":true,"family":"Jennings","given":"C.","email":"","affiliations":[],"preferred":false,"id":451257,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Johnson, Aaron H.","contributorId":46971,"corporation":false,"usgs":true,"family":"Johnson","given":"Aaron","email":"","middleInitial":"H.","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":451255,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Perg, L.","contributorId":89744,"corporation":false,"usgs":true,"family":"Perg","given":"L.","email":"","affiliations":[],"preferred":false,"id":451258,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Wilcock, P.R.","contributorId":36709,"corporation":false,"usgs":true,"family":"Wilcock","given":"P.R.","email":"","affiliations":[],"preferred":false,"id":451252,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70035225,"text":"70035225 - 2009 - Hand-mouth transfer and potential for exposure to E. coli and F+ coliphage in beach sand, Chicago, Illinois","interactions":[],"lastModifiedDate":"2012-03-12T17:21:55","indexId":"70035225","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2503,"text":"Journal of Water and Health","active":true,"publicationSubtype":{"id":10}},"title":"Hand-mouth transfer and potential for exposure to E. coli and F+ coliphage in beach sand, Chicago, Illinois","docAbstract":"Beach sand contains fecal indicator bacteria, often in densities greatly exceeding the adjacent swimming waters. We examined the transferability of Escherichia coli and F+ coliphage (MS2) from beach sand to hands in order to estimate the potential subsequent health risk. Sand with high initial E. coli concentrations was collected from a Chicago beach. Individuals manipulated the sand for 60 seconds, and rinse water was analysed for E. coli and coliphage. E. coli densities transferred were correlated with density in sand rather than surface area of an individual's hand, and the amount of coliphage transferred from seeded sand was different among individuals. In sequential rinsing, percentage reduction was 92% for E. coli and 98% for coliphage. Using dose-response estimates developed for swimming water, it was determined that the number of individuals per thousand that would develop gastrointestinal symptoms would be 11 if all E. coli on the fingertip were ingested or 33 if all E. coli on the hand were ingested. These results suggest that beach sand may be an important medium for microbial exposure; bacteria transfer is related to initial concentration in the sand; and rinsing may be effective in limiting oral exposure to sand-borne microbes of human concern.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Water and Health","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2166/wh.2009.115","issn":"14778920","usgsCitation":"Whitman, R., Przybyla-Kelly, K., Shively, D., Nevers, M., and Byappanahalli, M., 2009, Hand-mouth transfer and potential for exposure to E. coli and F+ coliphage in beach sand, Chicago, Illinois: Journal of Water and Health, v. 7, no. 4, p. 623-629, https://doi.org/10.2166/wh.2009.115.","startPage":"623","endPage":"629","numberOfPages":"7","costCenters":[],"links":[{"id":476158,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.2166/wh.2009.115","text":"Publisher Index Page"},{"id":215092,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2166/wh.2009.115"},{"id":242865,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"7","issue":"4","noUsgsAuthors":false,"publicationDate":"2009-07-01","publicationStatus":"PW","scienceBaseUri":"505a2f63e4b0c8380cd5cd4d","contributors":{"authors":[{"text":"Whitman, R.L.","contributorId":69750,"corporation":false,"usgs":true,"family":"Whitman","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":449816,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Przybyla-Kelly, K.","contributorId":23332,"corporation":false,"usgs":true,"family":"Przybyla-Kelly","given":"K.","email":"","affiliations":[],"preferred":false,"id":449815,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Shively, D.A.","contributorId":78123,"corporation":false,"usgs":true,"family":"Shively","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":449817,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nevers, M.B.","contributorId":13787,"corporation":false,"usgs":true,"family":"Nevers","given":"M.B.","email":"","affiliations":[],"preferred":false,"id":449814,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Byappanahalli, M.N.","contributorId":11384,"corporation":false,"usgs":true,"family":"Byappanahalli","given":"M.N.","email":"","affiliations":[],"preferred":false,"id":449813,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70035888,"text":"70035888 - 2009 - Recommendations for control of pathogens and infectious diseases in fish research facilities","interactions":[],"lastModifiedDate":"2017-05-06T15:32:19","indexId":"70035888","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1296,"text":"Comparative Biochemistry and Physiology, Part C: Toxicology & Pharmacology","active":true,"publicationSubtype":{"id":10}},"title":"Recommendations for control of pathogens and infectious diseases in fish research facilities","docAbstract":"Concerns about infectious diseases in fish used for research have risen along with the dramatic increase in the use of fish as models in biomedical research. In addition to acute diseases causing severe morbidity and mortality, underlying chronic conditions that cause low-grade or subclinical infections may confound research results. Here we present recommendations and strategies to avoid or minimize the impacts of infectious agents in fishes maintained in the research setting. There are distinct differences in strategies for control of pathogens in fish used for research compared to fishes reared as pets or in aquaculture. Also, much can be learned from strategies and protocols for control of diseases in rodents used in research, but there are differences. This is due, in part, the unique aquatic environment that is modified by the source and quality of the water provided and the design of facilities. The process of control of pathogens and infectious diseases in fish research facilities is relatively new, and will be an evolving process over time. Nevertheless, the goal of documenting, detecting, and excluding pathogens in fish is just as important as in mammalian research models.