{"pageNumber":"973","pageRowStart":"24300","pageSize":"25","recordCount":68937,"records":[{"id":70030983,"text":"70030983 - 2007 - Application of a source apportionment model in consideration of volatile organic compounds in an urban stream","interactions":[],"lastModifiedDate":"2012-03-12T17:21:04","indexId":"70030983","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Application of a source apportionment model in consideration of volatile organic compounds in an urban stream","docAbstract":"Position-dependent concentrations of trichloroethylene and methyl-tert-butyl ether are considered for a 2.81-km section of the Aberjona River in Massachusetts, USA. This river flows through Woburn and Winchester (Massachusetts, USA), an area that is highly urbanized, has a long history of industrial activities dating to the early 1800s, and has gained national attention because of contamination from chlorinated solvent compounds in Woburn wells G and H. The river study section is in Winchester and begins approximately five stream kilometers downstream from the Woburn wells superfund site. Approximately 300 toxic release sites are documented in the watershed upstream from the terminus of the study section. The inflow to the river study section is considered one source of contamination. Other sources are the atmosphere, a tributary flow, and groundwater flows entering the river; the latter are categorized according to stream zone (1, 2, 3, etc.). Loss processes considered include outflows to groundwater and water-to-atmosphere transfer of volatile compounds. For both trichloroethylene and methyl-rerf-butyl ether, degradation is neglected over the timescale of interest. Source apportionment fractions with assigned values ??inflow, ??1, ??2, ??3, etc. are tracked by a source apportionment model. The strengths of the groundwater and tributary sources serve as fitting parameters when minimizing a reduced least squares statistic between water concentrations measured during a synoptic study in July 2001 versus predictions from the model. The model fits provide strong evidence of substantial unknown groundwater sources of trichloroethylene and methyl-tert-butyl ether amounting to tens of grams per day of trichloroethylene and methyl-tert-butyl ether in the river along the study section. Modeling in a source apportionment manner can be useful to water quality managers allocating limited resources for remediation and source control. ?? 2007 SETAC.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Toxicology and Chemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1897/06-557R.1","issn":"07307268","usgsCitation":"Asher, W., Luo, W., Campo, K., Bender, D., Robinson, K.W., Zogorski, J., and Pankow, J.F., 2007, Application of a source apportionment model in consideration of volatile organic compounds in an urban stream: Environmental Toxicology and Chemistry, v. 26, no. 8, p. 1606-1613, https://doi.org/10.1897/06-557R.1.","startPage":"1606","endPage":"1613","numberOfPages":"8","costCenters":[],"links":[{"id":211641,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1897/06-557R.1"},{"id":238968,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"8","noUsgsAuthors":false,"publicationDate":"2007-08-01","publicationStatus":"PW","scienceBaseUri":"5059ec93e4b0c8380cd4935d","contributors":{"authors":[{"text":"Asher, W.E.","contributorId":99339,"corporation":false,"usgs":true,"family":"Asher","given":"W.E.","email":"","affiliations":[],"preferred":false,"id":429498,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Luo, W.","contributorId":71331,"corporation":false,"usgs":true,"family":"Luo","given":"W.","email":"","affiliations":[],"preferred":false,"id":429497,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Campo, K.W.","contributorId":102270,"corporation":false,"usgs":true,"family":"Campo","given":"K.W.","email":"","affiliations":[],"preferred":false,"id":429499,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bender, D.A.","contributorId":49537,"corporation":false,"usgs":true,"family":"Bender","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":429496,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Robinson, K. W.","contributorId":27488,"corporation":false,"usgs":true,"family":"Robinson","given":"K.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":429495,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Zogorski, J.S.","contributorId":108201,"corporation":false,"usgs":true,"family":"Zogorski","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":429500,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Pankow, J. F.","contributorId":20917,"corporation":false,"usgs":true,"family":"Pankow","given":"J.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":429494,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70030964,"text":"70030964 - 2007 - Thioarsenates in geothermal waters of Yellowstone National Park: Determination, preservation, and geochemical importance","interactions":[],"lastModifiedDate":"2018-10-16T08:33:27","indexId":"70030964","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Thioarsenates in geothermal waters of Yellowstone National Park: Determination, preservation, and geochemical importance","docAbstract":"<p>Mono-, di-, tri-, and tetrathioarsenate, as well as methylated arsenic oxy- and thioanions, were determined besides arsenite and arsenate in geothermal waters of Yellowstone National Park using anion-exchange chromatography inductively coupled plasma mass spectrometry. Retention time match with synthetic standards, measured S:As ratios, and molecular electrospray mass spectra support the identification. Acidification was unsuitable for arsenic species preservation in sulfidic waters, with HCl addition causing loss of total dissolved arsenic, presumably by precipitation of arsenic-sulfides. Flash-freezing is preferred for the preservation of arsenic species for several weeks. After thawing, samples must be analyzed immediately. Thioarsenates occurred over a pH range of 2.1 to 9.3 in the geothermal waters. They clearly predominated under alkaline conditions (up to 83% of total arsenic), but monothioarsenate also was detected in acidic waters (up to 34%). Kinetic studies along a drainage channel showed the importance of thioarsenates for the fate of arsenic discharged from the sulfidic hot spring. The observed arsenic speciation changes suggest three separate reactions: the transformation of trithioarsenate to arsenite (major initial reaction), the stepwise ligand exchange from tri- via di- and monothioarsenate to arsenate (minor reaction), and the oxidation of arsenite to arsenate, which only becomes quantitatively important after thioarsenates have disappeared.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Science and Technology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1021/es070273v","issn":"0013936X","usgsCitation":"Planer-Friedrich, B., London, J., McCleskey, R.B., Nordstrom, D.K., and Wallschlager, D., 2007, Thioarsenates in geothermal waters of Yellowstone National Park: Determination, preservation, and geochemical importance: Environmental Science & Technology, v. 41, no. 15, p. 5245-5251, https://doi.org/10.1021/es070273v.","productDescription":"7 p.","startPage":"5245","endPage":"5251","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":211362,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/es070273v"},{"id":238640,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Wyoming","otherGeospatial":"Yellowstone National Park","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -111.368408203125,\n              43.67581809328341\n            ],\n            [\n              -109.522705078125,\n              43.67581809328341\n            ],\n            [\n              -109.522705078125,\n              45.19752230305682\n            ],\n            [\n              -111.368408203125,\n              45.19752230305682\n            ],\n            [\n              -111.368408203125,\n              43.67581809328341\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"41","issue":"15","noUsgsAuthors":false,"publicationDate":"2007-06-16","publicationStatus":"PW","scienceBaseUri":"505bb2c0e4b08c986b3259b9","contributors":{"authors":[{"text":"Planer-Friedrich, B.","contributorId":87749,"corporation":false,"usgs":true,"family":"Planer-Friedrich","given":"B.","email":"","affiliations":[],"preferred":false,"id":429419,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"London, J.","contributorId":22931,"corporation":false,"usgs":true,"family":"London","given":"J.","email":"","affiliations":[],"preferred":false,"id":429417,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McCleskey, R. Blaine 0000-0002-2521-8052 rbmccles@usgs.gov","orcid":"https://orcid.org/0000-0002-2521-8052","contributorId":147399,"corporation":false,"usgs":true,"family":"McCleskey","given":"R.","email":"rbmccles@usgs.gov","middleInitial":"Blaine","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":503,"text":"Office of Water Quality","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":429416,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nordstrom, D. Kirk 0000-0003-3283-5136 dkn@usgs.gov","orcid":"https://orcid.org/0000-0003-3283-5136","contributorId":749,"corporation":false,"usgs":true,"family":"Nordstrom","given":"D.","email":"dkn@usgs.gov","middleInitial":"Kirk","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":false,"id":429420,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Wallschlager, D.","contributorId":38357,"corporation":false,"usgs":true,"family":"Wallschlager","given":"D.","email":"","affiliations":[],"preferred":false,"id":429418,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70033634,"text":"70033634 - 2007 - The importance of subsurface geology for water source and vegetation communities in Cherokee Marsh, Wisconsin","interactions":[],"lastModifiedDate":"2020-09-10T19:08:23.416541","indexId":"70033634","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":"The importance of subsurface geology for water source and vegetation communities in Cherokee Marsh, Wisconsin","docAbstract":"<p><span>Restoration of disturbed wetland systems is an important component of wetland mitigation, yet uncertainty remains about how hydrologic processes affect biologic processes and wetlands patterns. To design more effective restoration strategies and re-establish native plant communities in disturbed wetlands, it is imperative to understand undisturbed systems. A site within Cherokee Marsh located in Madison, Wisconsin, USA, contains a relatively undisturbed area of wetland consisting of plant communities common within the prairie landscape including a fen, sedge meadow, and shallow marsh. These distinct communities are found within an area of minimal topographic relief, yet transitions from one community to the next occur over short distances. This study sought to characterize the geologic, hydrologic, and chemical gradients associated with these shifts in vegetation to gain insight into the factors controlling the spatial differences in dominant plant species, which could be critical for restoration success. Vegetation analyses revealed a transition of dominant sedge species, which appeared to correspond to changes in hydrology from a ground-water dominated to a surface-water dominated system (as determined by water isotopes). Along the same vegetation transect, subsurface coring results show a heterogeneous composition of peat and till with lateral and vertical variations in stratigraphy, which relates to variability in ground-water discharge as evidenced by hydroperiods and stable isotope composition. Applications of this type of approach throughout the glaciated terrains of the midwestern and northeastern United States and Canada can improve future wetland restoration and management.</span></p>","doi":"10.1672/0277-5212(2007)27[189:TIOSGF]2.0.CO;2","usgsCitation":"Kurtz, A., Bahr, J., Carpenter, Q.J., and Hunt, R., 2007, The importance of subsurface geology for water source and vegetation communities in Cherokee Marsh, Wisconsin: Wetlands, v. 27, no. 1, p. 189-202, https://doi.org/10.1672/0277-5212(2007)27[189:TIOSGF]2.0.CO;2.","productDescription":"14 p.","startPage":"189","endPage":"202","numberOfPages":"14","costCenters":[],"links":[{"id":241989,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Wisconsin","otherGeospatial":"Cherokee Marsh","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -89.4015884399414,\n              43.137069765760344\n            ],\n            [\n              -89.3579864501953,\n              43.1529763194357\n            ],\n            [\n              -89.33446884155273,\n              43.162994070968374\n            ],\n            [\n              -89.33378219604492,\n              43.18427633964703\n            ],\n            [\n              -89.34288024902344,\n              43.19203626250746\n            ],\n            [\n              -89.38013076782227,\n              43.18527767545014\n            ],\n            [\n              -89.4063949584961,\n              43.158861947471785\n            ],\n            [\n              -89.41188812255858,\n              43.14258116631987\n            ],\n            [\n              -89.4093132019043,\n              43.1355665702956\n            ],\n            [\n              -89.4015884399414,\n              43.13656870471118\n            ],\n            [\n              -89.4015884399414,\n              43.137069765760344\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"27","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bacffe4b08c986b3238e4","contributors":{"authors":[{"text":"Kurtz, A.M.","contributorId":74969,"corporation":false,"usgs":true,"family":"Kurtz","given":"A.M.","email":"","affiliations":[],"preferred":false,"id":441779,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bahr, J.M.","contributorId":62346,"corporation":false,"usgs":true,"family":"Bahr","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":441778,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Carpenter, Q. J.","contributorId":38743,"corporation":false,"usgs":false,"family":"Carpenter","given":"Q.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":441776,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hunt, Randal J. 0000-0001-6465-9304","orcid":"https://orcid.org/0000-0001-6465-9304","contributorId":52861,"corporation":false,"usgs":true,"family":"Hunt","given":"Randal J.","affiliations":[],"preferred":false,"id":441777,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70033633,"text":"70033633 - 2007 - The importance of shallow confining units to submarine groundwater flow","interactions":[],"lastModifiedDate":"2017-10-04T15:28:30","indexId":"70033633","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"The importance of shallow confining units to submarine groundwater flow","docAbstract":"In addition to variable density flow, the lateral and vertical heterogeneity of submarine sediments creates important controls on coastal aquifer systems. Submarine confining units produce semi-confined offshore aquifers that are recharged on shore. These low-permeability deposits are usually either late Pleistocene to Holocene in age, or date to the period of the last interglacial highstand. Extensive confining units consisting of peat form in tropical mangrove swamps, and in salt marshes and freshwater marshes and swamps at mid-latitudes. At higher latitudes, fine-grained glaciomarine sediments are widespread. The net effect of these shallow confining units is that groundwater from land often flows farther offshore before discharging than would normally be expected. In many settings, the presence of such confining units is critical to determining how and where pollutants from land will be discharged into coastal waters. Alternatively, these confining units may also protect fresh groundwater supplies from saltwater intrusion into coastal wells.","largerWorkTitle":"IAHS-AISH Publication","conferenceTitle":"International Symposium: A New Focus on Groundwater - Seawater Interactions - 24th General Assembly of the In","conferenceDate":"2 July 2007 through 13 July 2007","conferenceLocation":"Perugia","language":"English","issn":"01447","isbn":"9781901502046","usgsCitation":"Bratton, J., 2007, The importance of shallow confining units to submarine groundwater flow, <i>in</i> IAHS-AISH Publication, no. 312, Perugia, 2 July 2007 through 13 July 2007, p. 28-36.","productDescription":"9 p.","startPage":"28","endPage":"36","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":241988,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"312","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bacfde4b08c986b3238d4","contributors":{"authors":[{"text":"Bratton, J.F.","contributorId":94354,"corporation":false,"usgs":true,"family":"Bratton","given":"J.F.","email":"","affiliations":[],"preferred":false,"id":441775,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70033606,"text":"70033606 - 2007 - Effects of habitat management treatments on plant community composition and biomass in a Montane wetland","interactions":[],"lastModifiedDate":"2020-09-10T18:58:21.304105","indexId":"70033606","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 habitat management treatments on plant community composition and biomass in a Montane wetland","docAbstract":"<p><span>Grazing and burning are commonly applied practices that can impact the diversity and biomass of wetland plant communities. We evaluated the vegetative response of wetlands and adjacent upland grasslands to four treatment regimes (continuous idle, fall prescribed burning followed by idle, annual fall cattle grazing, and rotation of summer grazing and idle) commonly used by the U.S. Fish and Wildlife Service. Our study area was Grays Lake, a large, montane wetland in southeastern Idaho that is bordered by extensive wet meadows. We identified seven plant cover types, representing the transition from dry meadow to deep wetland habitats: mixed deep marsh, spikerush slough, Baltic rush (</span><i>Juncus balticus</i><span>), moist meadow, alkali, mesic meadow, and dry meadow. We compared changes in community composition and total aboveground biomass of each plant cover type between 1998, when all units had been idled for three years, and 1999 (1 yr post-treatment) and 2000 (2 yr post-treatment). Analysis using non-metric multidimensional scaling indicated that compositional changes varied among cover types, treatments, and years following treatment. Treatment-related changes in community composition were greatest in mixed deep marsh, Baltic rush, and mesic meadow. In mixed deep marsh and Baltic rush, grazing and associated trampling contributed to changes in the plant community toward more open water and aquatic species and lower dominance of Baltic rush; grazing and trampling also seemed to contribute to increased cover in mesic meadow. Changing hydrological conditions, from multiple years of high water to increasing drought, was an important factor influencing community composition and may have interacted with management treatments. Biomass differed among treatments and between years within cover types. In the wettest cover types, fall burning and grazing rotation treatments had greater negative impact on biomass than the idle treatment, but in drier cover types, summer grazing stimulated biomass production. Our results illustrate the spatial and temporal complexity of the transition between dry meadow and wetland habitats, and variable interactions among plant communities, treatments, and annual wetland conditions.</span></p>","language":"English","publisher":"Springer","doi":"10.1672/0277-5212(2007)27[570:EOHMTO]2.0.CO;2","usgsCitation":"Austin, J.E., Keough, J.R., and Pyle, W., 2007, Effects of habitat management treatments on plant community composition and biomass in a Montane wetland: Wetlands, v. 27, no. 3, p. 570-587, https://doi.org/10.1672/0277-5212(2007)27[570:EOHMTO]2.0.CO;2.","productDescription":"18 p.","startPage":"570","endPage":"587","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":241987,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Idaho","otherGeospatial":"Gray's Lake","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -111.4320945739746,\n              42.995482339084376\n            ],\n            [\n              -111.37870788574219,\n              42.995482339084376\n            ],\n            [\n              -111.37870788574219,\n              43.04593448499866\n            ],\n            [\n              -111.4320945739746,\n              43.04593448499866\n            ],\n            [\n              -111.4320945739746,\n              42.995482339084376\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"27","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a070ae4b0c8380cd51522","contributors":{"authors":[{"text":"Austin, Jane E. 0000-0001-8775-2210 jaustin@usgs.gov","orcid":"https://orcid.org/0000-0001-8775-2210","contributorId":146411,"corporation":false,"usgs":true,"family":"Austin","given":"Jane","email":"jaustin@usgs.gov","middleInitial":"E.","affiliations":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"preferred":true,"id":441643,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Keough, Janet R.","contributorId":49300,"corporation":false,"usgs":true,"family":"Keough","given":"Janet","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":441645,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pyle, W.H.","contributorId":52518,"corporation":false,"usgs":true,"family":"Pyle","given":"W.H.","email":"","affiliations":[],"preferred":false,"id":441644,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70033578,"text":"70033578 - 2007 - Organic contaminants in onsite wastewater treatment systems","interactions":[],"lastModifiedDate":"2012-03-12T17:21:33","indexId":"70033578","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Organic contaminants in onsite wastewater treatment systems","docAbstract":"Wastewater from thirty onsite wastewater treatment systems was sampled during a reconnaissance field study to quantify bulk parameters and the occurrence of organic wastewater contaminants including endocrine disrupting compounds in treatment systems representing a variety of wastewater sources and treatment processes and their receiving environments. Bulk parameters ranged in concentrations representative of the wide variety of wastewater sources (residential vs. non-residential). Organic contaminants such as sterols, surfactant metabolites, antimicrobial agents, stimulants, metal-chelating agents, and other consumer product chemicals, measured by gas chromatography/mass spectrometry were detected frequently in onsite system wastewater. Wastewater composition was unique between source type likely due to differences in source water and chemical usage. Removal efficiencies varied by engineered treatment type and physicochemical properties of the contaminant, resulting in discharge to the soil treatment unit at ecotoxicologically-relevant concentrations. Organic wastewater contaminants were detected less frequently and at lower concentrations in onsite system receiving environments. Understanding the occurrence and fate of organic wastewater contaminants in onsite wastewater treatment systems will aid in minimizing risk to ecological and human health.","largerWorkTitle":"ASABE - Individual and Small Community Sewage Systems XI, Proceedings of the 11th National Symposium","conferenceTitle":"11th National Symposium on Individual and Small Community Sewage Systems","conferenceDate":"20 October 2007 through 24 October 2007","conferenceLocation":"Warwick, RI","language":"English","usgsCitation":"Conn, K., Siegrist, R., Barber, L.B., and Brown, G., 2007, Organic contaminants in onsite wastewater treatment systems, <i>in</i> ASABE - Individual and Small Community Sewage Systems XI, Proceedings of the 11th National Symposium, Warwick, RI, 20 October 2007 through 24 October 2007.","numberOfPages":"1","costCenters":[],"links":[{"id":242088,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6f9fe4b0c8380cd75bb6","contributors":{"authors":[{"text":"Conn, K.E.","contributorId":64433,"corporation":false,"usgs":true,"family":"Conn","given":"K.E.","email":"","affiliations":[],"preferred":false,"id":441515,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Siegrist, R.L.","contributorId":54005,"corporation":false,"usgs":true,"family":"Siegrist","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":441513,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Barber, L. B.","contributorId":64602,"corporation":false,"usgs":true,"family":"Barber","given":"L.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":441516,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Brown, G.K.","contributorId":62362,"corporation":false,"usgs":true,"family":"Brown","given":"G.K.","email":"","affiliations":[],"preferred":false,"id":441514,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70033545,"text":"70033545 - 2007 - Effects of pitfall trap preservative on collections of carabid beetles (Coleoptera: Carabidae)","interactions":[],"lastModifiedDate":"2012-03-12T17:21:33","indexId":"70033545","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1855,"text":"Great Lakes Entomologist","active":true,"publicationSubtype":{"id":10}},"title":"Effects of pitfall trap preservative on collections of carabid beetles (Coleoptera: Carabidae)","docAbstract":"Effects of six pitfall trap preservatives (5% acetic acid solution, distilled water, 70% ethanol, 50% ethylene glycol solution, 50% propylene glycol solution, and 10% saline solution) on collections of carabid beetles (Coleoptera: Carabidae) were studied in a west-central Illinois deciduous forest from May to October 2005. A total of 819 carabids, representing 33 species and 19 genera, were collected. Saline produced significantly fewer captures than did acetic acid, ethanol, ethylene glycol, and propylene glycol, while distilled water produced significantly fewer captures than did acetic acid. Significant associations between numbers of captures and treatment were seen in four species: Amphasia interstitialis (Say), Calathus opaculus LeConte, Chlaenius nemoralis Say, and Cyclotrachelus sodalis (LeConte). Results of this study suggest that type of preservative used can have substantial effects on abundance and species composition of carabids collected in pitfall traps.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Great Lakes Entomologist","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00900","usgsCitation":"McCravy, K., and Willand, J., 2007, Effects of pitfall trap preservative on collections of carabid beetles (Coleoptera: Carabidae): Great Lakes Entomologist, v. 40, no. 3-4, p. 154-165.","startPage":"154","endPage":"165","numberOfPages":"12","costCenters":[],"links":[{"id":242087,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"40","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0782e4b0c8380cd51720","contributors":{"authors":[{"text":"McCravy, K.W.","contributorId":90527,"corporation":false,"usgs":true,"family":"McCravy","given":"K.W.","email":"","affiliations":[],"preferred":false,"id":441386,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Willand, J.E.","contributorId":60838,"corporation":false,"usgs":true,"family":"Willand","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":441385,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70033407,"text":"70033407 - 2007 - Geothermometer calculations for geothermal assessment","interactions":[],"lastModifiedDate":"2023-06-30T11:09:52.84943","indexId":"70033407","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Geothermometer calculations for geothermal assessment","docAbstract":"Geothermal exploration programs have relied on the calculation of geothermometers from hot spring chemistry as an early estimation of geothermal reservoir temperatures. Calibration of the geothermometers has evolved from experimental determinations of mineral solubility as a function of temperature to calibration from analyses of water chemistry from known depths and temperatures in thermal wells. Most of the geothermometers were calibrated from analyses of sodium-chloride type waters, and the application of some geothermometers should be restricted to waters of the chemical types that were used in their calibration. Chemical analyses must be determined to be reliable before they are used to calculate geothermometers. The USGS Geothermal Resource Assessment will rely on the silica geothermometer developed by Giggenbach that approximates the transition between chalcedony at 20??C and quartz at 200??C. Above 200??C, the assessment will rely on the quartz geothermometer. In addition, the assessment will also rely on the potassium-magnesium geothermometer.","largerWorkTitle":"Transactions - Geothermal Resources Council","conferenceTitle":"Geothermal Resources Council - Annual Meeting of the Geothermal Resources Council 2007","conferenceDate":"September 20-October 7, 2007","conferenceLocation":"Reno, NV","language":"English","publisher":"Geothermal Resources Council","issn":"01935","usgsCitation":"Reed, M., and Mariner, R.H., 2007, Geothermometer calculations for geothermal assessment, <i>in</i> Transactions - Geothermal Resources Council, v. 31, Reno, NV, September 20-October 7, 2007, p. 89-92.","productDescription":"4 p.","startPage":"89","endPage":"92","numberOfPages":"4","costCenters":[],"links":[{"id":240736,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"31","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a28dee4b0c8380cd5a4ad","contributors":{"authors":[{"text":"Reed, M.J.","contributorId":35308,"corporation":false,"usgs":true,"family":"Reed","given":"M.J.","email":"","affiliations":[],"preferred":false,"id":440743,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mariner, Robert H.","contributorId":81075,"corporation":false,"usgs":true,"family":"Mariner","given":"Robert","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":440744,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70033382,"text":"70033382 - 2007 - Multi-channel resistivity investigations of the freshwater-saltwater interface: A new tool to study an old problem","interactions":[],"lastModifiedDate":"2023-06-21T11:17:16.154089","indexId":"70033382","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Multi-channel resistivity investigations of the freshwater-saltwater interface: A new tool to study an old problem","docAbstract":"It has been well established that fresh or brackish groundwater can exist both near and far from shore in many coastal and marine environments. The often permeable nature of marine sediments and the underlying bedrock provides abundant pathways for submarine groundwater discharge. While submarine groundwater discharge as a coastal hydrogeological phenomenon has been widely recognized, only recent advances in both geochemical tracers and geophysical tools have enabled a realistic, systematic quantification of the scales and rates of this coastal groundwater discharge. Here we present multichannel electrical resistivity results using both a time series, stationary cable that has 56 electrodes spaced 2 m apart, as well as a 120 m streaming resistivity cable that has two current-producing electrodes and eight potential electrodes spaced 10 m apart. As the cable position remains fixed in stationary mode, we can examine in high resolution tidal forcing on the freshwater-saltwater interface. Using a boat to conduct streaming resistivity surveys, relatively large spatial transects can be rapidly (travel speed -2-3 knots) acquired in shallow (-1-20 m) waters. Sediment formation factors, used to convert resistivity values to salinity, were calculated from porewater and sediment samples collected during the installation of an offshore well in Tampa Bay, Florida, USA. Here we examine the seabed resistivity from sites within Tampa Bay using both stationary and streaming configurations and discuss their overall effectiveness as a new tool to examine the dynamic nature of the freshwater-saltwater interface.","conferenceTitle":"International Symposium: A New Focus on Groundwater - Seawater Interactions - 24th General Assembly of the In","conferenceDate":"July 2-13, 2007","conferenceLocation":"Perugia","language":"English","publisher":"IAHS-AISH","issn":"01447","isbn":"9781901502046","usgsCitation":"Swarzenski, P., Kruse, S., Reich, C., and Swarzenski, W., 2007, Multi-channel resistivity investigations of the freshwater-saltwater interface: A new tool to study an old problem, International Symposium: A New Focus on Groundwater - Seawater Interactions - 24th General Assembly of the In, no. 312, Perugia, July 2-13, 2007, p. 100-106.","productDescription":"7 p.","startPage":"100","endPage":"106","numberOfPages":"7","costCenters":[],"links":[{"id":241173,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"312","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5f90e4b0c8380cd7101d","contributors":{"authors":[{"text":"Swarzenski, P.W. 0000-0003-0116-0578","orcid":"https://orcid.org/0000-0003-0116-0578","contributorId":29487,"corporation":false,"usgs":true,"family":"Swarzenski","given":"P.W.","affiliations":[],"preferred":false,"id":440595,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kruse, S.","contributorId":33103,"corporation":false,"usgs":true,"family":"Kruse","given":"S.","email":"","affiliations":[],"preferred":false,"id":440596,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Reich, C.","contributorId":41787,"corporation":false,"usgs":true,"family":"Reich","given":"C.","email":"","affiliations":[],"preferred":false,"id":440597,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Swarzenski, W.V.","contributorId":80243,"corporation":false,"usgs":true,"family":"Swarzenski","given":"W.V.","email":"","affiliations":[],"preferred":false,"id":440598,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70033344,"text":"70033344 - 2007 - Temporal variability of submarine groundwater discharge: Assessments via radon and seep meters, the southern carmel coast, Israel","interactions":[],"lastModifiedDate":"2012-03-12T17:21:35","indexId":"70033344","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Temporal variability of submarine groundwater discharge: Assessments via radon and seep meters, the southern carmel coast, Israel","docAbstract":"Seep meter data from Dor Bay, Israel, showed a steady decrease in submarine groundwater discharge (SGD) rates between March and July 2006 (averages of 34, 10.4 and 1.5 cm d-1 in March, May and July, respectively), while estimates based on radon time series showed remarkably uniform averages (8 cm d-1). The May seep meter data show a rough positive correlation with sea level, unlike the negative correlation shown by the Rn-calculated rates. Smaller-size meters, deployed in July adjacent to the regular-size ones, showed significantly higher rates (10 cm d-1), which negatively correlated with salinity. It is suggested that the decreased rates documented by the seep meters are the result of an increased shallow seawater recharge in the bay (due to decreasing hydraulic gradients). This is not captured by the radon, since recharging water is radon-poor. The positive correlation of discharge with sea level is due to increased seawater recycling in times of high sea stand. Copyright ?? 2007 IAHS Press.","largerWorkTitle":"IAHS-AISH Publication","conferenceTitle":"International Symposium: A New Focus on Groundwater - Seawater Interactions - 24th General Assembly of the In","conferenceDate":"2 July 2007 through 13 July 2007","conferenceLocation":"Perugia","language":"English","issn":"01447","isbn":"9781901502046","usgsCitation":"Weinstein, Y., Shalem, Y., Burnett, W.C., Swarzenski, P., and Herut, B., 2007, Temporal variability of submarine groundwater discharge: Assessments via radon and seep meters, the southern carmel coast, Israel, <i>in</i> IAHS-AISH Publication, no. 312, Perugia, 2 July 2007 through 13 July 2007, p. 125-133.","startPage":"125","endPage":"133","numberOfPages":"9","costCenters":[],"links":[{"id":240994,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"312","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba524e4b08c986b320836","contributors":{"authors":[{"text":"Weinstein, Y.","contributorId":100186,"corporation":false,"usgs":true,"family":"Weinstein","given":"Y.","email":"","affiliations":[],"preferred":false,"id":440426,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Shalem, Y.","contributorId":84971,"corporation":false,"usgs":true,"family":"Shalem","given":"Y.","affiliations":[],"preferred":false,"id":440425,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Burnett, W. C.","contributorId":39779,"corporation":false,"usgs":false,"family":"Burnett","given":"W.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":440424,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Swarzenski, P.W. 0000-0003-0116-0578","orcid":"https://orcid.org/0000-0003-0116-0578","contributorId":29487,"corporation":false,"usgs":true,"family":"Swarzenski","given":"P.W.","affiliations":[],"preferred":false,"id":440423,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Herut, B.","contributorId":101444,"corporation":false,"usgs":true,"family":"Herut","given":"B.","affiliations":[],"preferred":false,"id":440427,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"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, <i>in</i> 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":"<p><span>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.</span></p>","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":70033282,"text":"70033282 - 2007 - Sandhill crane abundance and nesting ecology at Grays Lake, Idaho","interactions":[],"lastModifiedDate":"2017-09-08T09:38:48","indexId":"70033282","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Sandhill crane abundance and nesting ecology at Grays Lake, Idaho","docAbstract":"We examined population size and factors influencing nest survival of greater sandhill cranes (Grus canadensis tabida) at Grays Lake National Wildlife Refuge, Idaho, USA, during 1997-2000. Average local population of cranes from late April to early May, 1998-2000, was 735 cranes, 34% higher than that reported for May 1970-1971. We estimated 228 (SE = 30) nests in the basin core (excluding renests), 14% higher than a 1971 estimate. Apparent nest success in our study (x?? = 60%, n = 519 nests) was lower than reported for Grays Lake 30-50 years earlier. Daily survival rates (DSRs) of all nests averaged 0.9707 (41.2%). The best model explaining nest survival included year and water depth and their interaction. Nest survival was highest (DSR = 0.9827) in 1998 compared with other years (0.9698-0.9707). Nest survival changed little relative to water depth in 1998, when flooding was extensive and alternative prey (microtines) irrupted, but declined markedly with lower water levels in 2000, the driest year studied. Hypotheses relating nest survival to vegetation height, land use (idle, summer grazing, fall grazing), and date were not supported. In a before-after-control-impact design using 12 experimental fields, nest survival differed among years but not among management treatments (idle, fall graze, fall burn, and summer-graze-idle rotation), nor was there an interaction between year and treatments. However, DSRs in fall-burn fields declined from 0.9781 in 1997-1998 to 0.9503 in 1999-2000 (posttreatment). Changes in the predator community have likely contributed to declines in nest success since the 1950s and 1970s. Our results did not support earlier concerns about effects of habitat management practices on crane productivity. Nest survival could best be enhanced by managing spring water levels. Managers should continue censuses during late April to evaluate long-term relationships to habitat conditions and management.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2193/2005-705","issn":"00225","usgsCitation":"Austin, J.E., Henry, A., and Ball, I., 2007, Sandhill crane abundance and nesting ecology at Grays Lake, Idaho: Journal of Wildlife Management, v. 71, no. 4, p. 1067-1079, https://doi.org/10.2193/2005-705.","productDescription":"13 p.","startPage":"1067","endPage":"1079","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":241167,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213537,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2193/2005-705"}],"geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -111.41647338867188,\n              43.000755398218224\n            ],\n            [\n              -111.38814926147461,\n              43.000755398218224\n            ],\n            [\n              -111.38814926147461,\n              43.0420453718909\n            ],\n            [\n              -111.41647338867188,\n              43.0420453718909\n            ],\n            [\n              -111.41647338867188,\n              43.000755398218224\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"71","issue":"4","noUsgsAuthors":false,"publicationDate":"2010-12-13","publicationStatus":"PW","scienceBaseUri":"505b86a6e4b08c986b316060","contributors":{"authors":[{"text":"Austin, J. E.","contributorId":5999,"corporation":false,"usgs":true,"family":"Austin","given":"J.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":440155,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Henry, A.R.","contributorId":107644,"corporation":false,"usgs":true,"family":"Henry","given":"A.R.","email":"","affiliations":[],"preferred":false,"id":440157,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ball, I.J.","contributorId":104427,"corporation":false,"usgs":true,"family":"Ball","given":"I.J.","affiliations":[],"preferred":false,"id":440156,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70033246,"text":"70033246 - 2007 - Landscape controls on mercury in streamwater at Acadia National Park, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:38","indexId":"70033246","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1552,"text":"Environmental Monitoring and Assessment","onlineIssn":"1573-2959","printIssn":"0167-6369","active":true,"publicationSubtype":{"id":10}},"title":"Landscape controls on mercury in streamwater at Acadia National Park, USA","docAbstract":"Fall and spring streamwater samples were analyzed for total mercury (Hg) and major ions from 47 locations on Mount Desert Island in Maine. Samples were collected in zones that were burned in a major wildfire in 1947 and in zones that were not burned. We hypothesized that Hg concentrations in streamwater would be higher from unburned sites than burned watersheds, because fire would volatilize stored Hg. The Hg concentrations, based on burn history, were not statistically distinct. However, significant statistical associations were noted between Hg and the amount of wetlands in the drainage systems and with streamwater dissolved organic carbon (DOC). An unexpected result was that wetlands mobilized more Hg by generating more DOC in total, but upland DOC was more efficient at transporting Hg because it transports more Hg per unit DOC. Mercury concentrations were higher in samples collected at lower elevations. Mercury was positively correlated with relative discharge, although this effect was not distinguished from the DOC association. In this research, sample site elevation and the presence of upstream wetlands and their associated DOC affected Hg concentrations more strongly than burn history. ?? Springer Science + Business Media B.V. 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Monitoring and Assessment","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10661-006-9334-2","issn":"01676369","usgsCitation":"Peckenham, J., Kahl, J.S., Nelson, S., Johnson, K., and Haines, T., 2007, Landscape controls on mercury in streamwater at Acadia National Park, USA: Environmental Monitoring and Assessment, v. 126, no. 1-3, p. 97-104, https://doi.org/10.1007/s10661-006-9334-2.","startPage":"97","endPage":"104","numberOfPages":"8","costCenters":[],"links":[{"id":213501,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10661-006-9334-2"},{"id":241130,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"126","issue":"1-3","noUsgsAuthors":false,"publicationDate":"2007-02-02","publicationStatus":"PW","scienceBaseUri":"505a4407e4b0c8380cd667bc","contributors":{"authors":[{"text":"Peckenham, J.M.","contributorId":98953,"corporation":false,"usgs":true,"family":"Peckenham","given":"J.M.","affiliations":[],"preferred":false,"id":440001,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kahl, J. S.","contributorId":77885,"corporation":false,"usgs":false,"family":"Kahl","given":"J.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":439999,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nelson, S.J.","contributorId":45901,"corporation":false,"usgs":true,"family":"Nelson","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":439998,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Johnson, K.B.","contributorId":31208,"corporation":false,"usgs":true,"family":"Johnson","given":"K.B.","email":"","affiliations":[],"preferred":false,"id":439997,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Haines, T.A.","contributorId":83062,"corporation":false,"usgs":true,"family":"Haines","given":"T.A.","email":"","affiliations":[],"preferred":false,"id":440000,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70030961,"text":"70030961 - 2007 - Reactivation of a cryptobiotic stream ecosystem in the McMurdo Dry Valleys, Antarctica: A long-term geomorphological experiment","interactions":[],"lastModifiedDate":"2012-03-12T17:21:16","indexId":"70030961","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1801,"text":"Geomorphology","active":true,"publicationSubtype":{"id":10}},"title":"Reactivation of a cryptobiotic stream ecosystem in the McMurdo Dry Valleys, Antarctica: A long-term geomorphological experiment","docAbstract":"The McMurdo Dry Valleys of Antarctica contain many glacial meltwater streams that flow for 6 to 12??weeks during the austral summer and link the glaciers to the lakes on the valley floors. Dry valley streams gain solutes longitudinally through weathering reactions and microbial processes occurring in the hyporheic zone. Some streams have thriving cyanobacterial mats. In streams with regular summer flow, the mats are freeze-dried through the winter and begin photosynthesizing with the onset of flow. To evaluate the longer term persistence of cyanobacterial mats, we diverted flow to an abandoned channel, which had not received substantial flow for approximately two decades. Monitoring of specific conductance showed that for the first 3??years after the diversion, the solute concentrations were greater in the reactivated channel than in most other dry valley streams. We observed that cyanobacterial mats became abundant in the reactivated channel within a week, indicating that the mats had been preserved in a cryptobiotic state in the channel. Over the next several years, these mats had high rates of productivity and nitrogen fixation compared to mats from other streams. Experiments in which mats from the reactivated channel and another stream were incubated in water from both of the streams indicated that the greater solute concentrations in the reactivated channel stimulated net primary productivity of mats from both streams. These stream-scale experimental results indicate that the cryptobiotic preservation of cyanobacterial mats in abandoned channels in the dry valleys allows for rapid response of these stream ecosystems to climatic and geomorphological change, similar to other arid zone stream ecosystems. ?? 2006 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geomorphology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.geomorph.2006.07.025","issn":"0169555X","usgsCitation":"McKnight, D.M., Tate, C.M., Andrews, E., Niyogi, D., Cozzetto, K., Welch, K., Lyons, W., and Capone, D., 2007, Reactivation of a cryptobiotic stream ecosystem in the McMurdo Dry Valleys, Antarctica: A long-term geomorphological experiment: Geomorphology, v. 89, no. 1-2 SPEC. ISS., p. 186-204, https://doi.org/10.1016/j.geomorph.2006.07.025.","startPage":"186","endPage":"204","numberOfPages":"19","costCenters":[],"links":[{"id":211332,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.geomorph.2006.07.025"},{"id":238603,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"89","issue":"1-2 SPEC. ISS.","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a9582e4b0c8380cd81a6b","contributors":{"authors":[{"text":"McKnight, Diane M.","contributorId":59773,"corporation":false,"usgs":false,"family":"McKnight","given":"Diane","email":"","middleInitial":"M.","affiliations":[{"id":16833,"text":"INSTAAR, University of Colorado","active":true,"usgs":false}],"preferred":false,"id":429406,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tate, C. M.","contributorId":97147,"corporation":false,"usgs":true,"family":"Tate","given":"C.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":429409,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Andrews, E.D.","contributorId":13922,"corporation":false,"usgs":true,"family":"Andrews","given":"E.D.","email":"","affiliations":[],"preferred":false,"id":429404,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Niyogi, D.K.","contributorId":103816,"corporation":false,"usgs":true,"family":"Niyogi","given":"D.K.","email":"","affiliations":[],"preferred":false,"id":429410,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Cozzetto, K.","contributorId":92868,"corporation":false,"usgs":true,"family":"Cozzetto","given":"K.","email":"","affiliations":[],"preferred":false,"id":429408,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Welch, K.","contributorId":20541,"corporation":false,"usgs":true,"family":"Welch","given":"K.","email":"","affiliations":[],"preferred":false,"id":429405,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Lyons, W.B.","contributorId":71319,"corporation":false,"usgs":true,"family":"Lyons","given":"W.B.","email":"","affiliations":[],"preferred":false,"id":429407,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Capone, D.G.","contributorId":105876,"corporation":false,"usgs":true,"family":"Capone","given":"D.G.","email":"","affiliations":[],"preferred":false,"id":429411,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70033223,"text":"70033223 - 2007 - The influence of major dams on hydrology through the drainage network of the Sacramento River basin, California","interactions":[],"lastModifiedDate":"2012-03-12T17:21:35","indexId":"70033223","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":"The influence of major dams on hydrology through the drainage network of the Sacramento River basin, California","docAbstract":"This paper reports basinwide patterns of hydrograph alteration via statistical and graphical analysis from a network of long-term streamflow gauges located various distances downstream of major dams and confluences in the Sacramento River basin in California, USA. Streamflow data from 10 gauging stations downstream of major dams were divided into hydrologic series corresponding to the periods before and after dam construction. Pre- and post-dam flows were compared with respect to hydrograph characteristics representing frequency, magnitude and shape: annual flood peak, annual flow trough, annual flood volume, time to flood peak, flood drawdown time and interarrival time. The use of such a suite of characteristics within a statistical and graphical framework allows for generalising distinct strategies of flood control operation that can be identified without any a priori knowledge of operations rules. Dam operation is highly dependent on the ratio of reservoir capacity to annual flood volume (impounded runoff index). Dams with high values of this index generally completely cut off flood peaks thus reducing time to peak, drawdown time and annual flood volume. Those with low values conduct early and late flow releases to extend the hydrograph, increasing time to peak, drawdown time and annual flood volume. The analyses reveal minimal flood control benefits from foothill dams in the lower Sacramento River (i.e. dissipation of the down-valley flood control signal). The lower part of the basin is instead reliant on a weir and bypass system to control lowland flooding. Data from a control gauge (i.e. with no upstream dams) suggest a background signature of global climate change expressed as shortened flood hydrograph falling limbs and lengthened flood interarrival times at low exceedence probabilities. This research has implications for flood control, water resource management, aquatic and riparian ecosystems and for rehabilitation strategies involving flow alteration and/or manipulation of sediment supplies. Copyright ?? 2006 John Wiley & Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"River Research and Applications","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/rra.968","issn":"15351459","usgsCitation":"Singer, M., 2007, The influence of major dams on hydrology through the drainage network of the Sacramento River basin, California: River Research and Applications, v. 23, no. 1, p. 55-72, https://doi.org/10.1002/rra.968.","startPage":"55","endPage":"72","numberOfPages":"18","costCenters":[],"links":[{"id":213187,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/rra.968"},{"id":240790,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-10-26","publicationStatus":"PW","scienceBaseUri":"505bad2de4b08c986b323a2a","contributors":{"authors":[{"text":"Singer, M.B.","contributorId":67274,"corporation":false,"usgs":true,"family":"Singer","given":"M.B.","email":"","affiliations":[],"preferred":false,"id":439906,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70033219,"text":"70033219 - 2007 - Impacts of waste from concentrated animal feeding operations on water quality","interactions":[],"lastModifiedDate":"2018-10-26T07:57:46","indexId":"70033219","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1542,"text":"Environmental Health Perspectives","active":true,"publicationSubtype":{"id":10}},"title":"Impacts of waste from concentrated animal feeding operations on water quality","docAbstract":"<p>Waste from agricultural livestock operations has been a long-standing concern with respect to contamination of water resources, particularly in terms of nutrient pollution. However, the recent growth of concentrated animal feeding operations (CAFOs) presents a greater risk to water quality because of both the increased volume of waste and to contaminants that may be present (e.g., antibiotics and other veterinary drugs) that may have both environmental and public health importance. Based on available data, generally accepted livestock waste management practices do not adequately or effectively protect water resources from contamination with excessive nutrients, microbial pathogens, and pharmaceuticals present in the waste. Impacts on surface water sources and wildlife have been documented in many agricultural areas in the United States. Potential impacts on human and environmental health from long-term inadvertent exposure to water contaminated with pharmaceuticals and other compounds are a growing public concern. This workgroup, which is part of the Conference on Environmental Health Impacts of Concentrated Animal Feeding Operations: Anticipating Hazards-Searching for Solutions, identified needs for rigorous ecosystem monitoring in the vicinity of CAFOs and for improved characterization of major toxicants affecting the environment and human health. Last, there is a need to promote and enforce best practices to minimize inputs of nutrients and toxicants from CAFOs into freshwater and marine ecosystems.</p>","language":"English","publisher":"National Institute of Environmental Health Sciences","doi":"10.1289/ehp.8839","issn":"00916765","usgsCitation":"Burkholder, J., Libra, B., Weyer, P., Heathcote, S., Kolpin, D., Thorne, P., and Wichman, M., 2007, Impacts of waste from concentrated animal feeding operations on water quality: Environmental Health Perspectives, v. 115, no. 2, p. 308-312, https://doi.org/10.1289/ehp.8839.","productDescription":"5 p.","startPage":"308","endPage":"312","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":351,"text":"Iowa Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":487774,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1289/ehp.8839","text":"Publisher Index Page"},{"id":240724,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"115","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3901e4b0c8380cd61781","contributors":{"authors":[{"text":"Burkholder, J.","contributorId":7091,"corporation":false,"usgs":true,"family":"Burkholder","given":"J.","email":"","affiliations":[],"preferred":false,"id":439880,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Libra, B.","contributorId":73016,"corporation":false,"usgs":true,"family":"Libra","given":"B.","email":"","affiliations":[],"preferred":false,"id":439885,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Weyer, P.","contributorId":76947,"corporation":false,"usgs":true,"family":"Weyer","given":"P.","email":"","affiliations":[],"preferred":false,"id":439886,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Heathcote, S.","contributorId":20163,"corporation":false,"usgs":true,"family":"Heathcote","given":"S.","email":"","affiliations":[],"preferred":false,"id":439882,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Kolpin, D.","contributorId":18128,"corporation":false,"usgs":true,"family":"Kolpin","given":"D.","email":"","affiliations":[],"preferred":false,"id":439881,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Thorne, P.S.","contributorId":31986,"corporation":false,"usgs":true,"family":"Thorne","given":"P.S.","email":"","affiliations":[],"preferred":false,"id":439883,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Wichman, M.","contributorId":49983,"corporation":false,"usgs":true,"family":"Wichman","given":"M.","affiliations":[],"preferred":false,"id":439884,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70033212,"text":"70033212 - 2007 - Thermal, chemical, and optical properties of Crater Lake, Oregon","interactions":[],"lastModifiedDate":"2017-11-15T09:58:12","indexId":"70033212","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":"Thermal, chemical, and optical properties of Crater Lake, Oregon","docAbstract":"Crater Lake covers the floor of the Mount Mazama caldera that formed 7700 years ago. The lake has a surface area of 53 km2 and a maximum depth of 594 m. There is no outlet stream and surface inflow is limited to small streams and springs. Owing to its great volume and heat, the lake is not covered by snow and ice in winter unlike other lakes in the Cascade Range. The lake is isothermal in winter except for a slight increase in temperature in the deep lake from hyperadiabatic processes and inflow of hydrothermal fluids. During winter and spring the water column mixes to a depth of about 200-250 m from wind energy and convection. Circulation of the deep lake occurs periodically in winter and spring when cold, near-surface waters sink to the lake bottom; a process that results in the upwelling of nutrients, especially nitrate-N, into the upper strata of the lake. Thermal stratification occurs in late summer and fall. The maximum thickness of the epilimnion is about 20 m and the metalimnion extends to a depth of about 100 m. Thus, most of the lake volume is a cold hypolimnion. The year-round near-bottom temperature is about 3.5??C. Overall, hydrothermal fluids define and temporally maintain the basic water quality characteristics of the lake (e.g., pH, alkalinity and conductivity). Total phosphorus and orthophosphate-P concentrations are fairly uniform throughout the water column, where as total Kjeldahl-N and ammonia-N are highest in concentration in the upper lake. Concentrations of nitrate-N increase with depth below 200 m. No long-term changes in water quality have been detected. Secchi disk (20-cm) clarity varied seasonally and annually, but was typically highest in June and lowest in August. During the current study, August Secchi disk clarity readings averaged about 30 m. The maximum individual clarity reading was 41.5 m in June 1997. The lowest reading was 18.1 m in July 1995. From 1896 (white-dinner plate) to 2003, the average August Secchi disk reading was about 30 m. No long-term changes in the Secchi disk clarity were observed. Average turbidity of the water column (2-550 m) between June and September from 1991 to 2000 as measured by a transmissometer ranged between 88.8% and 90.7%. The depth of 1% of the incident solar radiation during thermal stratification varied annually between 80 m and 100 m. Both of these measurements provided additional evidence about the exceptional clarity of Crater Lake. ?? 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/s10750-006-0346-2","issn":"00188158","usgsCitation":"Larson, G., Hoffman, R., McIntire, D.C., Buktenica, M., and Girdner, S., 2007, Thermal, chemical, and optical properties of Crater Lake, Oregon: Hydrobiologia, v. 574, no. 1, p. 69-84, https://doi.org/10.1007/s10750-006-0346-2.","startPage":"69","endPage":"84","numberOfPages":"16","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":241164,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213534,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10750-006-0346-2"}],"volume":"574","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb264e4b08c986b32578f","contributors":{"authors":[{"text":"Larson, G.L.","contributorId":103021,"corporation":false,"usgs":true,"family":"Larson","given":"G.L.","email":"","affiliations":[],"preferred":false,"id":439857,"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":439853,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McIntire, D. C.","contributorId":93710,"corporation":false,"usgs":true,"family":"McIntire","given":"D.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":439856,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Buktenica, M.W.","contributorId":68263,"corporation":false,"usgs":true,"family":"Buktenica","given":"M.W.","affiliations":[],"preferred":false,"id":439854,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Girdner, S.F.","contributorId":71773,"corporation":false,"usgs":true,"family":"Girdner","given":"S.F.","affiliations":[],"preferred":false,"id":439855,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70033194,"text":"70033194 - 2007 - Persistent mortality of brook trout in episodically acidified streams of the Southwestern Adirondack Mountains, New York","interactions":[],"lastModifiedDate":"2012-03-12T17:21:35","indexId":"70033194","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3624,"text":"Transactions of the American Fisheries Society","active":true,"publicationSubtype":{"id":10}},"title":"Persistent mortality of brook trout in episodically acidified streams of the Southwestern Adirondack Mountains, New York","docAbstract":"Water chemistry, discharge, and mortality of caged brook trout Salvelinus fontinalis were characterized in six headwater streams in the southwestern Adirondack Mountains of New York during spring 2001-2003. Results were compared with mortality recorded during similar tests during 1984-1985, 1988-1990, and 1997 to assess contemporary relations between stream acidification and brook trout mortality, the effects of exposure duration on mortality, and the effects of decreased rates of acidic deposition on water quality and fish mortality. Water quality and mortality of caged, young-of-the-year brook trout were evaluated during 30-d exposure periods from mid-April to late May during the most recent tests. In 2001-2003, mortality ranged from 0% to 100% and varied among streams and years, depending on the timing of toxicity tests in relation to the annual snowmelt and on the ability of each watershed to neutralize acids and prevent acutely toxic concentrations of inorganic monomeric aluminum (Alim) during high-flow events. Mortality rates in 2001-2003 tests were highly variable but similar to those observed during earlier tests. This similarity suggests that stream water quality in the southwestern Adirondack Mountains has not changed appreciably over the past 20 years. Concentrations of Alim greater than 2.0 and 4.0 ??mol/L were closely correlated with low and high mortality rates, respectively, and accounted for 83% of the variation in mortality. Two to four days of exposure to Alim concentrations greater than 4.0 ??mol/L resulted in 50-100% mortality. The extended periods (as long as 6 months) during which Alim concentrations exceeded 2.0 and 4.0 ??mol/L in one or more streams, combined with the low tolerance of many other fish species to acid and elevated Al concentrations, indicate a high potential for damage to fish communities in these and other poorly buffered streams of the Northeast. ?? Copyright by the American Fisheries Society 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Transactions of the American Fisheries Society","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1577/T06-043.1","issn":"00028487","usgsCitation":"Baldigo, B., Lawrence, G., and Simonin, H., 2007, Persistent mortality of brook trout in episodically acidified streams of the Southwestern Adirondack Mountains, New York: Transactions of the American Fisheries Society, v. 136, no. 1, p. 121-134, https://doi.org/10.1577/T06-043.1.","startPage":"121","endPage":"134","numberOfPages":"14","costCenters":[],"links":[{"id":213250,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/T06-043.1"},{"id":240856,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"136","issue":"1","noUsgsAuthors":false,"publicationDate":"2011-01-09","publicationStatus":"PW","scienceBaseUri":"505a76f9e4b0c8380cd783c3","contributors":{"authors":[{"text":"Baldigo, Barry P. 0000-0002-9862-9119","orcid":"https://orcid.org/0000-0002-9862-9119","contributorId":25174,"corporation":false,"usgs":true,"family":"Baldigo","given":"Barry P.","affiliations":[{"id":474,"text":"New York Water Science Center","active":true,"usgs":true}],"preferred":true,"id":439771,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lawrence, G.","contributorId":37541,"corporation":false,"usgs":true,"family":"Lawrence","given":"G.","email":"","affiliations":[],"preferred":false,"id":439772,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Simonin, H.","contributorId":74961,"corporation":false,"usgs":true,"family":"Simonin","given":"H.","affiliations":[],"preferred":false,"id":439773,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70033191,"text":"70033191 - 2007 - Associations of decadal to multidecadal sea-surface temperature variability with Upper Colorado River flow","interactions":[],"lastModifiedDate":"2012-03-12T17:21:34","indexId":"70033191","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":"Associations of decadal to multidecadal sea-surface temperature variability with Upper Colorado River flow","docAbstract":"The relations of decadal to multidecadal (D2M) variability in global sea-surface temperatures (SSTs) with D2M variability in the flow of the Upper Colorado River Basin (UCRB) are examined for the years 1906-2003. Results indicate that D2M variability of SSTs in the North Atlantic, North Pacific, tropical Pacific, and Indian Oceans is associated with D2M variability of the UCRB. A principal components analysis (with varimax rotation) of detrended and 11-year smoothed global SSTs indicates that the two leading rotated principal components (RPCs) explain 56% of the variability in the transformed SST data. The first RPC (RPC1) strongly reflects variability associated with the Atlantic Multidecadal Oscillation and the second RPC (RPC2) represents variability of the Pacific Decadal Oscillation, the tropical Pacific Ocean, and Indian Ocean SSTs. Results indicate that SSTs in the North Atlantic Ocean (RPC1) explain as much of the D2M variability in global SSTs as does the combination of Indian and Pacific Ocean variability (RPC2). These results suggest that SSTs in all of the oceans have some relation with flow of the UCRB, but the North Atlantic may have the strongest and most consistent association on D2M time scales. Hydroclimatic persistence on these time scales introduces significant nonstationarity in mean annual streamflow, with critical implications for UCRB water resource management. ?? 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.1752-1688.2007.00015.x","issn":"1093474X","usgsCitation":"McCabe, G., Betancourt, J., and Hidalgo, H., 2007, Associations of decadal to multidecadal sea-surface temperature variability with Upper Colorado River flow: Journal of the American Water Resources Association, v. 43, no. 1, p. 183-192, https://doi.org/10.1111/j.1752-1688.2007.00015.x.","startPage":"183","endPage":"192","numberOfPages":"10","costCenters":[],"links":[{"id":213216,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1752-1688.2007.00015.x"},{"id":240820,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-02-12","publicationStatus":"PW","scienceBaseUri":"5059ee95e4b0c8380cd49e3e","contributors":{"authors":[{"text":"McCabe, G.J. 0000-0002-9258-2997","orcid":"https://orcid.org/0000-0002-9258-2997","contributorId":12961,"corporation":false,"usgs":true,"family":"McCabe","given":"G.J.","affiliations":[],"preferred":false,"id":439761,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Betancourt, J.L. 0000-0002-7165-0743","orcid":"https://orcid.org/0000-0002-7165-0743","contributorId":87505,"corporation":false,"usgs":true,"family":"Betancourt","given":"J.L.","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":439763,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hidalgo, H.G.","contributorId":81229,"corporation":false,"usgs":true,"family":"Hidalgo","given":"H.G.","email":"","affiliations":[],"preferred":false,"id":439762,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70033185,"text":"70033185 - 2007 - Management of fluid mud in estuaries, bays, and lakes. II: Measurement, modeling, and management","interactions":[],"lastModifiedDate":"2018-06-01T13:49:54","indexId":"70033185","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":"Management of fluid mud in estuaries, bays, and lakes. II: Measurement, modeling, and management","docAbstract":"<div class=\"NLM_sec NLM_sec_level_1 hlFld-Abstract\"><p>Techniques for measurement, modeling, and management of fluid mud are available, but research is needed to improve them. Fluid mud can be difficult to detect, measure, or sample, which has led to new instruments and new ways of using existing instruments. Multifrequency acoustic fathometers sense neither density nor viscosity and are, therefore, unreliable in measuring fluid mud. Nuclear density probes, towed sleds, seismic, and drop probes equipped with density meters offer the potential for accurate measurements. Numerical modeling of fluid mud requires solving governing equations for flow velocity, density, pressure, salinity, water surface, plus sediment submodels. A number of such models exist in one-, two-, and three-dimensional form, but they rely on empirical relationships that require substantial site-specific validation to observations. Management of fluid mud techniques can be classified as those that accomplish: Source control, formation control, and removal. Nautical depth, a fourth category, defines the channel bottom as a specific fluid mud density or alternative parameter as safe for navigation. Source control includes watershed management measures to keep fine sediment out of waterways and in-water measures such as structures and traps. Formation control methods include streamlined channels and structures plus other measures to reduce flocculation and structures that train currents. Removal methods include the traditional dredging and transport of dredged material plus agitation that contributes to formation control and/or nautical depth. Conditioning of fluid mud by dredging and aerating offers the possibility of improved navigability. Two examples—the Atchafalaya Bar Channel and Savannah Harbor—illustrate the use of measurements and management of fluid mud.</p></div>","language":"English","publisher":"ASCE","doi":"10.1061/(ASCE)0733-9429(2007)133:1(23)","issn":"07339429","usgsCitation":"McAnally, W., Teeter, A., Schoellhamer, D., Friedrichs, C., Hamilton, D., Hayter, E., Shrestha, P., Rodriguez, H., Sheremet, A., and Kirby, R., 2007, Management of fluid mud in estuaries, bays, and lakes. II: Measurement, modeling, and management: Journal of Hydraulic Engineering, v. 133, no. 1, p. 23-38, https://doi.org/10.1061/(ASCE)0733-9429(2007)133:1(23).","productDescription":"16 p.","startPage":"23","endPage":"38","costCenters":[],"links":[{"id":240721,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213128,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1061/(ASCE)0733-9429(2007)133:1(23)"}],"volume":"133","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4c6fe4b0c8380cd69c6c","contributors":{"authors":[{"text":"McAnally, W.H.","contributorId":47168,"corporation":false,"usgs":true,"family":"McAnally","given":"W.H.","email":"","affiliations":[],"preferred":false,"id":439734,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Teeter, A.","contributorId":46770,"corporation":false,"usgs":true,"family":"Teeter","given":"A.","email":"","affiliations":[],"preferred":false,"id":439733,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schoellhamer, David H. 0000-0001-9488-7340 dschoell@usgs.gov","orcid":"https://orcid.org/0000-0001-9488-7340","contributorId":631,"corporation":false,"usgs":true,"family":"Schoellhamer","given":"David H.","email":"dschoell@usgs.gov","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":439739,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Friedrichs, C.","contributorId":28361,"corporation":false,"usgs":true,"family":"Friedrichs","given":"C.","email":"","affiliations":[],"preferred":false,"id":439732,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hamilton, D.","contributorId":54316,"corporation":false,"usgs":true,"family":"Hamilton","given":"D.","affiliations":[],"preferred":false,"id":439735,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Hayter, E.","contributorId":56858,"corporation":false,"usgs":true,"family":"Hayter","given":"E.","affiliations":[],"preferred":false,"id":439736,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Shrestha, P.","contributorId":59635,"corporation":false,"usgs":true,"family":"Shrestha","given":"P.","email":"","affiliations":[],"preferred":false,"id":439737,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Rodriguez, H.","contributorId":27267,"corporation":false,"usgs":true,"family":"Rodriguez","given":"H.","email":"","affiliations":[],"preferred":false,"id":439731,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Sheremet, A.","contributorId":79306,"corporation":false,"usgs":true,"family":"Sheremet","given":"A.","email":"","affiliations":[],"preferred":false,"id":439738,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Kirby, R.","contributorId":11833,"corporation":false,"usgs":true,"family":"Kirby","given":"R.","email":"","affiliations":[],"preferred":false,"id":439730,"contributorType":{"id":1,"text":"Authors"},"rank":10}]}}
,{"id":70033183,"text":"70033183 - 2007 - Multiobjective analysis of a public wellfield using artificial neural networks","interactions":[],"lastModifiedDate":"2012-03-12T17:21:23","indexId":"70033183","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":"Multiobjective analysis of a public wellfield using artificial neural networks","docAbstract":"As competition for increasingly scarce ground water resources grows, many decision makers may come to rely upon rigorous multiobjective techniques to help identify appropriate and defensible policies, particularly when disparate stakeholder groups are involved. In this study, decision analysis was conducted on a public water supply wellfield to balance water supply needs with well vulnerability to contamination from a nearby ground water contaminant plume. With few alternative water sources, decision makers must balance the conflicting objectives of maximizing water supply volume from noncontaminated wells while minimizing their vulnerability to contamination from the plume. Artificial neural networks (ANNs) were developed with simulation data from a numerical ground water flow model developed for the study area. The ANN-derived state transition equations were embedded into a multiobjective optimization model, from which the Pareto frontier or trade-off curve between water supply and wellfield vulnerability was identified. Relative preference values and power factors were assigned to the three stakeholders, namely the company whose waste contaminated the aquifer, the community supplied by the wells, and the water utility company that owns and operates the wells. A compromise pumping policy that effectively balances the two conflicting objectives in accordance with the preferences of the three stakeholder groups was then identified using various distance-based methods. ?? 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.1745-6584.2006.00248.x","issn":"0017467X","usgsCitation":"Coppola, E., Szidarovszky, F., Davis, D., Spayd, S., Poulton, M., and Roman, E., 2007, Multiobjective analysis of a public wellfield using artificial neural networks: Ground Water, v. 45, no. 1, p. 53-61, https://doi.org/10.1111/j.1745-6584.2006.00248.x.","startPage":"53","endPage":"61","numberOfPages":"9","costCenters":[],"links":[{"id":213591,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2006.00248.x"},{"id":241229,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-07-28","publicationStatus":"PW","scienceBaseUri":"505a6034e4b0c8380cd71379","contributors":{"authors":[{"text":"Coppola, E.A. Jr.","contributorId":51992,"corporation":false,"usgs":true,"family":"Coppola","given":"E.A.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":439723,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Szidarovszky, F.","contributorId":30457,"corporation":false,"usgs":true,"family":"Szidarovszky","given":"F.","email":"","affiliations":[],"preferred":false,"id":439721,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Davis, D.","contributorId":85747,"corporation":false,"usgs":true,"family":"Davis","given":"D.","affiliations":[],"preferred":false,"id":439726,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Spayd, S.","contributorId":77747,"corporation":false,"usgs":true,"family":"Spayd","given":"S.","email":"","affiliations":[],"preferred":false,"id":439725,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Poulton, M.M.","contributorId":42436,"corporation":false,"usgs":true,"family":"Poulton","given":"M.M.","email":"","affiliations":[],"preferred":false,"id":439722,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Roman, E.","contributorId":59250,"corporation":false,"usgs":true,"family":"Roman","given":"E.","email":"","affiliations":[],"preferred":false,"id":439724,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70033180,"text":"70033180 - 2007 - Acid rain effects on aluminum mobilization clarified by inclusion of strong organic acids","interactions":[],"lastModifiedDate":"2012-03-12T17:21:38","indexId":"70033180","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Acid rain effects on aluminum mobilization clarified by inclusion of strong organic acids","docAbstract":"Assessments of acidic deposition effects on aquatic ecosystems have often been hindered by complications from naturally occurring organic acidity. Measurements of pH and ANCG, the most commonly used indicators of chemical effects, can be substantially influenced by the presence of organic acids. Relationships between pH and inorganic Al, which is toxic to many forms of aquatic biota, are also altered by organic acids. However, when inorganic Al concentrations are plotted against ANC (the sum of Ca2+, Mg 2+, Na+, and K+, minus SO42-, NO3-, and Cl-), a distinct threshold for Al mobilization becomes apparent. If the concentration of strong organic anions is included as a negative component of ANC, the threshold occurs at an ANC value of approximately zero, the value expected from theoretical charge balance constraints. This adjusted ANC is termed the base-cation surplus. The threshold relationship between the base-cation surplus and Al was shown with data from approximately 200 streams in the Adirondack region of New York, during periods with low and high dissolved organic carbon concentrations, and for an additional stream from the Catskill region of New York. These results indicate that (1) strong organic anions can contribute to the mobilization of inorganic Al in combination with SO42- and NO 3-, and (2) the presence of inorganic Al in surface waters is an unambiguous indication of acidic deposition effects. ?? 2007 American Chemical Society.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Science and Technology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1021/es061437v","issn":"0013936X","usgsCitation":"Lawrence, G., Sutherland, J., Boylen, C., Nierzwicki-Bauer, S.W., Momen, B., Baldigo, B., and Simonin, H.A., 2007, Acid rain effects on aluminum mobilization clarified by inclusion of strong organic acids: Environmental Science & Technology, v. 41, no. 1, p. 93-98, https://doi.org/10.1021/es061437v.","startPage":"93","endPage":"98","numberOfPages":"6","costCenters":[],"links":[{"id":213533,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/es061437v"},{"id":241163,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"41","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-11-21","publicationStatus":"PW","scienceBaseUri":"5059e693e4b0c8380cd474f3","contributors":{"authors":[{"text":"Lawrence, G.B. 0000-0002-8035-2350","orcid":"https://orcid.org/0000-0002-8035-2350","contributorId":76347,"corporation":false,"usgs":true,"family":"Lawrence","given":"G.B.","affiliations":[],"preferred":false,"id":439713,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sutherland, J.W.","contributorId":61622,"corporation":false,"usgs":true,"family":"Sutherland","given":"J.W.","email":"","affiliations":[],"preferred":false,"id":439712,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Boylen, C.W.","contributorId":43151,"corporation":false,"usgs":true,"family":"Boylen","given":"C.W.","email":"","affiliations":[],"preferred":false,"id":439711,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nierzwicki-Bauer, S. W.","contributorId":27683,"corporation":false,"usgs":true,"family":"Nierzwicki-Bauer","given":"S.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":439710,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Momen, B.","contributorId":91283,"corporation":false,"usgs":true,"family":"Momen","given":"B.","affiliations":[],"preferred":false,"id":439715,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Baldigo, Barry P. 0000-0002-9862-9119","orcid":"https://orcid.org/0000-0002-9862-9119","contributorId":25174,"corporation":false,"usgs":true,"family":"Baldigo","given":"Barry P.","affiliations":[{"id":474,"text":"New York Water Science Center","active":true,"usgs":true}],"preferred":true,"id":439709,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Simonin, H. A.","contributorId":85713,"corporation":false,"usgs":false,"family":"Simonin","given":"H.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":439714,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70035411,"text":"70035411 - 2007 - Origin and emplacement of impactites in the Chesapeake Bay impact structure, Virginia, USA","interactions":[],"lastModifiedDate":"2020-03-27T06:44:51","indexId":"70035411","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Origin and emplacement of impactites in the Chesapeake Bay impact structure, Virginia, USA","docAbstract":"<div class=\"book-chapter-body\"><div id=\"ContentTab\" class=\"content active\"><div class=\"widget widget-BookSectionsText widget-instance-BookChaptertext\"><div class=\"module-widget\"><div class=\"widget-items\" data-widgetname=\"BookSectionsText\"><div class=\"category-section clearfix content-section \"><p>The late Eocene Chesapeake Bay impact structure, located on the Atlantic margin of Virginia, may be Earth's best-preserved large impact structure formed in a shallow marine, siliciclastic, continental-shelf environment. It has the form of an inverted sombrero in which a central crater ∼40 km in diameter is surrounded by a shallower brim, the annular trough, that extends the diameter to ∼85 km. The annular trough is interpreted to have formed largely by the collapse and mobilization of weak sediments. Crystalline-clast suevite, found only in the central crater, contains clasts and blocks of shocked gneiss that likely were derived from the fragmentation of the central-uplift basement. The suevite and entrained megablocks are interpreted to have formed from impact-melt particles and crystalline-rock debris that never left the central crater, rather than as a fallback deposit. Impact-modified sediments in the annular trough include megablocks of Cretaceous nonmarine sediment disrupted by faults, fluidized sands, fractured clays, and mixed-sediment intercalations. These impact-modified sediments could have formed by a combination of processes, including ejection into and mixing of sediments in the water column, rarefaction-induced fragmentation and clastic injection, liquefaction and fluidization of sand in response to acousticwave vibrations, gravitational collapse, and inward lateral spreading. The Exmore beds, which blanket the entire crater and nearby areas, consist of a lower diamicton member overlain by an upper stratified member. They are interpreted as unstratified ocean-resurge deposits, having depositional cycles that may represent stages of inward resurge or outward anti-resurge flow, overlain by stratified fallout of suspended sediment from the water column.</p></div></div></div></div></div></div>","language":"English","publisher":"Geological Society of America","doi":"10.1130/2008.2437(06)","issn":"00721077","usgsCitation":"Horton,, J., Gohn, G., Powars, D.S., and Edwards, L.E., 2007, Origin and emplacement of impactites in the Chesapeake Bay impact structure, Virginia, USA: Special Paper of the Geological Society of America, no. 437, p. 73-97, https://doi.org/10.1130/2008.2437(06).","productDescription":"25 p.","startPage":"73","endPage":"97","numberOfPages":"25","costCenters":[{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true},{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true}],"links":[{"id":243112,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"Chesapeake Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -77.54150390625,\n              36.73888412439431\n            ],\n            [\n              -75.157470703125,\n              36.73888412439431\n            ],\n            [\n              -75.157470703125,\n              39.70718665682654\n            ],\n            [\n              -77.54150390625,\n              39.70718665682654\n            ],\n            [\n              -77.54150390625,\n              36.73888412439431\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","issue":"437","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a70a4e4b0c8380cd76159","contributors":{"authors":[{"text":"Horton,, J. Wright Jr. 0000-0001-6756-6365","orcid":"https://orcid.org/0000-0001-6756-6365","contributorId":219824,"corporation":false,"usgs":true,"family":"Horton,","given":"J. Wright","suffix":"Jr.","affiliations":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true}],"preferred":true,"id":450538,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gohn, Gregory 0000-0003-2000-479X ggohn@usgs.gov","orcid":"https://orcid.org/0000-0003-2000-479X","contributorId":219822,"corporation":false,"usgs":true,"family":"Gohn","given":"Gregory","email":"ggohn@usgs.gov","affiliations":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true},{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"preferred":true,"id":450537,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Powars, David S. 0000-0002-6787-8964 dspowars@usgs.gov","orcid":"https://orcid.org/0000-0002-6787-8964","contributorId":1181,"corporation":false,"usgs":true,"family":"Powars","given":"David","email":"dspowars@usgs.gov","middleInitial":"S.","affiliations":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true},{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"preferred":true,"id":450536,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Edwards, Lucy E. 0000-0003-4075-3317 leedward@usgs.gov","orcid":"https://orcid.org/0000-0003-4075-3317","contributorId":2647,"corporation":false,"usgs":true,"family":"Edwards","given":"Lucy","email":"leedward@usgs.gov","middleInitial":"E.","affiliations":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true},{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"preferred":true,"id":450535,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"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}]}}
]}