{"pageNumber":"386","pageRowStart":"9625","pageSize":"25","recordCount":16506,"records":[{"id":4287,"text":"cir1174 - 1998 - Estimating areas contributing recharge to wells, lessons from previous studies","interactions":[],"lastModifiedDate":"2012-02-02T00:05:26","indexId":"cir1174","displayToPublicDate":"1998-05-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":307,"text":"Circular","code":"CIR","onlineIssn":"2330-5703","printIssn":"1067-084X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"1174","title":"Estimating areas contributing recharge to wells, lessons from previous studies","docAbstract":"Factors relating to the estimation of areas contributing recharge to wells, such as complexity of the ground-water flow system, effects of changing hydrologic conditions, and effects of well-screen locations and pumping rates, are reviewed. The point of view that simulation is the best means to obtain physically based estimates of contributing areas is emphasized. An extensive list of USGS reports that include estimation of contributing areas is provided.","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/cir1174","usgsCitation":"Franke, O.L., Reilly, T.E., Pollock, D., and LaBaugh, J.W., 1998, Estimating areas contributing recharge to wells, lessons from previous studies: U.S. Geological Survey Circular 1174, 14 p. :col. ill. ;28 cm., https://doi.org/10.3133/cir1174.","productDescription":"14 p. :col. ill. ;28 cm.","costCenters":[],"links":[{"id":39,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://water.usgs.gov/ogw/pubs/Circ1174/","linkFileType":{"id":5,"text":"html"}},{"id":122120,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/circ/1998/1174/report-thumb.jpg"},{"id":31398,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/circ/1998/1174/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a0ce4b07f02db5fc97e","contributors":{"authors":[{"text":"Franke, O. Lehn","contributorId":63357,"corporation":false,"usgs":true,"family":"Franke","given":"O.","email":"","middleInitial":"Lehn","affiliations":[],"preferred":false,"id":148726,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Reilly, T. E.","contributorId":79460,"corporation":false,"usgs":true,"family":"Reilly","given":"T.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":148727,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pollock, D.W.","contributorId":30967,"corporation":false,"usgs":true,"family":"Pollock","given":"D.W.","email":"","affiliations":[],"preferred":false,"id":148725,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"LaBaugh, J. W.","contributorId":23484,"corporation":false,"usgs":true,"family":"LaBaugh","given":"J.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":148724,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":6922,"text":"fs16097 - 1998 - Low-flow water-quality characterization of the Gore Creek watershed, upper Colorado River basin, Colorado, August 1996","interactions":[],"lastModifiedDate":"2012-02-02T00:05:47","indexId":"fs16097","displayToPublicDate":"1998-04-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":313,"text":"Fact Sheet","code":"FS","onlineIssn":"2327-6932","printIssn":"2327-6916","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"160-97","title":"Low-flow water-quality characterization of the Gore Creek watershed, upper Colorado River basin, Colorado, August 1996","docAbstract":"The Upper Colorado River Basin (UCOL) is one of 59 National Water-Quality Assessment (NAWQA) study units designed to assess the status and trends of the Nation?s water quality (Leahy and others, 1990). The UCOL study unit began operation in 1994, and surface-water-quality data collection at a network of 14 sites began in October 1995 (Apodaca and others, 1996; Spahr and others, 1996). Gore Creek, which flows through Vail, Colorado, originates in pristine alpine headwaters and is designated a gold-medal trout fishery. The creek drains an area of about 102 square miles and is a tributary to the Eagle River. Gore Creek at the mouth near Minturn (site 13 in fig. 1) is one of the 14 sites in the UCOL network. This site was selected to evaluate water quality resulting from urban development and recreational land use. The Gore Creek watershed has undergone rapid land-use changes since the 1960?s as the Vail area shifted from traditional mountain ranchlands to a four-season resort community. Residential, recreational, commercial, and transportation development continues near Gore Creek and its tributaries to support the increasing permanent and tourist population of the area. Interstate 70 runs through the watershed from Vail Pass near site 14, along the eastern side of Black Gore Creek, and along the northern side of the main stem of Gore Creek to the mouth of the watershed (fig. 1). A major local concern is how increasing urbanization/recreation affects the water quality, gold-medal trout fishery, and aesthetic values of Gore Creek. An evaluation of the spatial characteristics of water quality in the watershed upstream from site 13 at the mouth of Gore Creek (fig. 1) can provide local water and land managers with information necessary to establish water policy and make land-use planning decisions to maintain or improve water quality. Historical data collected at the mouth of Gore Creek provide information about water quality resulting from land use, but a synoptic sampling is needed to determine the distribution and sources of water-quality constituents at one point in time. In August 1996, a low-flow synoptic sampling for analyses of water-quality properties and constituents at sites in the Gore Creek watershed was done by the U.S. Geological Survey, in cooperation with the Town of Vail, Eagle River Water and Sanitation District, Upper Eagle River Water Authority, and Northwest Colorado Council of Governments, to evaluate the water quality of Gore Creek. The August low-flow period can be important from water-quality and stream ecology perspectives. There is less water available to dilute any contaminants entering the streams, and stream temperatures are highest during August. Physical habitat for aquatic plants and animals is smaller than during most other times of the year. To address these more extreme water-quality and ecological conditions, the synoptic sampling was conducted during the summer low-flow period. Specific objectives of this sampling included: 1. Establish a current data set representing the spatial characteristics of low-flow water-quality conditions in the Gore Creek watershed, and 2. Develop some understanding of land-use and water-quality relations in the watershed. This fact sheet presents hydrologic background information and an analysis of general water-quality properties and constituents, trace elements, and nutrients collected in water samples during low-flow synoptic sampling of the Gore Creek watershed. The U.S. Geological Survey also is conducting a study of the algae and macroinvertebrate communities and physical habitat of streams in the Gore Creek watershed during low flow. This study is designed to provide information about land-use and stream ecology relations in the watershed.","language":"ENGLISH","publisher":"U.S. Dept. of the Interior, U.S. Geological Survey :\r\nNational Water-Quality Assessment,","doi":"10.3133/fs16097","usgsCitation":"Wynn, K.H., and Spahr, N.E., 1998, Low-flow water-quality characterization of the Gore Creek watershed, upper Colorado River basin, Colorado, August 1996: U.S. Geological Survey Fact Sheet 160-97, [4] p. : col. ill., col. map ; 28 cm. col. ill., col. map ;, https://doi.org/10.3133/fs16097.","productDescription":"[4] p. : col. ill., col. map ; 28 cm. col. ill., col. map ;","costCenters":[],"links":[{"id":703,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.water.usgs.gov/fs-160-97/","linkFileType":{"id":5,"text":"html"}},{"id":125127,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/fs/1997/0160/report-thumb.jpg"},{"id":34213,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/fs/1997/0160/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a7fe4b07f02db6487ea","contributors":{"authors":[{"text":"Wynn, Kirby H.","contributorId":37316,"corporation":false,"usgs":true,"family":"Wynn","given":"Kirby","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":153570,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Spahr, Norman E. nspahr@usgs.gov","contributorId":1977,"corporation":false,"usgs":true,"family":"Spahr","given":"Norman","email":"nspahr@usgs.gov","middleInitial":"E.","affiliations":[],"preferred":true,"id":153569,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":4950,"text":"fs01198 - 1998 - USGS Mineral Resources Program: International Activities","interactions":[],"lastModifiedDate":"2017-02-23T14:52:37","indexId":"fs01198","displayToPublicDate":"1998-04-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":313,"text":"Fact Sheet","code":"FS","onlineIssn":"2327-6932","printIssn":"2327-6916","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"011-98","title":"USGS Mineral Resources Program: International Activities","docAbstract":"<p>The USGS is the country's leading earth science organization. Since 1879, USGS scientists have gathered and analyzed data and disseminated the results of their research on the geology, cartography, hydrology, and, more recently biology, of every continent and ocean on Earth. Multidisciplinary research both in the United States and in the international arena has been an important part of the USGS mission. The USGS Mineral Resources Program is the sole Federal agency program that provides high-quality scientific information, objective resource assessments, and unbiased research results on mineral issues</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/fs01198","usgsCitation":"Kropschot, S., 1998, USGS Mineral Resources Program: International Activities: U.S. Geological Survey Fact Sheet 011-98, 1 folded sheet, https://doi.org/10.3133/fs01198.","productDescription":"1 folded sheet","costCenters":[],"links":[{"id":117986,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/fs_011_98.jpg"},{"id":118,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/fs/fs-0011-98/fs-0011-98.html","linkFileType":{"id":5,"text":"html"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a29e4b07f02db6117d6","contributors":{"authors":[{"text":"Kropschot, S.J.","contributorId":8456,"corporation":false,"usgs":true,"family":"Kropschot","given":"S.J.","affiliations":[],"preferred":false,"id":150189,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70185262,"text":"70185262 - 1998 - Anaerobic oxidation of [1,2-14C]Dichloroethene under Mn(IV)-reducing conditions","interactions":[],"lastModifiedDate":"2023-01-12T20:34:33.643418","indexId":"70185262","displayToPublicDate":"1998-04-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":850,"text":"Applied and Environmental Microbiology","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Anaerobic oxidation of [1,2-<sup>14</sup>C]Dichloroethene under Mn(IV)-reducing conditions","title":"Anaerobic oxidation of [1,2-14C]Dichloroethene under Mn(IV)-reducing conditions","docAbstract":"<p><span>Anaerobic oxidation of [1,2-</span><sup>14</sup><span>C]dichloroethene to</span><sup>14</sup><span>CO</span><sub>2</sub><span>&nbsp;under Mn(IV)-reducing conditions was demonstrated. The results indicate that oxidative degradation of partially chlorinated solvents like dichloroethene can be significant even under anoxic conditions and demonstrate the potential importance of Mn(IV) reduction for remediation of chlorinated groundwater contaminants.</span></p>","language":"English","publisher":"American Society for Microbiology","doi":"10.1128/AEM.64.4.1560-1562.1998","usgsCitation":"Bradley, P.M., Landmeyer, J., and Dinicola, R., 1998, Anaerobic oxidation of [1,2-14C]Dichloroethene under Mn(IV)-reducing conditions: Applied and Environmental Microbiology, v. 64, no. 4, p. 1560-1562, https://doi.org/10.1128/AEM.64.4.1560-1562.1998.","productDescription":"3 p.","startPage":"1560","endPage":"1562","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":479710,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1128/aem.64.4.1560-1562.1998","text":"Publisher Index Page"},{"id":337798,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Washington","city":"Keyport","otherGeospatial":"Naval Undersea Warfare Center","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -122.62530585214787,\n              47.69933861398715\n            ],\n            [\n              -122.62534876749243,\n              47.694652373430046\n            ],\n            [\n              -122.62573500559023,\n              47.69412662596039\n            ],\n            [\n              -122.62575646326243,\n              47.69365000779615\n            ],\n            [\n              -122.62541314050863,\n              47.69318782844567\n            ],\n            [\n              -122.62530585214787,\n  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     }\n    }\n  ]\n}","volume":"64","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58ccf59fe4b0849ce97f0cf2","contributors":{"authors":[{"text":"Bradley, Paul M. 0000-0001-7522-8606 pbradley@usgs.gov","orcid":"https://orcid.org/0000-0001-7522-8606","contributorId":361,"corporation":false,"usgs":true,"family":"Bradley","given":"Paul","email":"pbradley@usgs.gov","middleInitial":"M.","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"preferred":true,"id":684922,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Landmeyer, James 0000-0002-5640-3816 jlandmey@usgs.gov","orcid":"https://orcid.org/0000-0002-5640-3816","contributorId":3257,"corporation":false,"usgs":true,"family":"Landmeyer","given":"James","email":"jlandmey@usgs.gov","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"preferred":true,"id":684923,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Dinicola, Richard S. 0000-0003-4222-294X dinicola@usgs.gov","orcid":"https://orcid.org/0000-0003-4222-294X","contributorId":352,"corporation":false,"usgs":true,"family":"Dinicola","given":"Richard S.","email":"dinicola@usgs.gov","affiliations":[{"id":622,"text":"Washington Water Science Center","active":true,"usgs":true}],"preferred":true,"id":684924,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70181805,"text":"70181805 - 1998 - Intercomparison of principal hydrometric instruments; Third phase, Evaluation of ultrasonic velocity meters for flow measurement in streams, canals, and estuaries","interactions":[],"lastModifiedDate":"2017-02-14T13:27:48","indexId":"70181805","displayToPublicDate":"1998-03-10T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":4,"text":"Other Government Series"},"title":"Intercomparison of principal hydrometric instruments; Third phase, Evaluation of ultrasonic velocity meters for flow measurement in streams, canals, and estuaries","docAbstract":"<p><span>As part of the World Meteorological Organization (</span><span class=\"searchword\">WMO</span><span>) project </span><span class=\"searchword\">Intercomparison</span><span> of </span><span class=\"searchword\">Principal</span> <span class=\"searchword\">Hydrometric</span> <span class=\"searchword\">Instruments</span><span>, </span><span class=\"searchword\">Third</span> <span class=\"searchword\">Phase</span><span>, a questionnaire was prepared by the U.S. Geological Survey (USGS) on the application of </span><span class=\"searchword\">Ultrasonic</span> <span class=\"searchword\">Velocity</span> <span class=\"searchword\">Meters</span><span> (UVM's) for </span><span class=\"searchword\">flow</span><span class=\"searchword\">measurement</span><span> in </span><span class=\"searchword\">streams</span><span>, </span><span class=\"searchword\">canals</span><span>, and </span><span class=\"searchword\">estuaries</span><span>. In 1996, this questionnaire was distributed internationally by the </span><span class=\"searchword\">WMO</span><span> and USGS, and distributed within the United States by the USGS. Completed questionnaires were returned by 26 agencies in 7 countries (Canada, France, Germany, The Netherlands, Switzerland, the United Kingdom, and the United States). The completed questionnaires described geometric and streamflow conditions, system configurations, and reasons for applying UVM systems for 260 sites, thus providing information on the applicability of UVM systems throughout the world. The completed questionnaires also provided information on operational issues such as (1) methods used to determine and verify UVM ratings, (2) methods used to determine the mean flow velocity for UVM systems, (3) operational reliability of UVM systems, (4) methods to estimate missing data, (5) common problems with UVM systems and guidelines to mitigate these problems, and (6) personnel training issues. The completed questionnaires also described a few unique or novel applications of UVM systems. In addition to summarizing the completed questionnaires, this report includes a brief overview of UVM application and operation, and a short summary of current (1998) information from UVM system manufacturers regarding system cost and capabilities. On the basis of the information from the completed questionnaires and provided by the manufacturers, the general applicability of UVM systems is discussed. In the finalisation of this report the financial support provided by the US National Committee for Scientific Hydrology is gratefully acknowledged.</span></p>","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"WMO/TD","largerWorkSubtype":{"id":4,"text":"Other Government Series"},"language":"English","publisher":"World Meteorological Organization","publisherLocation":"Geneva, Switzerland","usgsCitation":"Melching, C.S., and Meno, M.W., 1998, Intercomparison of principal hydrometric instruments; Third phase, Evaluation of ultrasonic velocity meters for flow measurement in streams, canals, and estuaries.","costCenters":[],"links":[{"id":335363,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58a4253be4b0c825128ad481","contributors":{"authors":[{"text":"Melching, Charles S.","contributorId":8135,"corporation":false,"usgs":true,"family":"Melching","given":"Charles","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":668648,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Meno, Michael W.","contributorId":181570,"corporation":false,"usgs":false,"family":"Meno","given":"Michael","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":668649,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70021897,"text":"70021897 - 1998 - Effects of reservoir hydrology on reproduction by largemouth bass and spotted bass in Normandy Reservoir, Tennessee","interactions":[],"lastModifiedDate":"2025-03-21T17:08:24.516951","indexId":"70021897","displayToPublicDate":"1998-03-04T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2886,"text":"North American Journal of Fisheries Management","active":true,"publicationSubtype":{"id":10}},"title":"Effects of reservoir hydrology on reproduction by largemouth bass and spotted bass in Normandy Reservoir, Tennessee","docAbstract":"<p><span>Age-0 largemouth bass <i>Micropterus salmoides</i> and spotted bass <i>M. punctulatus</i> were collected from Normandy Reservoir, Tennessee, 1992–1996, to evaluate effects of reservoir hydrology and hatching of shad <i>Dorosoma</i> spp. on hatching and first-year growth and survival of these two species. Fish were collected in cove rotenone samples in early Aug and electrofishing samples biweekly throughout the summer; hatch dates and age-specific growth for both species were determined from cove samples with sagittal otoliths. Hatching of both species ranged from early April to early Jun. Initiation of largemouth bass spawning, but not spotted bass spawning, was positively related to the first day water levels achieved full pool. Mean hatch dates of both species were positively related to the first day of full pool. Timing of spawning for both species was not related to water temperature. Largemouth bass exhibited bimodal length-frequency distributions by midsummer in two wet years and length frequencies were unimodal in dry years; spotted bass always formed unimodal length-frequency distributions. When largemouth bass exhibited bimodal length distributions, earlier hatched fish grew faster than later hatched fish. Spotted bass grew at similar rates, regardless of hatch date, every year except during 1992 when later hatched fish grew faster than earlier hatched fish. Weekly survival of largemouth bass in their first summer was positively related to reservoir water level. First-year growth of both species was not directly affected by the timing of threadfin shad <i>D. petenense</i> or gizzard shad <i>D. cepedianum</i> hatching.</span></p>","language":"English","publisher":"Taylor & Francis","doi":"10.1577/1548-8675(1999)019<0078:EORHOR>2.0.CO;2","usgsCitation":"Sammons, S.M., Dorsey, L., Bettoli, P.W., and Fiss, F., 1998, Effects of reservoir hydrology on reproduction by largemouth bass and spotted bass in Normandy Reservoir, Tennessee: North American Journal of Fisheries Management, v. 19, no. 1, p. 78-88, https://doi.org/10.1577/1548-8675(1999)019<0078:EORHOR>2.0.CO;2.","productDescription":"11 p.","startPage":"78","endPage":"88","costCenters":[],"links":[{"id":229307,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Tennessee","otherGeospatial":"Normandy Reservoir","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -86.25345737877723,\n              35.479504714136354\n            ],\n            [\n              -86.25345737877723,\n              35.461933957547686\n            ],\n            [\n              -86.23064827344872,\n              35.461933957547686\n            ],\n            [\n              -86.23064827344872,\n              35.479504714136354\n            ],\n            [\n              -86.25345737877723,\n              35.479504714136354\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"19","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a07b0e4b0c8380cd517a5","contributors":{"authors":[{"text":"Sammons, Steven M.","contributorId":205417,"corporation":false,"usgs":false,"family":"Sammons","given":"Steven","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":391602,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dorsey, L.G.","contributorId":68479,"corporation":false,"usgs":true,"family":"Dorsey","given":"L.G.","email":"","affiliations":[],"preferred":false,"id":391600,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bettoli, Phillip William pbettoli@usgs.gov","contributorId":1919,"corporation":false,"usgs":true,"family":"Bettoli","given":"Phillip","email":"pbettoli@usgs.gov","middleInitial":"William","affiliations":[{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true}],"preferred":true,"id":391601,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Fiss, F.C.","contributorId":52352,"corporation":false,"usgs":true,"family":"Fiss","given":"F.C.","email":"","affiliations":[],"preferred":false,"id":391599,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70210058,"text":"70210058 - 1998 - Geographic trend in mercury measured in common loon feathers and blood","interactions":[],"lastModifiedDate":"2020-05-12T18:43:56.981064","indexId":"70210058","displayToPublicDate":"1998-02-28T13:31:13","publicationYear":"1998","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":"Geographic trend in mercury measured in common loon feathers and blood","docAbstract":"<p><span>The common loon (</span><i>Gavia immer</i><span>) is a high‐trophic‐level, long‐lived, obligate piscivore at risk from elevated levels of Hg through biomagnification and bioaccumulation. From 1991 to 1996 feather (</span><i>n</i><span>&nbsp;= 455) and blood (</span><i>n</i><span>&nbsp;= 381) samples from adult loons were collected between June and September in five regions of North America: Alaska, northwestern United States, Upper Great Lakes, New England, and the Canadian Maritimes. Concentrations of Hg in adults ranged from 2.8 to 36.7 μg/g (fresh weight) in feathers and from 0.12 to 7.80 μg/g (wet weight) in whole blood. Blood Hg concentrations in 3 to 6‐week‐old juveniles ranged from 0.03 to 0.78 μg/g (wet weight) (</span><i>n</i><span>&nbsp;= 183). To better interpret exposure data, relationships between blood and feather Hg concentrations were examined among age and sex classes. Blood and feather Hg concentrations from the same individuals were significantly correlated and varied geographically (</span><i>r</i><sup>2</sup><span>&nbsp;ranged from 0.03 to 0.48). Blood and feather Hg correlated strongest in areas with the highest blood Hg levels, indicating a possible carryover of breeding season Hg that is depurated during winter remigial molt. Mean blood and feather Hg concentrations in males were significantly higher than concentrations in females for each region. The mean blood Hg concentration in adults was 10 times higher than that in juveniles, and feather Hg concentrations significantly increased over 1 to 4‐year periods in recaptured individuals. Geographic stratification indicates a significant increasing regional trend in adult and juvenile blood Hg concentrations from west to east. This gradient resembles U.S. Environmental Protection Agency‐modeled predictions of total anthropogenic Hg deposition across the United States. This gradient is clearest across regions. Within‐region blood Hg concentrations in adults and juveniles across nine sites of one region, the Upper Great Lakes, were less influenced by variations in geographic Hg deposition than by hydrology and lake chemistry. Loons breeding on low‐pH lakes in the Upper Great Lakes and in all lake types of northeastern North America are most at risk from Hg.</span></p>","language":"English","publisher":"Society of Environmental Toxicology and Chemistry","doi":"10.1002/etc.5620170206","usgsCitation":"Kaplan, J.D., Meyer, M.W., Reaman, P.S., Braselton, W.E., Major, A., Burgess, N., and Scheuhammer, A.M., 1998, Geographic trend in mercury measured in common loon feathers and blood: Environmental Toxicology and Chemistry, v. 17, no. 2, p. 173-183, https://doi.org/10.1002/etc.5620170206.","productDescription":"11 p.","startPage":"173","endPage":"183","costCenters":[],"links":[{"id":374704,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada, United States","state":"Alaska, Maine, Michigan, Minnesota, Montana, New Brunswick, New Hampshire, Nova Scotia, Ontario, Washington, Wisconsin","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  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WI","active":true,"usgs":false}],"preferred":false,"id":788945,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Reaman, Peter S.","contributorId":224649,"corporation":false,"usgs":false,"family":"Reaman","given":"Peter","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":788946,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Braselton, W. Emmett","contributorId":176143,"corporation":false,"usgs":false,"family":"Braselton","given":"W.","email":"","middleInitial":"Emmett","affiliations":[],"preferred":false,"id":788947,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Major, A.","contributorId":9846,"corporation":false,"usgs":true,"family":"Major","given":"A.","email":"","affiliations":[],"preferred":false,"id":788948,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Burgess, Neil","contributorId":224650,"corporation":false,"usgs":false,"family":"Burgess","given":"Neil","email":"","affiliations":[],"preferred":false,"id":788949,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Scheuhammer, Anton M.","contributorId":15477,"corporation":false,"usgs":true,"family":"Scheuhammer","given":"Anton","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":788950,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70047752,"text":"70047752 - 1998 - Hydrology and snowmelt simulation of Snyderville Basin, Park City, and adjacent areas, Summit County, Utah","interactions":[],"lastModifiedDate":"2017-01-05T17:07:47","indexId":"70047752","displayToPublicDate":"1998-01-01T15:32:00","publicationYear":"1998","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":4,"text":"Other Government Series"},"seriesTitle":{"id":294,"text":"Technical Publication","active":false,"publicationSubtype":{"id":4}},"seriesNumber":"115","title":"Hydrology and snowmelt simulation of Snyderville Basin, Park City, and adjacent areas, Summit County, Utah","docAbstract":"<p>Increasing residential and commercial development is placing increased demands on the ground- and surface-water resources of Snyderville Basin, Park City, and adjacent areas in the southwestern corner of Summit County, Utah. Data collected during 1993-95 were used to assess the quantity and quality of the water resources in the study area.</p><p>Ground water within the study area is present in consolidated rocks and unconsolidated valley fill. The complex geology makes it difficult to determine the degree of hydraulic connection between different blocks of consolidated rocks. Increased ground-water withdrawal during 1983- 95 generally has not affected ground-water levels. Ground-water withdrawal in some areas, however, caused seasonal fluctuations and a decline in ground-water levels from 1994 to 1995, despite greater-than-normal recharge in the spring of 1995.</p><p><br></p><p>Ground water generally has a dissolved-solids concentration that ranges from 200 to 600 mg/L. Higher sulfate concentrations in water from wells and springs near Park City and in McLeod Creek and East Canyon Creek than in other parts of the study area are the result of mixing with water that discharges from the Spiro Tunnel. The presence of chloride in water from wells and springs near Park City and in streams and wells near Interstate Highway 80 is probably caused by the dissolution of applied road salt. Chlorofluorocarbon analyses indicate that even though water levels rise within a few weeks of snowmelt, the water took 15 to 40 years to move from areas of recharge to areas of discharge.</p><p><br></p><p>Water budgets for the entire study area and for six subbasins were developed to better understand the hydrologic system. Ground-water recharge from precipitation made up about 80 percent of the ground-water recharge in the study area. Ground-water discharge to streams made up about 40 percent of the surface water in the study area and ground-water discharge to springs and mine tunnels made up about 25 percent. Increasing use of ground water has the potential to decrease discharge to streams and affect both the amount and quality of surface water in the study area. A comparison of the 1995 to 1994 water budgets emphasizes that the hydrologic system in the study area is very dependent upon the amount of annual precipitation. Although precipitation on the study area was much greater in 1995 than in 1994, most of the additional water resulted in additional streamflow and spring discharge that flows out of the study area. Ground-water levels and groundwater discharge are dependent upon annual precipitation and can vary substantially from year to year.</p><p><br></p><p>Snowmelt runoff was simulated to assist in estimating ground-water recharge to consolidated rock and unconsolidated valley fill. A topographically distributed snowmelt model controlled by independent inputs of net radiation, meteorological parameters, and snowcover properties was used to calculate the energy and mass balance of the snowcover.</p>","language":"English","publisher":"Utah Department of Natural Resources, Division of Water Rights","publisherLocation":"Salt Lake City, UT","collaboration":"Prepared by the United States Geological Survey in cooperation with the Utah Department of Natural Resources, Division of Water Rights; Park City; Summit County; and the Weber Basin Water Conservancy District","usgsCitation":"Brooks, L.E., Mason, J.L., and Susong, D.D., 1998, Hydrology and snowmelt simulation of Snyderville Basin, Park City, and adjacent areas, Summit County, Utah: Technical Publication 115, vi, 84 p.","productDescription":"vi, 84 p.","numberOfPages":"93","costCenters":[{"id":610,"text":"Utah Water Science Center","active":true,"usgs":true}],"links":[{"id":279943,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/unnumbered/70047752/report.pdf"},{"id":279942,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/unnumbered/70047752/report-thumb.jpg"},{"id":332236,"rank":3,"type":{"id":15,"text":"Index Page"},"url":"https://www.waterrights.utah.gov/cgi-bin/libview.exe?Modinfo=Viewpub&LIBNUM=50-1-165"}],"scale":"100000","projection":"Universal Transverse Mercator projection","country":"United States","state":"Utah","county":"Summit County","city":"Park City","otherGeospatial":"East Canyon Creek;Mcleod Creek;Snyderville Basin;Spiro Tunnel","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -111.646973,40.599669 ], [ -111.646973,40.819739 ], [ -111.432945,40.819739 ], [ -111.432945,40.599669 ], [ -111.646973,40.599669 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"529dba1ce4b0516126f68cf3","contributors":{"authors":[{"text":"Brooks, Lynette E. 0000-0002-9074-0939 lebrooks@usgs.gov","orcid":"https://orcid.org/0000-0002-9074-0939","contributorId":2718,"corporation":false,"usgs":true,"family":"Brooks","given":"Lynette","email":"lebrooks@usgs.gov","middleInitial":"E.","affiliations":[{"id":610,"text":"Utah Water Science Center","active":true,"usgs":true}],"preferred":true,"id":482893,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mason, James L.","contributorId":14397,"corporation":false,"usgs":true,"family":"Mason","given":"James","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":482894,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Susong, David D. ddsusong@usgs.gov","contributorId":1040,"corporation":false,"usgs":true,"family":"Susong","given":"David","email":"ddsusong@usgs.gov","middleInitial":"D.","affiliations":[{"id":610,"text":"Utah Water Science Center","active":true,"usgs":true}],"preferred":true,"id":482892,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70198953,"text":"70198953 - 1998 - Biogeochemical cycles of nitrogen, phosphorus, and sulfur: Natural distributions and response to disturbance","interactions":[],"lastModifiedDate":"2018-08-27T14:02:47","indexId":"70198953","displayToPublicDate":"1998-01-01T13:59:43","publicationYear":"1998","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"chapter":"14","title":"Biogeochemical cycles of nitrogen, phosphorus, and sulfur: Natural distributions and response to disturbance","docAbstract":"<p>No abstract available.&nbsp;</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"The ecology and management of rivers and streams in the Pacific Northwest Ecoregion","language":"English","publisher":"Springer-Verlag","publisherLocation":"New York","usgsCitation":"McClain, M., Bilby, R.E., and Triska, F., 1998, Biogeochemical cycles of nitrogen, phosphorus, and sulfur: Natural distributions and response to disturbance, chap. 14 <i>of</i> The ecology and management of rivers and streams in the Pacific Northwest Ecoregion, p. 347-372.","productDescription":"26 p.","startPage":"347","endPage":"372","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":356794,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5b98deb1e4b0702d0e848704","contributors":{"editors":[{"text":"Naiman, R.","contributorId":59741,"corporation":false,"usgs":true,"family":"Naiman","given":"R.","email":"","affiliations":[],"preferred":false,"id":743563,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"McClain, M.E.","contributorId":80638,"corporation":false,"usgs":true,"family":"McClain","given":"M.E.","email":"","affiliations":[],"preferred":false,"id":743560,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bilby, Richard E.","contributorId":145928,"corporation":false,"usgs":false,"family":"Bilby","given":"Richard","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":743561,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Triska, F.J.","contributorId":69560,"corporation":false,"usgs":true,"family":"Triska","given":"F.J.","email":"","affiliations":[],"preferred":false,"id":743562,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70198952,"text":"70198952 - 1998 - Sources and age of aquatic humus","interactions":[],"lastModifiedDate":"2018-08-27T13:50:10","indexId":"70198952","displayToPublicDate":"1998-01-01T13:47:22","publicationYear":"1998","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Sources and age of aquatic humus","docAbstract":"<p><span>As aquatic scientists have recognized the diversity of processes controlled by or dependent upon aquatic humus, it has become important to learn more about the genesis, chemical properties, and concentration of humic substances in aquatic ecosystems. There are three classes of aquatic humus (fulvic acids, humic acids, and humin), all of which share the characteristics of being heterogeneous biomolecules which are yellow to brown or black in color, high to moderate molecular weight, and biologically recalcitrant. Fulvic acids are organic acids which are soluble at any pH; humic acids are soluble above pH 2; and humin is insoluble under the full range of pH. Aquatic humus occurs in both dissolved and solid phases, with molecular weights ranging from about 500 D for dissolved fulvic acid to greater than 100,000 D for humic acids in sediments. Although the heterogeneity of these humic fractions makes rigorous chemical studies challenging, there are sufficient analytical methods at hand to make progress toward understanding the sources, formation pathways, and fate of aquatic humus.</span></p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Aquatic humic substances: Ecology and biogeochemsitry","language":"English","publisher":"Springer","publisherLocation":"New York","doi":"10.1007/978-3-662-03736-2_2","usgsCitation":"McKnight, D.M., and Aiken, G.R., 1998, Sources and age of aquatic humus, chap. <i>of</i> Aquatic humic substances: Ecology and biogeochemsitry, p. 9-39, https://doi.org/10.1007/978-3-662-03736-2_2.","productDescription":"31 p.","startPage":"9","endPage":"39","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"links":[{"id":356792,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5b98deb1e4b0702d0e848706","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":743558,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Aiken, George R. 0000-0001-8454-0984 graiken@usgs.gov","orcid":"https://orcid.org/0000-0001-8454-0984","contributorId":1322,"corporation":false,"usgs":true,"family":"Aiken","given":"George","email":"graiken@usgs.gov","middleInitial":"R.","affiliations":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":743559,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70198545,"text":"70198545 - 1998 - Use of 13C NMR and FTIR for elucidation of degradation pathways during natural litter decomposition and compositing. IV. Characterization of humic and fulvic acids extracted from senescent leaves","interactions":[],"lastModifiedDate":"2018-08-13T10:14:17","indexId":"70198545","displayToPublicDate":"1998-01-01T10:37:31","publicationYear":"1998","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Use of 13C NMR and FTIR for elucidation of degradation pathways during natural litter decomposition and compositing. IV. Characterization of humic and fulvic acids extracted from senescent leaves","docAbstract":"<p>No abstract available.&nbsp;</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Humic substances structures, properties and uses","language":"English","publisher":"Royal Society of Chemistry","usgsCitation":"Wershaw, R.L., and Kennedy, K.R., 1998, Use of 13C NMR and FTIR for elucidation of degradation pathways during natural litter decomposition and compositing. IV. Characterization of humic and fulvic acids extracted from senescent leaves, chap. <i>of</i> Humic substances structures, properties and uses, p. 61-68.","productDescription":"8 p.","startPage":"61","endPage":"68","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":356269,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5b98deb1e4b0702d0e848708","contributors":{"authors":[{"text":"Wershaw, Robert L. rwershaw@usgs.gov","contributorId":4856,"corporation":false,"usgs":true,"family":"Wershaw","given":"Robert","email":"rwershaw@usgs.gov","middleInitial":"L.","affiliations":[],"preferred":true,"id":741851,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kennedy, K. R.","contributorId":66267,"corporation":false,"usgs":true,"family":"Kennedy","given":"K.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":741852,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":32535,"text":"32535 - 1998 - Hydrologic units","interactions":[],"lastModifiedDate":"2014-08-04T10:09:41","indexId":"32535","displayToPublicDate":"1998-01-01T10:08:24","publicationYear":"1998","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":6,"text":"USGS Unnumbered Series"},"title":"Hydrologic units","docAbstract":"No abstract available.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"National atlas of the United States","largerWorkSubtype":{"id":6,"text":"USGS Unnumbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/32535","isbn":"0607904747","usgsCitation":"Water Resources Division, U.S. Geological Survey, 1998, Hydrologic units, 1 map, https://doi.org/10.3133/32535.","productDescription":"1 map","numberOfPages":"1","costCenters":[],"links":[{"id":291574,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"scale":"3500000","projection":"Albers Equal Area projection","country":"United States","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 172.4,18.9 ], [ 172.4,71.4 ], [ -66.9,71.4 ], [ -66.9,18.9 ], [ 172.4,18.9 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53e09e5be4b0beb42bdca458","contributors":{"authors":[{"text":"Water Resources Division, U.S. Geological Survey","contributorId":128075,"corporation":true,"usgs":false,"organization":"Water Resources Division, U.S. Geological Survey","id":529403,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70199198,"text":"70199198 - 1998 - Scale effects in fluid flow through fractured geologic media","interactions":[],"lastModifiedDate":"2018-09-10T10:09:31","indexId":"70199198","displayToPublicDate":"1998-01-01T10:05:46","publicationYear":"1998","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"chapter":"12","title":"Scale effects in fluid flow through fractured geologic media","docAbstract":"<p>No abstract available.&nbsp;</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Scale dependence and scale invariance in hydrology","language":"English","publisher":"Cambridge University Press","doi":"10.1017/CBO9780511551864.013","usgsCitation":"Hsieh, P.A., 1998, Scale effects in fluid flow through fractured geologic media, chap. 12 <i>of</i> Scale dependence and scale invariance in hydrology, p. 335-353, https://doi.org/10.1017/CBO9780511551864.013.","productDescription":"19 p.","startPage":"335","endPage":"353","costCenters":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":357186,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5b98deb1e4b0702d0e84870a","contributors":{"editors":[{"text":"Sposito, Garrison","contributorId":178194,"corporation":false,"usgs":false,"family":"Sposito","given":"Garrison","email":"","affiliations":[],"preferred":false,"id":744637,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Hsieh, Paul A. 0000-0003-4873-4874 pahsieh@usgs.gov","orcid":"https://orcid.org/0000-0003-4873-4874","contributorId":1634,"corporation":false,"usgs":true,"family":"Hsieh","given":"Paul","email":"pahsieh@usgs.gov","middleInitial":"A.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":39113,"text":"WMA - Office of Quality Assurance","active":true,"usgs":true}],"preferred":true,"id":744636,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70199196,"text":"70199196 - 1998 - Chloride and tritium concentrations in a thick unsaturated zone underlying an intermittent stream in the Mojave Desert, Southern California, USA","interactions":[],"lastModifiedDate":"2018-09-10T09:46:16","indexId":"70199196","displayToPublicDate":"1998-01-01T09:42:48","publicationYear":"1998","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Chloride and tritium concentrations in a thick unsaturated zone underlying an intermittent stream in the Mojave Desert, Southern California, USA","docAbstract":"<p>No abstract available.&nbsp;</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Gambling with groundwater: Physical, chemical, and biological aspects of aquifer-stream relations","conferenceTitle":"XXVIII Congress of the International Association of Hydrogeologists and the Annual Meeting of the American Institute of Hydrologists","conferenceDate":"September 28-October 2, 1998","conferenceLocation":"Las Vegas","language":"English","publisher":"American Institute of Hydrology","usgsCitation":"Izbicki, J.A., Michel, R.L., and Martin, P., 1998, Chloride and tritium concentrations in a thick unsaturated zone underlying an intermittent stream in the Mojave Desert, Southern California, USA, chap. <i>of</i> Gambling with groundwater: Physical, chemical, and biological aspects of aquifer-stream relations, p. 81-88.","productDescription":"8 p.","startPage":"81","endPage":"88","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":357168,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Mojave Desert","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -117.257080078125,\n              34.1890858311724\n            ],\n            [\n              -115.037841796875,\n              34.1890858311724\n            ],\n            [\n              -115.037841796875,\n              35.55457449014312\n            ],\n            [\n              -117.257080078125,\n              35.55457449014312\n            ],\n            [\n              -117.257080078125,\n              34.1890858311724\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5b98deb1e4b0702d0e84870c","contributors":{"editors":[{"text":"Brahana, J. V.","contributorId":32926,"corporation":false,"usgs":true,"family":"Brahana","given":"J. V.","affiliations":[],"preferred":false,"id":744631,"contributorType":{"id":2,"text":"Editors"},"rank":1},{"text":"Eckstein, Y.","contributorId":54345,"corporation":false,"usgs":true,"family":"Eckstein","given":"Y.","email":"","affiliations":[],"preferred":false,"id":744632,"contributorType":{"id":2,"text":"Editors"},"rank":2}],"authors":[{"text":"Izbicki, John A. 0000-0003-0816-4408 jaizbick@usgs.gov","orcid":"https://orcid.org/0000-0003-0816-4408","contributorId":149374,"corporation":false,"usgs":true,"family":"Izbicki","given":"John","email":"jaizbick@usgs.gov","middleInitial":"A.","affiliations":[],"preferred":false,"id":744628,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Michel, Robert L. rlmichel@usgs.gov","contributorId":823,"corporation":false,"usgs":true,"family":"Michel","given":"Robert","email":"rlmichel@usgs.gov","middleInitial":"L.","affiliations":[{"id":148,"text":"Branch of Regional Research-Western Region","active":false,"usgs":true}],"preferred":true,"id":744629,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Martin, P.","contributorId":24398,"corporation":false,"usgs":true,"family":"Martin","given":"P.","affiliations":[],"preferred":false,"id":744630,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70199195,"text":"70199195 - 1998 - Soil sorption of organic pollutants and pesticides","interactions":[],"lastModifiedDate":"2018-09-10T09:34:23","indexId":"70199195","displayToPublicDate":"1998-01-01T09:32:17","publicationYear":"1998","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Soil sorption of organic pollutants and pesticides","docAbstract":"<p>No abstract available.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Encyclopedia of environmental analysis and remediation","language":"English","publisher":"Wiley","publisherLocation":"New York","usgsCitation":"Chiou, C.T., 1998, Soil sorption of organic pollutants and pesticides, chap. <i>of</i> Encyclopedia of environmental analysis and remediation, p. 4517-4554.","productDescription":"38 p.","startPage":"4517","endPage":"4554","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":357167,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5b98deb1e4b0702d0e84870e","contributors":{"editors":[{"text":"Meyers, Robert A.","contributorId":206476,"corporation":false,"usgs":false,"family":"Meyers","given":"Robert","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":744627,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Chiou, C. T.","contributorId":97080,"corporation":false,"usgs":true,"family":"Chiou","given":"C.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":744626,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70198598,"text":"70198598 - 1998 - Predictive double-layer modeling of metal sorption in mine-drainage systems","interactions":[],"lastModifiedDate":"2018-08-13T10:23:06","indexId":"70198598","displayToPublicDate":"1998-01-01T09:31:27","publicationYear":"1998","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Predictive double-layer modeling of metal sorption in mine-drainage systems","docAbstract":"<p><span>Previous comparison of predictive double-layer modeling and empirically derived metal-partitioning data has validated the use of the double-layer model to predict metal sorption reactions in iron-rich mine-drainage systems. The double-layer model subsequently has been used to model data collected from several mine-drainage sites in Colorado with diverse geochemistry and geology. This work demonstrates that metal partitioning between dissolved and sediment phases can be predictively modeled simply by knowing the water chemistry and the amount of suspended iron-rich particulates present in the system. Sorption on such iron-rich suspended sediments appears to control metal and arsenic partitioning between dissolved and sediment phases, with sorption on bed sediment playing a limited role. At pH &gt; 5, Pb and As are largely sorbed by iron-rich suspended sediments and Cu is partially sorbed; Zn, Cd, and Ni usually remain dissolved throughout the pH range of 3 to 8.</span></p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Adsorption of metals by geomedia: Variables, mechanisms, and model applications","language":"English","publisher":"Elsevier","doi":"10.1016/B978-0-12-384245-9.X5000-2","usgsCitation":"Smith, K., Ranville, J., and Macalady, D., 1998, Predictive double-layer modeling of metal sorption in mine-drainage systems, chap. <i>of</i> Adsorption of metals by geomedia: Variables, mechanisms, and model applications, p. 521-547, https://doi.org/10.1016/B978-0-12-384245-9.X5000-2.","productDescription":"27 p.","startPage":"521","endPage":"547","costCenters":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":356373,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5b98deb1e4b0702d0e848710","contributors":{"editors":[{"text":"Jenne, E. A.","contributorId":45716,"corporation":false,"usgs":true,"family":"Jenne","given":"E. A.","affiliations":[],"preferred":false,"id":742274,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Smith, K. S. 0000-0001-8547-9804","orcid":"https://orcid.org/0000-0001-8547-9804","contributorId":47779,"corporation":false,"usgs":true,"family":"Smith","given":"K. S.","affiliations":[],"preferred":false,"id":742104,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ranville, J. F.","contributorId":54245,"corporation":false,"usgs":true,"family":"Ranville","given":"J. F.","affiliations":[],"preferred":false,"id":742105,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Macalady, D.L.","contributorId":76468,"corporation":false,"usgs":true,"family":"Macalady","given":"D.L.","email":"","affiliations":[],"preferred":false,"id":742106,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70199194,"text":"70199194 - 1998 - Fundamentals of isotope geochemistry","interactions":[],"lastModifiedDate":"2018-09-10T09:19:57","indexId":"70199194","displayToPublicDate":"1998-01-01T09:18:15","publicationYear":"1998","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"chapter":"2","title":"Fundamentals of isotope geochemistry","docAbstract":"<p><span>The dominant use of isotopes in catchment research in the last few decades has been to trace sources of waters and solutes. Generally, such data were evaluated with simple mixing models to determine how much was derived from either of the two (sometimes three) constant-composition sources. This chapter illustrates the environmental isotopes that are natural and anthropogenic isotopes whose wide distribution in the hydrosphere can assist in the solution of hydrogeochemical problems. Water isotopes often provide unambiguous information about residence times and relative contributions from different water sources, and these data can then be used to make hypotheses about water flowpaths. Solute isotopes can provide an alternative, independent isotopic method for determining the relative amounts of water flowing along various subsurface flowpaths. The isotopic and chemical compositions provides very detailed information about sources and reactions in shallow systems This integration of chemical and isotopic data with complex hydrologic models constitutes an important frontier of catchment research.</span></p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Isotope tracers in catchment hydrology","language":"English","publisher":"Elsevier","doi":"10.1016/B978-0-444-81546-0.50009-4","usgsCitation":"Kendall, C., and Caldwell, E.A., 1998, Fundamentals of isotope geochemistry, chap. 2 <i>of</i> Isotope tracers in catchment hydrology, p. 51-86, https://doi.org/10.1016/B978-0-444-81546-0.50009-4.","productDescription":"36 p.","startPage":"51","endPage":"86","costCenters":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":357163,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5b98deb1e4b0702d0e848712","contributors":{"authors":[{"text":"Kendall, Carol 0000-0002-0247-3405 ckendall@usgs.gov","orcid":"https://orcid.org/0000-0002-0247-3405","contributorId":1462,"corporation":false,"usgs":true,"family":"Kendall","given":"Carol","email":"ckendall@usgs.gov","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":744624,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Caldwell, Eric A.","contributorId":207757,"corporation":false,"usgs":false,"family":"Caldwell","given":"Eric","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":744625,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70198492,"text":"70198492 - 1998 - Use of 13C NMR and FTIR for elucidation of degradation pathways during natural litter decomposition and compositing. III. Characterization of leachate from different types of leaves","interactions":[],"lastModifiedDate":"2018-08-13T09:27:06","indexId":"70198492","displayToPublicDate":"1998-01-01T08:51:23","publicationYear":"1998","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Use of 13C NMR and FTIR for elucidation of degradation pathways during natural litter decomposition and compositing. III. Characterization of leachate from different types of leaves","docAbstract":"<p>No abstract available.&nbsp;</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Humic substances structures, properties, and uses","language":"English","publisher":"Royal Science of Chemistry","publisherLocation":"Cambridge, England","usgsCitation":"Wershaw, R.L., Leenheer, J., and Kennedy, K.R., 1998, Use of 13C NMR and FTIR for elucidation of degradation pathways during natural litter decomposition and compositing. III. Characterization of leachate from different types of leaves, chap. <i>of</i> Humic substances structures, properties, and uses, p. 47-60.","productDescription":"14 p.","startPage":"47","endPage":"60","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":356247,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5b98deb2e4b0702d0e848714","contributors":{"editors":[{"text":"Davis, G.","contributorId":17343,"corporation":false,"usgs":true,"family":"Davis","given":"G.","affiliations":[],"preferred":false,"id":742233,"contributorType":{"id":2,"text":"Editors"},"rank":1},{"text":"Ghabbour, E.A.","contributorId":206940,"corporation":false,"usgs":false,"family":"Ghabbour","given":"E.A.","email":"","affiliations":[],"preferred":false,"id":742234,"contributorType":{"id":2,"text":"Editors"},"rank":2}],"authors":[{"text":"Wershaw, Robert L. rwershaw@usgs.gov","contributorId":4856,"corporation":false,"usgs":true,"family":"Wershaw","given":"Robert","email":"rwershaw@usgs.gov","middleInitial":"L.","affiliations":[],"preferred":true,"id":741666,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Leenheer, J. A.","contributorId":195371,"corporation":false,"usgs":false,"family":"Leenheer","given":"J. A.","affiliations":[],"preferred":false,"id":741667,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kennedy, K. R.","contributorId":66267,"corporation":false,"usgs":true,"family":"Kennedy","given":"K.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":741668,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70199895,"text":"70199895 - 1998 - Isotopes as indicators of environmental change","interactions":[],"lastModifiedDate":"2018-10-03T08:12:07","indexId":"70199895","displayToPublicDate":"1998-01-01T08:03:23","publicationYear":"1998","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"chapter":"22","title":"Isotopes as indicators of environmental change","docAbstract":"<p><span>In addition to providing an understanding of processes within a catchment system, isotopic techniques have been instrumental in providing reconstructions of catchment climate and other environmental indicators at various time scales. Many recent changes are a direct consequence of anthropogenic activities. Isotopic analysis serves as a valuable tool for distinguishing between natural variations in long-term climatic patterns and anthropogenic effects, yielding improved understanding of natural feedback mechanisms and the development of realistic remediation strategies. This chapter discusses the examples of isotopic techniques that have been applied to understand several types of ongoing and recent environmental changes, and in paleo-environmental studies. It discusses isotope geochemistry, hydrology, and climatology to look at new ways of applying isotopic tracing techniques to provide information on environmental change. It also gives an overview on how isotopic indicators are being applied in investigations of environmental change in continental settings.</span></p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Isotope tracers in catchment hydrology","language":"English","publisher":"Elsevier","doi":"10.1016/B978-0-444-81546-0.50029-X","usgsCitation":"Shanley, J.B., Pendall, E., Kendall, C., Stevens, L.R., Michel, R.L., Phillips, P.J., Forester, R., Naftz, D.L., Liu, B., Stern, L., Wolfe, B.B., Chamberlain, C.P., Leavitt, S.W., Heaton, T.H., Mayer, B., Cecil, L.D., Lyons, W.B., Katz, B.G., Betancourt, J.L., McKnight, D.M., Blum, J.D., Edwards, T.W., House, H.R., Ito, E., Aravena, R.O., and Whelan, J.F., 1998, Isotopes as indicators of environmental change, chap. 22 <i>of</i> Isotope tracers in catchment hydrology, p. 761-816, https://doi.org/10.1016/B978-0-444-81546-0.50029-X.","productDescription":"56 p.","startPage":"761","endPage":"816","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":358051,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5c1102cce4b034bf6a80a338","contributors":{"authors":[{"text":"Shanley, James B. 0000-0002-4234-3437 jshanley@usgs.gov","orcid":"https://orcid.org/0000-0002-4234-3437","contributorId":1953,"corporation":false,"usgs":true,"family":"Shanley","given":"James","email":"jshanley@usgs.gov","middleInitial":"B.","affiliations":[{"id":405,"text":"NH/VT office of New England Water Science Center","active":true,"usgs":true},{"id":466,"text":"New England Water Science Center","active":true,"usgs":true}],"preferred":true,"id":747160,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pendall, Elise","contributorId":6637,"corporation":false,"usgs":true,"family":"Pendall","given":"Elise","email":"","affiliations":[],"preferred":false,"id":747161,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kendall, Carol 0000-0002-0247-3405 ckendall@usgs.gov","orcid":"https://orcid.org/0000-0002-0247-3405","contributorId":1462,"corporation":false,"usgs":true,"family":"Kendall","given":"Carol","email":"ckendall@usgs.gov","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":747162,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stevens, Lora R.","contributorId":34059,"corporation":false,"usgs":true,"family":"Stevens","given":"Lora","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":747163,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Michel, Robert L. rlmichel@usgs.gov","contributorId":823,"corporation":false,"usgs":true,"family":"Michel","given":"Robert","email":"rlmichel@usgs.gov","middleInitial":"L.","affiliations":[{"id":148,"text":"Branch of Regional Research-Western Region","active":false,"usgs":true}],"preferred":true,"id":747164,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Phillips, Patrick J. 0000-0001-5915-2015 pjphilli@usgs.gov","orcid":"https://orcid.org/0000-0001-5915-2015","contributorId":172757,"corporation":false,"usgs":true,"family":"Phillips","given":"Patrick","email":"pjphilli@usgs.gov","middleInitial":"J.","affiliations":[{"id":474,"text":"New York Water Science Center","active":true,"usgs":true}],"preferred":true,"id":747165,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Forester, Richard","contributorId":59523,"corporation":false,"usgs":true,"family":"Forester","given":"Richard","affiliations":[],"preferred":false,"id":747166,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Naftz, David L. 0000-0003-1130-6892 dlnaftz@usgs.gov","orcid":"https://orcid.org/0000-0003-1130-6892","contributorId":1041,"corporation":false,"usgs":true,"family":"Naftz","given":"David","email":"dlnaftz@usgs.gov","middleInitial":"L.","affiliations":[{"id":610,"text":"Utah Water Science Center","active":true,"usgs":true},{"id":5050,"text":"WY-MT Water Science Center","active":true,"usgs":true}],"preferred":true,"id":747167,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Liu, Beiling","contributorId":208426,"corporation":false,"usgs":false,"family":"Liu","given":"Beiling","email":"","affiliations":[],"preferred":false,"id":747168,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Stern, Libby","contributorId":208427,"corporation":false,"usgs":false,"family":"Stern","given":"Libby","affiliations":[],"preferred":false,"id":747169,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Wolfe, Brent B.","contributorId":172516,"corporation":false,"usgs":false,"family":"Wolfe","given":"Brent","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":747170,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Chamberlain, C. Page","contributorId":194322,"corporation":false,"usgs":false,"family":"Chamberlain","given":"C.","email":"","middleInitial":"Page","affiliations":[],"preferred":false,"id":747171,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Leavitt, Steven W.","contributorId":77312,"corporation":false,"usgs":true,"family":"Leavitt","given":"Steven","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":747172,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Heaton, T. H.","contributorId":64671,"corporation":false,"usgs":false,"family":"Heaton","given":"T.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":747173,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Mayer, Bernhard","contributorId":94972,"corporation":false,"usgs":true,"family":"Mayer","given":"Bernhard","email":"","affiliations":[],"preferred":false,"id":747174,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"Cecil, L. DeWayne","contributorId":72828,"corporation":false,"usgs":true,"family":"Cecil","given":"L.","email":"","middleInitial":"DeWayne","affiliations":[],"preferred":false,"id":747175,"contributorType":{"id":1,"text":"Authors"},"rank":16},{"text":"Lyons, W. Berry","contributorId":193456,"corporation":false,"usgs":false,"family":"Lyons","given":"W.","email":"","middleInitial":"Berry","affiliations":[],"preferred":false,"id":747176,"contributorType":{"id":1,"text":"Authors"},"rank":17},{"text":"Katz, Brian G. bkatz@usgs.gov","contributorId":1093,"corporation":false,"usgs":true,"family":"Katz","given":"Brian","email":"bkatz@usgs.gov","middleInitial":"G.","affiliations":[],"preferred":true,"id":747177,"contributorType":{"id":1,"text":"Authors"},"rank":18},{"text":"Betancourt, Julio L. 0000-0002-7165-0743 jlbetanc@usgs.gov","orcid":"https://orcid.org/0000-0002-7165-0743","contributorId":3376,"corporation":false,"usgs":true,"family":"Betancourt","given":"Julio","email":"jlbetanc@usgs.gov","middleInitial":"L.","affiliations":[{"id":554,"text":"Science and Decisions Center","active":true,"usgs":true},{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":747178,"contributorType":{"id":1,"text":"Authors"},"rank":19},{"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":747179,"contributorType":{"id":1,"text":"Authors"},"rank":20},{"text":"Blum, Joel D.","contributorId":83657,"corporation":false,"usgs":true,"family":"Blum","given":"Joel","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":747180,"contributorType":{"id":1,"text":"Authors"},"rank":21},{"text":"Edwards, Thomas W.D. 0000-0002-0773-0909 tce@usgs.gov","orcid":"https://orcid.org/0000-0002-0773-0909","contributorId":195384,"corporation":false,"usgs":false,"family":"Edwards","given":"Thomas","email":"tce@usgs.gov","middleInitial":"W.D.","affiliations":[],"preferred":false,"id":747181,"contributorType":{"id":1,"text":"Authors"},"rank":22},{"text":"House, Harold R. hrhouse@usgs.gov","contributorId":4319,"corporation":false,"usgs":true,"family":"House","given":"Harold","email":"hrhouse@usgs.gov","middleInitial":"R.","affiliations":[],"preferred":true,"id":747182,"contributorType":{"id":1,"text":"Authors"},"rank":23},{"text":"Ito, Emi","contributorId":208428,"corporation":false,"usgs":false,"family":"Ito","given":"Emi","email":"","affiliations":[],"preferred":false,"id":747183,"contributorType":{"id":1,"text":"Authors"},"rank":24},{"text":"Aravena, Ramon O.","contributorId":173074,"corporation":false,"usgs":false,"family":"Aravena","given":"Ramon","email":"","middleInitial":"O.","affiliations":[],"preferred":false,"id":747184,"contributorType":{"id":1,"text":"Authors"},"rank":25},{"text":"Whelan, Joseph F.","contributorId":29792,"corporation":false,"usgs":true,"family":"Whelan","given":"Joseph","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":747185,"contributorType":{"id":1,"text":"Authors"},"rank":26}]}}
,{"id":70198535,"text":"70198535 - 1998 - Using transport model interpretations of tracer tests to study microbial processes in groundwater","interactions":[],"lastModifiedDate":"2018-08-13T09:58:25","indexId":"70198535","displayToPublicDate":"1998-01-01T08:01:21","publicationYear":"1998","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Using transport model interpretations of tracer tests to study microbial processes in groundwater","docAbstract":"<p><span>It has long been known that microorganisms affect the geochemistry of groundwater. But despite this recognition, little detailed information is available regarding the rates and the factors controlling microbial processes in groundwater. Part of the reason stems from the relatively inaccessible nature of most groundwater and the difficulties encountered in obtaining representative samples of groundwater and subsurface sediments. At the same time, most groundwater systems are nutrient poor or oligotrophic environments in which the resident microorganisms are severely stressed and often nearly inactive. These populations are functioning so slowly that many types of activity measurements designed to assess microbial processes in more productive environments are ineffective for groundwater. However, because groundwater is by far the largest reservoir of freshwater in the world (</span><span class=\"CitationRef\"><a title=\"View reference\" href=\"https://link.springer.com/chapter/10.1007/978-1-4615-4078-6_5#CR13\" aria-pressed=\"false\" aria-haspopup=\"true\" aria-controls=\"popup-references\" data-mce-href=\"https://link.springer.com/chapter/10.1007/978-1-4615-4078-6_5#CR13\">Freeze and Cherry 1979</a></span><span>), our lack of knowledge about groundwater microorganisms and their processes represents a significant void in the study of microbial ecology and in our ability to predict the outcome when these reserves are compromised by contamination.</span></p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Mathematical modeling in microbial ecology","language":"English","publisher":"Springer","doi":"10.1007/978-1-4615-4078-6_5","usgsCitation":"Smith, R.L., and Garabedian, S.P., 1998, Using transport model interpretations of tracer tests to study microbial processes in groundwater, chap. <i>of</i> Mathematical modeling in microbial ecology, p. 94-123, https://doi.org/10.1007/978-1-4615-4078-6_5.","productDescription":"30 p.","startPage":"94","endPage":"123","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"links":[{"id":356263,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5b98deb2e4b0702d0e848716","contributors":{"authors":[{"text":"Smith, Richard L. 0000-0002-3829-0125 rlsmith@usgs.gov","orcid":"https://orcid.org/0000-0002-3829-0125","contributorId":1592,"corporation":false,"usgs":true,"family":"Smith","given":"Richard","email":"rlsmith@usgs.gov","middleInitial":"L.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":38175,"text":"Toxics Substances Hydrology Program","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true}],"preferred":true,"id":741817,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Garabedian, Stephen P.","contributorId":91090,"corporation":false,"usgs":true,"family":"Garabedian","given":"Stephen","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":741818,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70185694,"text":"70185694 - 1998 - Selecting remediation goals by assessing the natural attenuation capacity of groundwater systems","interactions":[],"lastModifiedDate":"2017-03-27T16:14:38","indexId":"70185694","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1042,"text":"Bioremediation Journal","active":true,"publicationSubtype":{"id":10}},"title":"Selecting remediation goals by assessing the natural attenuation capacity of groundwater systems","docAbstract":"<p><span>Remediation goals for the source areas of a chlorinated ethene‐contaminated groundwater plume were identified by assessing the natural attenuation capacity of the aquifer system. The redox chemistry of the site indicates that sulfate‐reducing (H</span><sub>2</sub><span> ∼ 2 nanomoles [nM]) per liter conditions near the contaminant source grade to Fe(III)‐reducing conditions (H</span><sub>2</sub><span> ∼ 0.5 nM) downgradient of the source. Sulfate‐reducing conditions facilitate the initial reduction of perchloroethene (PCE) to trichloroethene (TCE), </span><i>cis</i><span>‐dichloroethene (</span><i>cis</i><span>‐DCE), and vinyl chloride (VC). Subsequently, the Fe(III)‐reducing conditions drive the oxidation of </span><i>cis</i><span>‐DCE and VC to carbon dioxide and chloride. This sequence gives the aquifer a substantial capacity for biodegrading chlorinated ethenes. Natural attenuation capacity (the slope of the steady‐state contaminant concentration profile along a groundwater flowpath) is a function of biodegradation rates, aquifer dispersive characteristics, and groundwater flow velocity. The natural attenuation capacity at the Kings Bay, Georgia site was assessed by estimating groundwater flowrates (∼0.23 ± 0.12 m/d) and aquifer dispersivity (∼1 m) from hydrologic and scale considerations. Apparent biodegradation rate constants (PCE and TCE ∼ 0.01 d</span><sup>−1</sup><span>; </span><i>cis</i><span>‐DCE and VC ∼ 0.025 d</span><sup>−1</sup><span>) were estimated from observed contaminant concentration changes along aquifer flowpaths. A boundary‐value problem approach was used to estimate levels to which contaminant concentrations in the source areas must be lowered (by engineered removal), or groundwater flow velocities lowered (by pumping) for the natural attenuation capacity to achieve maximum concentration limits (MCLs) prior to reaching a predetermined regulatory point of compliance.</span></p>","language":"English","publisher":"Taylor & Francis","doi":"10.1080/10889869809380381","usgsCitation":"Chapelle, F.H., and Bradley, P.M., 1998, Selecting remediation goals by assessing the natural attenuation capacity of groundwater systems: Bioremediation Journal, v. 2, no. 3-4, p. 227-238, https://doi.org/10.1080/10889869809380381.","productDescription":"12 p. ","startPage":"227","endPage":"238","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":338422,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"2","issue":"3-4","noUsgsAuthors":false,"publicationDate":"2008-11-19","publicationStatus":"PW","scienceBaseUri":"58da253be4b0543bf7fda86f","contributors":{"authors":[{"text":"Chapelle, Francis H. chapelle@usgs.gov","contributorId":1350,"corporation":false,"usgs":true,"family":"Chapelle","given":"Francis","email":"chapelle@usgs.gov","middleInitial":"H.","affiliations":[{"id":559,"text":"South Carolina Water Science Center","active":true,"usgs":true},{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"preferred":true,"id":686419,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bradley, Paul M. 0000-0001-7522-8606 pbradley@usgs.gov","orcid":"https://orcid.org/0000-0001-7522-8606","contributorId":361,"corporation":false,"usgs":true,"family":"Bradley","given":"Paul","email":"pbradley@usgs.gov","middleInitial":"M.","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"preferred":true,"id":686420,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70185511,"text":"70185511 - 1998 - Satellite telemetry: A new tool for wildlife research and management","interactions":[],"lastModifiedDate":"2021-01-25T13:59:35.120075","indexId":"70185511","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":1,"text":"Federal Government Series"},"seriesTitle":{"id":79,"text":"Resource Publication","active":false,"publicationSubtype":{"id":1}},"seriesNumber":"172","title":"Satellite telemetry: A new tool for wildlife research and management","docAbstract":"<p>The U.S. Fish and Wildlife Service and the Alaska Department of Fish and Game have cooperated since 1984 to develop and evaluate satellite telemetry as a means of overcoming the high costs and logistical problems of conventional VHF (very high frequency) radiotelemetry systems. Detailed locational and behavioral data on caribou (<i>Rangifer tarandus</i>), polar bears (<i>Ursus maritimus</i>), and other large mammals in Alaska have been obtained using the Argos Data Collection and Location System (DCLS). The Argos system, a cooperative project of the Centre National d'Études Spatiales of France, the National Oceanic and Atmospheric Administration, and the National Aeronautics and Space Administration, is designed to acquire environmental data on a routine basis from anywhere on earth. Transmitters weighing 1.6-2.0 kg and functioning approximately 12-18 months operated on a frequency of 401.650 MHz. Signals from the transmitters were received by Argos DCLS instruments aboard two Tiros-N weather satellites in sun-synchronous, nearpolar orbits. Data from the satellites were received at tracking stations, transferred to processing centers in Maryland and France, and made available to users via computer tape, printouts, or telephone links.</p><p>During 1985 and 1986, more than 25,000 locations and an additional 28,000 sets of sensor data (transmitter temperature and short-term and long-term indices of animal activity) were acquired for caribou and polar bears. Locations were calculated from the Doppler shift in the transmitted signal as the satellite approached and then moved away from the transmitter. The mean locational error for transmitters at known locations (n - 1,265) was 829 m; 90% of the calculated locations were within 1,700 m of the true location. Caribou transmitters provided a mean of 3.1 (+5.0. SD) locations per day during 6h of daily operation, and polar bear transmitters provided 1.7 (+6.9SD) locations during 12h of operation every third day. During the first 6 months of operation, the UHF (ultra-high frequency) signal failed on three of 32 caribou transmitters and 10 of 36 polar bear transmitters.</p><p>A geographic information system (GIS) incorporating other databases (e.g., land cover, elevation, slope, aspect, hydrology, ice distribution) was used to analyze and display detailed locational and behavioral data collected via satellite. Examples of GIS applications to research projects using satellite telemetry and examples of detailed movement patterns of caribou and polar bears are presented. This report includes documentation for computer software packages for processing Argos data and presents developments, as of March 1987, in transmitter design, data retrieval using a local user terminal, computer software, and sensor development and calibration.</p>","language":"English","publisher":"U.S. Fish and Wildlife Service","publisherLocation":"Washington, D.C.","usgsCitation":"Fancy, S.G., Pank, L.F., Douglas, D.C., Curby, C.H., Garner, G.W., Amstrup, S.C., and Regelin, W.L., 1998, Satellite telemetry: A new tool for wildlife research and management: Resource Publication 172, 54 p.","productDescription":"54 p.","numberOfPages":"61","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":338146,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":382535,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://ecos.fws.gov/ServCat/DownloadFile/105285","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58d38d3be4b0236b68f98eec","contributors":{"authors":[{"text":"Fancy, Steven G.","contributorId":176135,"corporation":false,"usgs":false,"family":"Fancy","given":"Steven","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":685817,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pank, Larry F.","contributorId":82767,"corporation":false,"usgs":true,"family":"Pank","given":"Larry","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":685818,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Douglas, David C. 0000-0003-0186-1104 ddouglas@usgs.gov","orcid":"https://orcid.org/0000-0003-0186-1104","contributorId":2388,"corporation":false,"usgs":true,"family":"Douglas","given":"David","email":"ddouglas@usgs.gov","middleInitial":"C.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":685819,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Curby, Catherine H.","contributorId":189722,"corporation":false,"usgs":false,"family":"Curby","given":"Catherine","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":685820,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Garner, Gerald W.","contributorId":149918,"corporation":false,"usgs":false,"family":"Garner","given":"Gerald","email":"","middleInitial":"W.","affiliations":[{"id":13117,"text":"Institute of Arctic Biology, University of Alaska Fairbanks","active":true,"usgs":false}],"preferred":false,"id":685821,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Amstrup, Steven C.","contributorId":67034,"corporation":false,"usgs":false,"family":"Amstrup","given":"Steven","email":"","middleInitial":"C.","affiliations":[{"id":13182,"text":"Polar Bears International","active":true,"usgs":false}],"preferred":false,"id":685822,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Regelin, Wayne L.","contributorId":111763,"corporation":false,"usgs":false,"family":"Regelin","given":"Wayne","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":685823,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70185685,"text":"70185685 - 1998 - Considerations in As analysis and speciation","interactions":[],"lastModifiedDate":"2019-02-04T10:27:46","indexId":"70185685","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5328,"text":"Journal of the American Water Works Association","active":true,"publicationSubtype":{"id":10}},"title":"Considerations in As analysis and speciation","docAbstract":"<p><span>This article summarizes recent experiences in arsenic (As) quantification, preservation, and speciation developed during AWWA Research Foundation (AWWARF) and Water Industry Technical Action Fund (WITAF) projects. The goal of this article is to alert analysts and decision-makers to potential problems in As analysis and speciation, because there appear to be several unresolved problems with routine analytical approaches. In true split drinking water samples As was quantified by three accepted analytical methods in three laboratories. The techniques used were graphite furnace atomic absorption spectrometry (GFAAS), inductively coupled plasma mass spectrometry (ICP-MS), and hydride generation inductively coupled plasma-emission spectrometry (HG-ICP-AES). Experimental findings are organized into sections on As analysis, particulate As in water supplies, and examination of As speciation methods.</span></p>","language":"English","publisher":"American Water Works Association","doi":"10.1002/j.1551-8833.1998.tb08402.x","usgsCitation":"Edwards, M., Patel, S., McNeil, L., Chen, H., Frey, M., Eaton, A., Antweiler, R.C., and Taylor, H.E., 1998, Considerations in As analysis and speciation: Journal of the American Water Works Association, v. 43, no. 6, p. 1378-1383, https://doi.org/10.1002/j.1551-8833.1998.tb08402.x.","productDescription":"6 p.","startPage":"1378","endPage":"1383","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":338410,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58da253be4b0543bf7fda871","contributors":{"authors":[{"text":"Edwards, M.","contributorId":8627,"corporation":false,"usgs":true,"family":"Edwards","given":"M.","affiliations":[],"preferred":false,"id":686382,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Patel, S.","contributorId":189889,"corporation":false,"usgs":false,"family":"Patel","given":"S.","email":"","affiliations":[],"preferred":false,"id":686383,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McNeil, L.","contributorId":189890,"corporation":false,"usgs":false,"family":"McNeil","given":"L.","email":"","affiliations":[],"preferred":false,"id":686384,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Chen, H.W.","contributorId":189891,"corporation":false,"usgs":false,"family":"Chen","given":"H.W.","email":"","affiliations":[],"preferred":false,"id":686385,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Frey, M.","contributorId":26797,"corporation":false,"usgs":true,"family":"Frey","given":"M.","email":"","affiliations":[],"preferred":false,"id":686386,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Eaton, A.D.","contributorId":189892,"corporation":false,"usgs":false,"family":"Eaton","given":"A.D.","email":"","affiliations":[],"preferred":false,"id":686387,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Antweiler, Ronald C. 0000-0001-5652-6034 antweil@usgs.gov","orcid":"https://orcid.org/0000-0001-5652-6034","contributorId":1481,"corporation":false,"usgs":true,"family":"Antweiler","given":"Ronald","email":"antweil@usgs.gov","middleInitial":"C.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":686388,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Taylor, Howard E. hetaylor@usgs.gov","contributorId":1551,"corporation":false,"usgs":true,"family":"Taylor","given":"Howard","email":"hetaylor@usgs.gov","middleInitial":"E.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":686389,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70185696,"text":"70185696 - 1998 - Feldspars as a source of nutrients for microorganisms","interactions":[],"lastModifiedDate":"2019-02-04T07:38:37","indexId":"70185696","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":738,"text":"American Mineralogist","active":true,"publicationSubtype":{"id":10}},"title":"Feldspars as a source of nutrients for microorganisms","docAbstract":"<p>Phosphorus and nitrogen are essential macronutrients necessary for the survival of virtually all living organisms. In groundwater systems, these nutrients can be quite scarce and can represent limiting elements for growth of subsurface microorganisms. In this study we examined silicate sources of these elements by characterizing the colonization and weathering of feldspars in situ using field microcosms. We found that in carbon-rich anoxic groundwaters where P and N are scarce, feldspars that contain inclusions of P-minerals such as apatite are preferentially colonized over similar feldspars without P. A microcline from S. Dakota, which contains 0.24% P2O5 but ,1 mmol/ g NH , was heavily colonized 1 4 and deeply weathered. A similar microcline from Ontario, which has no detectable P or NH , was barren of attached organisms and completely unweathered after one year. An- 1 4 orthoclase (0.28% P2O5, ;1 mmol/g NH ) was very heavily colonized and weathered, 1 4 whereas plagioclase specimens (,0.01% P, ,1 mmmol/g NH ) were uncolonized and 1 4 unweathered. In addition, the observed weathering rates are faster than expected based on laboratory rates. We propose that this system is particularly sensitive to the availability of P, and the native subsurface microorganisms have developed biochemical strategies to aggressively scavenge P (or some other essential nutrient such as Fe31 ) from resistant feldspars. The result of this interaction is that only minerals containing P will be signifi- cantly colonized, and these feldspars will be preferentially destroyed, as the subsurface microbial community scavenges a limiting nutrient.</p>","language":"English","publisher":"GeoScienceWorld ","doi":"10.2138/am-1998-11-1241","usgsCitation":"Rogers, J., Bennett, P., and Choi, W., 1998, Feldspars as a source of nutrients for microorganisms: American Mineralogist, v. 83, p. 1532-1540, https://doi.org/10.2138/am-1998-11-1241.","productDescription":"9 p.","startPage":"1532","endPage":"1540","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":338423,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"83","noUsgsAuthors":false,"publicationDate":"1998-12-01","publicationStatus":"PW","scienceBaseUri":"58da253be4b0543bf7fda86d","contributors":{"authors":[{"text":"Rogers, J.R.","contributorId":189897,"corporation":false,"usgs":false,"family":"Rogers","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":686422,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bennett, P.C.","contributorId":24357,"corporation":false,"usgs":true,"family":"Bennett","given":"P.C.","email":"","affiliations":[],"preferred":false,"id":686423,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Choi, W.J.","contributorId":189896,"corporation":false,"usgs":false,"family":"Choi","given":"W.J.","email":"","affiliations":[],"preferred":false,"id":686424,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70185265,"text":"70185265 - 1998 - Suitability of parametric models to describe the hydraulic properties of an unsaturated coarse sand and gravel","interactions":[],"lastModifiedDate":"2017-03-17T11:27:46","indexId":"70185265","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3825,"text":"Groundwater","active":true,"publicationSubtype":{"id":10}},"title":"Suitability of parametric models to describe the hydraulic properties of an unsaturated coarse sand and gravel","docAbstract":"<p><span>The performance of parametric models used to describe soil water retention (SWR) properties and predict unsaturated hydraulic conductivity (K) as a function of volumetric water content (θ) is examined using SWR and K(θ) data for coarse sand and gravel sediments. Six 70 cm long, 10 cm diameter cores of glacial outwash were instrumented at eight depths with porous cup ten-siometers and time domain reflectometry probes to measure soil water pressure head (h) and θ, respectively, for seven unsaturated and one saturated steady-state flow conditions. Forty-two θ(h) and K(θ) relationships were measured from the infiltration tests on the cores. Of the four SWR models compared in the analysis, the van Genuchten (1980) equation with parameters m and n restricted according to the Mualem (m = 1 - 1/n) criterion is best suited to describe the θ(h) relationships. The accuracy of two models that predict K(θ) using parameter values derived from the SWR models was also evaluated. The model developed by van Genuchten (1980) based on the theoretical expression of Mualem (1976) predicted K(θ) more accurately than the van Genuchten (1980) model based on the theory of Burdine (1953). A sensitivity analysis shows that more accurate predictions of K(θ) are achieved using SWR model parameters derived with residual water content (θ</span><sub>r</sub><span>) specified according to independent measurements of θ at values of h where θ/h ∼ 0 rather than model-fit θ</span><sub>r</sub><span> values. The accuracy of the model K(θ) function improves markedly when at least one value of unsaturated K is used to scale the K(θ) function predicted using the saturated K. The results of this investigation indicate that the hydraulic properties of coarse-grained sediments can be accurately described using the parametric models. In addition, data collection efforts should focus on measuring at least one value of unsaturated hydraulic conductivity and as complete a set of SWR data as possible, particularly in the dry range.</span></p>","language":"English","publisher":"Wiley","doi":"10.1111/j.1745-6584.1998.tb02818.x","usgsCitation":"Mace, A., Rudolph, D.L., and Kachanoski, R.G., 1998, Suitability of parametric models to describe the hydraulic properties of an unsaturated coarse sand and gravel: Groundwater, v. 36, no. 3, p. 465-475, https://doi.org/10.1111/j.1745-6584.1998.tb02818.x.","productDescription":"11 p. ","startPage":"465","endPage":"475","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":337801,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"36","issue":"3","noUsgsAuthors":false,"publicationDate":"2005-12-23","publicationStatus":"PW","scienceBaseUri":"58ccf59fe4b0849ce97f0cf8","contributors":{"authors":[{"text":"Mace, Andy","contributorId":189473,"corporation":false,"usgs":false,"family":"Mace","given":"Andy","email":"","affiliations":[],"preferred":false,"id":684933,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rudolph, David L.","contributorId":189474,"corporation":false,"usgs":false,"family":"Rudolph","given":"David","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":684934,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kachanoski, R. Gary","contributorId":189475,"corporation":false,"usgs":false,"family":"Kachanoski","given":"R.","email":"","middleInitial":"Gary","affiliations":[],"preferred":false,"id":684935,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
]}