{"pageNumber":"470","pageRowStart":"11725","pageSize":"25","recordCount":16446,"records":[{"id":70216796,"text":"70216796 - 1991 - Preliminary analysis of the hydrologic and geochemical controls on acid‐neutralizing capacity in two acidic seepage lakes in Florida","interactions":[],"lastModifiedDate":"2020-12-08T13:13:11.863559","indexId":"70216796","displayToPublicDate":"1991-01-01T15:48:07","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Preliminary analysis of the hydrologic and geochemical controls on acid‐neutralizing capacity in two acidic seepage lakes in Florida","docAbstract":"<p><span>In late 1988, parallel studies of Lake Five‐O (</span><i>p</i><span>H 5.14) in the Florida panhandle and Lake Barco (</span><i>p</i><span>H 4.50) in north central Florida were initiated to develop hydrologic and major ion budgets of these lakes as part of an overall effort to improve understanding of the hydrologic, depositional, and biogeochemical factors that control acid‐neutralizing capacity (ANC) in seepage lakes. Preliminary findings from these studies indicate that earlier perceptions of lake hydrology and mechanisms of ANC regulation in Florida seepage lakes may have to be revised. The traditional perspective of seepage lakes in the Florida panhandle views these systems as dominated by precipitation inputs and that ANC regulation is due largely to in‐lake processes. Our results for Lake Five‐O show modest to steep hydraulic gradients almost entirely around the lake. In addition, the horizontal hydraulic conductivity of the surficial aquifer is high (8–74 m day</span><sup>−1</sup><span>), indicating that large quantities of groundwater flow into Lake Five‐O. Calculations of net groundwater flow from hydrologic budgets also indicate that groundwater may comprise at least 38 to 46% of the total inflow. For Lake Barco, net flow estimates of the minimum groundwater inflow range from 5 to 14% of total inflow. Enrichment factor and ion flux calculations for Lake Five‐O and Lake Barco indicate that terrestrial as well as in‐lake processes contribute significantly to ANC regulation. The extent that terrestrial processes contribute to ANC generation is directly related to the magnitude of groundwater inflow as well as the degree of ion enrichment or depletion that occurs in the surficial aquifer. Net ANC generation in both study lakes was dominated by anion retention (NO</span><sub>3</sub><sup>−</sup><span>&nbsp;and SO</span><sub>4</sub><sup>2−</sup><span>). Where previous studies concluded that in‐lake reduction was the primary sink for SO</span><sub>4</sub><sup>2−</sup><span>, our preliminary calculations show that adsorption of SO</span><sub>4</sub><sup>2−</sup><span>&nbsp;within the watershed is perhaps twice as important as in‐lake reduction as a source of ANC. Net base cation enrichment in both lakes was negligible.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/91WR01435","usgsCitation":"Pollman, C.D., Lee, T.M., Andrews, W.J., Sacks, L.A., Gherini, S., and Munson, R., 1991, Preliminary analysis of the hydrologic and geochemical controls on acid‐neutralizing capacity in two acidic seepage lakes in Florida: Water Resources Research, v. 27, no. 9, p. 2321-2335, https://doi.org/10.1029/91WR01435.","productDescription":"15 p.","startPage":"2321","endPage":"2335","numberOfPages":"15","costCenters":[],"links":[{"id":381072,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United 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M.","contributorId":67855,"corporation":false,"usgs":true,"family":"Lee","given":"T.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":806312,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Andrews, William J. 0000-0003-4780-8835 wandrews@usgs.gov","orcid":"https://orcid.org/0000-0003-4780-8835","contributorId":328,"corporation":false,"usgs":true,"family":"Andrews","given":"William","email":"wandrews@usgs.gov","middleInitial":"J.","affiliations":[{"id":516,"text":"Oklahoma Water Science Center","active":true,"usgs":true}],"preferred":true,"id":806313,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Sacks, L. A.","contributorId":83092,"corporation":false,"usgs":true,"family":"Sacks","given":"L.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":806314,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Gherini, S.A.","contributorId":245505,"corporation":false,"usgs":false,"family":"Gherini","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":806315,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Munson, R.K.","contributorId":245506,"corporation":false,"usgs":false,"family":"Munson","given":"R.K.","email":"","affiliations":[],"preferred":false,"id":806316,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70198954,"text":"70198954 - 1991 - Assessing the solubilities and reaction kinetics of aluminous minerals in soils","interactions":[],"lastModifiedDate":"2018-08-27T14:07:39","indexId":"70198954","displayToPublicDate":"1991-01-01T14:05:44","publicationYear":"1991","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Assessing the solubilities and reaction kinetics of aluminous minerals in soils","docAbstract":"<p><span>The use of chemical thermodynamics and reaction kinetics is necessary to quantitatively model the transformation of aluminous minerals and their dissolved constituents in soils and other geochemical systems. Soils are thermodynamically open systems subject to atmospheric and biological forces and do not attain overall thermodynamic equilibrium with respect to either mass or time. However, local or partial equilibrium conditions may persist for particular minerals and their dissolved constituents. Igneous and metamorphic primary minerals break down chemically to yield disordered gels or colloids and constituent ions, which can then reorganize or precipitate to form more stable hydrous oxides, silicates, carbonates or other mineral species. Naturally-occurring iron and aluminum hydrous oxides and kaolin clays, abundant in highly weathered soils, are commonly believed to be the ultimate, stable end products of weathering reactions, but usually are thermodynamically metastable with respect to more perfectly ordered, synthetic specimens. Thermodynamic stability is no guaranty of mineral persistence; with sufficient time, even the most perfectly crystallized, stable mineral will yield to the solubilizing assault of undersaturated surface waters. All of the dissolution and precipitation reactions of soil minerals are driven by energy differences in the thermodynamic stabilities of reactants and products, and the velocities (or kinetics) of such reactions are regulated by variables of the hydrogeochemical environment.</span></p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Solid acidity","language":"English","publisher":"Springer-Verlag","publisherLocation":"Berlin","doi":"10.1007/978-3-642-74442-6_6","usgsCitation":"May, H.M., and Nordstrom, D.K., 1991, Assessing the solubilities and reaction kinetics of aluminous minerals in soils, chap. <i>of</i> Solid acidity, p. 125-148, https://doi.org/10.1007/978-3-642-74442-6_6.","productDescription":"24 p.","startPage":"125","endPage":"148","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":356796,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5c11243ce4b034bf6a81deb2","contributors":{"authors":[{"text":"May, Howard M.","contributorId":27202,"corporation":false,"usgs":true,"family":"May","given":"Howard","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":743565,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Nordstrom, D. Kirk 0000-0003-3283-5136 dkn@usgs.gov","orcid":"https://orcid.org/0000-0003-3283-5136","contributorId":749,"corporation":false,"usgs":true,"family":"Nordstrom","given":"D.","email":"dkn@usgs.gov","middleInitial":"Kirk","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":false,"id":743566,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70125395,"text":"70125395 - 1991 - Predicting the response of woody riparian vegetation to changes in instream flows through integrated monitoring of stream hydrology and riparian vegetation","interactions":[],"lastModifiedDate":"2014-09-16T13:52:06","indexId":"70125395","displayToPublicDate":"1991-01-01T13:51:12","publicationYear":"1991","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":9,"text":"Other Report"},"seriesNumber":"Information Series No. 66","title":"Predicting the response of woody riparian vegetation to changes in instream flows through integrated monitoring of stream hydrology and riparian vegetation","docAbstract":"No abstract available.","largerWorkTitle":"South Platte River resource management: Finding a balance - Conference Proceedings","language":"English","publisher":"Colorado Water Resources Research Center, Colorado State University","publisherLocation":"Fort Collins, CO","usgsCitation":"Scott, M.L., Martin, L., Auble, G.T., and Segelquist, C., 1991, Predicting the response of woody riparian vegetation to changes in instream flows through integrated monitoring of stream hydrology and riparian vegetation, 46 p.","productDescription":"46 p.","numberOfPages":"46","costCenters":[],"links":[{"id":293979,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5419514ce4b091c7ffc8e7da","contributors":{"authors":[{"text":"Scott, M. L.","contributorId":75090,"corporation":false,"usgs":true,"family":"Scott","given":"M.","middleInitial":"L.","affiliations":[],"preferred":false,"id":501384,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Martin, L.J.","contributorId":73637,"corporation":false,"usgs":true,"family":"Martin","given":"L.J.","email":"","affiliations":[],"preferred":false,"id":501383,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Auble, Gregor T. 0000-0002-0843-2751 aubleg@usgs.gov","orcid":"https://orcid.org/0000-0002-0843-2751","contributorId":2187,"corporation":false,"usgs":true,"family":"Auble","given":"Gregor","email":"aubleg@usgs.gov","middleInitial":"T.","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":501382,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Segelquist, C.A.","contributorId":108410,"corporation":false,"usgs":true,"family":"Segelquist","given":"C.A.","affiliations":[],"preferred":false,"id":501385,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70170332,"text":"70170332 - 1991 - Evaluation of unsaturated zone air permeability through pneumatic tests","interactions":[],"lastModifiedDate":"2019-03-28T06:20:31","indexId":"70170332","displayToPublicDate":"1991-01-01T12:45:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation of unsaturated zone air permeability through pneumatic tests","docAbstract":"<p><span>Predicting the steady state distribution of air pressure in the unsaturated zone resulting from a pneumatic test provides a method for determining air-phase permeability. This technique is analogous to the inverse problem of well hydraulics; however, air flow is more complicated than ground water flow because of air compressibility, the Klinkenberg effect, variations in air density and viscosity that result from temperature fluctuations in the unsaturated zone and the possibility of inducing water movement during the pneumatic test. An analysis of these complicating factors reveals that, when induced water movement can be neglected, a linear version of the airflow equation can provide an appropriate approximation for the purpose of determining air-phase permeability. Two analytical solutions for steady state, two-dimensional, axisymmetric airflow to a single well partially screened in the unsaturated zone are developed. One solution applies where there is a stratum of relatively low air permeability, separating the stratum in which the well is completed, from the atmosphere. The other solution applies where there is no separating stratum between the domain and atmosphere. In both situations the water table forms the lower horizontal boundary. Applications of both solutions to determine air permeability from data collected during pneumatic tests are presented.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/91WR01655","usgsCitation":"Baehr, A.L., and Hult, M.F., 1991, Evaluation of unsaturated zone air permeability through pneumatic tests: Water Resources Research, v. 27, no. 10, p. 2605-2617, https://doi.org/10.1029/91WR01655.","productDescription":"13 p.","startPage":"2605","endPage":"2617","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":392,"text":"Minnesota Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":320136,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"10","noUsgsAuthors":false,"publicationDate":"2008-01-08","publicationStatus":"PW","scienceBaseUri":"57160536e4b0ef3b7ca91ff2","contributors":{"authors":[{"text":"Baehr, Arthur L.","contributorId":104523,"corporation":false,"usgs":true,"family":"Baehr","given":"Arthur","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":626886,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hult, Marc F.","contributorId":18344,"corporation":false,"usgs":true,"family":"Hult","given":"Marc","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":626887,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70125957,"text":"70125957 - 1991 - Hydrology of a riparian forested area on Boulder Creek","interactions":[],"lastModifiedDate":"2014-09-18T11:52:30","indexId":"70125957","displayToPublicDate":"1991-01-01T11:51:02","publicationYear":"1991","noYear":false,"publicationType":{"id":4,"text":"Book"},"publicationSubtype":{"id":12,"text":"Conference publication"},"title":"Hydrology of a riparian forested area on Boulder Creek","docAbstract":"No abstract available.","largerWorkTitle":"South Platte River resource management: Finding a balance","conferenceTitle":"South Platte River resource management: Finding a balance","conferenceDate":"1990-11-13T00:00:00","conferenceLocation":"Fort Collins, CO","language":"English","publisher":"Colorado State University","publisherLocation":"Fort Collins, CO","usgsCitation":"Martin, L., 1991, Hydrology of a riparian forested area on Boulder Creek, 1 p.","productDescription":"1 p.","additionalOnlineFiles":"1","costCenters":[],"links":[{"id":294140,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"541bf433e4b0e96537ddf72d","contributors":{"authors":[{"text":"Martin, L.J.","contributorId":73637,"corporation":false,"usgs":true,"family":"Martin","given":"L.J.","email":"","affiliations":[],"preferred":false,"id":501773,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70125956,"text":"70125956 - 1991 - Development of assessment methods for hydrologic impacts on western riparian ecosystems","interactions":[],"lastModifiedDate":"2014-09-18T11:49:17","indexId":"70125956","displayToPublicDate":"1991-01-01T11:48:24","publicationYear":"1991","noYear":false,"publicationType":{"id":4,"text":"Book"},"publicationSubtype":{"id":12,"text":"Conference publication"},"title":"Development of assessment methods for hydrologic impacts on western riparian ecosystems","docAbstract":"No abstract available.","largerWorkTitle":"South Platte River resource management: Finding a balance","conferenceTitle":"Colorado Water Resources Research Center, Colorado State University","conferenceDate":"1990-11-13T00:00:00","conferenceLocation":"Fort Collins, CO","language":"English","publisher":"Colorado Water Resources Research Center, Colorado State University","publisherLocation":"Fort Collins, CO","usgsCitation":"Ischinger, L.S., 1991, Development of assessment methods for hydrologic impacts on western riparian ecosystems, 1 p.","productDescription":"1 p.","numberOfPages":"1","costCenters":[],"links":[{"id":294139,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"541bf423e4b0e96537ddf682","contributors":{"authors":[{"text":"Ischinger, Lee S.","contributorId":34054,"corporation":false,"usgs":true,"family":"Ischinger","given":"Lee","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":501772,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70126196,"text":"70126196 - 1991 - Riparian vegetation of the Black Canyon of the Gunnison River, Colorado: composition and response to selected hydrologic regimes based on a direct gradient assessment model","interactions":[],"lastModifiedDate":"2014-09-19T11:30:45","indexId":"70126196","displayToPublicDate":"1991-01-01T11:26:18","publicationYear":"1991","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":9,"text":"Other Report"},"title":"Riparian vegetation of the Black Canyon of the Gunnison River, Colorado: composition and response to selected hydrologic regimes based on a direct gradient assessment model","docAbstract":"The Black Canyon of the Gunnison National Monument is located along the Gunnison River on the western slope of the Rocky Mountains in Montrose County, Colorado. The canyon is narrow because it is cut into resistant pre-Cambrian gneiss: it has a maximum depth of 900m and a minimum width of 300m from rim to rim (Hansen 1987). The watershed is 10,000 square km. A 450-m study reach was selected by the National Park Service (Fig. 1). The width of the canyon bottom within the study reach varies from 40 to 90 m, the gradient is 0.0128, and the elevation is approximately 1707 m. Average annual precipitation is 370 m (Colorado Climate Center 1984). Because of the steep canyon walls the study reach is inaccessible to livestock and has probably never been grazed.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Fort Collins, CO","collaboration":"Prepared by the U.S. Fish and Wildlife Service for the National Park Service.","usgsCitation":"Auble, G.T., Friedman, J.M., and Scott, M.L., 1991, Riparian vegetation of the Black Canyon of the Gunnison River, Colorado: composition and response to selected hydrologic regimes based on a direct gradient assessment model, 79 p.","productDescription":"79 p.","numberOfPages":"79","costCenters":[],"links":[{"id":294217,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Colorado","otherGeospatial":"Gunnison River","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -107.026538,38.503194 ], [ -107.026538,38.663596 ], [ -106.847142,38.663596 ], [ -106.847142,38.503194 ], [ -107.026538,38.503194 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"541d45a2e4b0f68901ec30e6","contributors":{"authors":[{"text":"Auble, Gregor T. 0000-0002-0843-2751 aubleg@usgs.gov","orcid":"https://orcid.org/0000-0002-0843-2751","contributorId":2187,"corporation":false,"usgs":true,"family":"Auble","given":"Gregor","email":"aubleg@usgs.gov","middleInitial":"T.","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":501906,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Friedman, Jonathan M. 0000-0002-1329-0663 friedmanj@usgs.gov","orcid":"https://orcid.org/0000-0002-1329-0663","contributorId":2473,"corporation":false,"usgs":true,"family":"Friedman","given":"Jonathan","email":"friedmanj@usgs.gov","middleInitial":"M.","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":501907,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Scott, Michael L. scottm@usgs.gov","contributorId":1169,"corporation":false,"usgs":true,"family":"Scott","given":"Michael","email":"scottm@usgs.gov","middleInitial":"L.","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":501905,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70198603,"text":"70198603 - 1991 - Effects of surfactants on the mobility of nonpolar organic contaminants in porous media","interactions":[],"lastModifiedDate":"2018-08-13T10:25:30","indexId":"70198603","displayToPublicDate":"1991-01-01T10:09:32","publicationYear":"1991","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Effects of surfactants on the mobility of nonpolar organic contaminants in porous media","docAbstract":"<p>No abstract available.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Organic substances and sediments in water","language":"English","publisher":"Lewis","publisherLocation":"Chelsea, Michigan","isbn":"9780873713429","usgsCitation":"Smith, J.A., Tucker, D., Jaffe, P., and Mueller, R., 1991, Effects of surfactants on the mobility of nonpolar organic contaminants in porous media, chap. <i>of</i> Organic substances and sediments in water, v. 1, p. 201-230.","productDescription":"30 p.","startPage":"201","endPage":"230","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":356378,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5c112477e4b034bf6a81dfa4","contributors":{"editors":[{"text":"Baker, R.","contributorId":11542,"corporation":false,"usgs":true,"family":"Baker","given":"R.","affiliations":[],"preferred":false,"id":742123,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Smith, J. A.","contributorId":101646,"corporation":false,"usgs":true,"family":"Smith","given":"J.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":742119,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tucker, D.","contributorId":71007,"corporation":false,"usgs":true,"family":"Tucker","given":"D.","email":"","affiliations":[],"preferred":false,"id":742120,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Jaffe, P. R.","contributorId":68464,"corporation":false,"usgs":true,"family":"Jaffe","given":"P. R.","affiliations":[],"preferred":false,"id":742121,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Mueller, R.T.","contributorId":6481,"corporation":false,"usgs":true,"family":"Mueller","given":"R.T.","email":"","affiliations":[],"preferred":false,"id":742122,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70125929,"text":"70125929 - 1991 - Response of plains cottonwood seeds and seedlings to simulated hydrologic regimes of the riparian zone","interactions":[],"lastModifiedDate":"2014-09-18T10:02:28","indexId":"70125929","displayToPublicDate":"1991-01-01T10:00:48","publicationYear":"1991","noYear":false,"publicationType":{"id":4,"text":"Book"},"publicationSubtype":{"id":12,"text":"Conference publication"},"title":"Response of plains cottonwood seeds and seedlings to simulated hydrologic regimes of the riparian zone","docAbstract":"No abstract available.","largerWorkTitle":"South Platte River resource management: Finding a balance","conferenceTitle":"South Platte River resource management: Finding a balance","conferenceDate":"1990-11-13T00:00:00","conferenceLocation":"Fort Collins, CO","language":"English","publisher":"Colorado Water Resources Research Center, Colorado State University","publisherLocation":"Fort Collins, CO","usgsCitation":"Segelquist, C., 1991, Response of plains cottonwood seeds and seedlings to simulated hydrologic regimes of the riparian zone, 1 p.","productDescription":"1 p.","numberOfPages":"1","costCenters":[],"links":[{"id":294109,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"541bf450e4b0e96537ddf846","contributors":{"authors":[{"text":"Segelquist, C.A.","contributorId":108410,"corporation":false,"usgs":true,"family":"Segelquist","given":"C.A.","affiliations":[],"preferred":false,"id":501712,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70199817,"text":"70199817 - 1991 - A thermodynamic partition model for binding of nonionic organic compounds by organic colloids and implications for their sorption to soils and sediment","interactions":[],"lastModifiedDate":"2018-10-01T09:33:57","indexId":"70199817","displayToPublicDate":"1991-01-01T09:31:11","publicationYear":"1991","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"A thermodynamic partition model for binding of nonionic organic compounds by organic colloids and implications for their sorption to soils and sediment","docAbstract":"<p>No abstract available.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Organic substances and sediments in water: Humics and soils","language":"English","publisher":"Lewis","publisherLocation":"Chelsea, Michigan","usgsCitation":"Chin, U., Weber, W.J., and Chiou, C.T., 1991, A thermodynamic partition model for binding of nonionic organic compounds by organic colloids and implications for their sorption to soils and sediment, chap. <i>of</i> Organic substances and sediments in water: Humics and soils, v. 1, p. 251-273.","productDescription":"23 p.","startPage":"251","endPage":"273","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":357926,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5c112477e4b034bf6a81dfa9","contributors":{"editors":[{"text":"Baker, R.A.","contributorId":146653,"corporation":false,"usgs":false,"family":"Baker","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":746778,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Chin, U.P.","contributorId":208337,"corporation":false,"usgs":false,"family":"Chin","given":"U.P.","email":"","affiliations":[],"preferred":false,"id":746775,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Weber, Walter J. Jr.","contributorId":189504,"corporation":false,"usgs":false,"family":"Weber","given":"Walter","suffix":"Jr.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":746776,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Chiou, C. T.","contributorId":97080,"corporation":false,"usgs":true,"family":"Chiou","given":"C.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":746777,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70199814,"text":"70199814 - 1991 - Parameters involved in modeling movement of bacteria in groundwater","interactions":[],"lastModifiedDate":"2018-10-01T08:44:03","indexId":"70199814","displayToPublicDate":"1991-01-01T08:40:42","publicationYear":"1991","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Parameters involved in modeling movement of bacteria in groundwater","docAbstract":"<p>No abstract available.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Modeling the environmental fate of microorganisms","language":"English","publisher":"American Society for Microbiology","publisherLocation":"Washington, D.C.","usgsCitation":"Harvey, R.W., 1991, Parameters involved in modeling movement of bacteria in groundwater, chap. <i>of</i> Modeling the environmental fate of microorganisms, p. 89-114.","productDescription":"26 p.","startPage":"89","endPage":"114","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":357923,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5c112478e4b034bf6a81dfab","contributors":{"editors":[{"text":"Hurst, C. J.","contributorId":206942,"corporation":false,"usgs":false,"family":"Hurst","given":"C.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":746772,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Harvey, Ronald W. 0000-0002-2791-8503 rwharvey@usgs.gov","orcid":"https://orcid.org/0000-0002-2791-8503","contributorId":564,"corporation":false,"usgs":true,"family":"Harvey","given":"Ronald","email":"rwharvey@usgs.gov","middleInitial":"W.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":746771,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70198692,"text":"70198692 - 1991 - Particulate and colloidal organic material in Pueblo Reservoir, Colorado--Influence of autochthonous source on chemical composition","interactions":[],"lastModifiedDate":"2018-08-15T08:01:35","indexId":"70198692","displayToPublicDate":"1991-01-01T07:53:21","publicationYear":"1991","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Particulate and colloidal organic material in Pueblo Reservoir, Colorado--Influence of autochthonous source on chemical composition","docAbstract":"<p>No abstract available.&nbsp;</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Organic substances and sediments in water","language":"English","publisher":"Lewis","publisherLocation":"Chelsea, Michigan","usgsCitation":"Ranville, J., Harnish, R., and McKnight, D., 1991, Particulate and colloidal organic material in Pueblo Reservoir, Colorado--Influence of autochthonous source on chemical composition, chap. <i>of</i> Organic substances and sediments in water, p. 47-73.","productDescription":"27 p.","startPage":"47","endPage":"73","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":356474,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Colorado","otherGeospatial":"Pueblo Reservoir ","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -104.930419921875,\n              38.16965396748852\n            ],\n            [\n              -104.63241577148438,\n              38.16965396748852\n            ],\n            [\n              -104.63241577148438,\n              38.351349509367836\n            ],\n            [\n              -104.930419921875,\n              38.351349509367836\n            ],\n            [\n              -104.930419921875,\n              38.16965396748852\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5c112478e4b034bf6a81dfaf","contributors":{"editors":[{"text":"Baker, R.A.","contributorId":146653,"corporation":false,"usgs":false,"family":"Baker","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":742597,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Ranville, J. F.","contributorId":54245,"corporation":false,"usgs":true,"family":"Ranville","given":"J. F.","affiliations":[],"preferred":false,"id":742594,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Harnish, R.A.","contributorId":44565,"corporation":false,"usgs":true,"family":"Harnish","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":742595,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McKnight, D.M.","contributorId":189736,"corporation":false,"usgs":false,"family":"McKnight","given":"D.M.","email":"","affiliations":[],"preferred":false,"id":742596,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70171501,"text":"70171501 - 1991 - The hydrogeologic framework of the Northern Coastal Province Aquifer System of Puerto Rico","interactions":[],"lastModifiedDate":"2016-06-01T16:24:27","indexId":"70171501","displayToPublicDate":"1991-01-01T05:30:00","publicationYear":"1991","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"The hydrogeologic framework of the Northern Coastal Province Aquifer System of Puerto Rico","largerWorkType":{"id":24,"text":"Conference Paper"},"largerWorkTitle":"Aquifers of the Caribbean Islands, Proceedings of the International Symposium on Tropical Hydrology","largerWorkSubtype":{"id":19,"text":"Conference Paper"},"conferenceTitle":"AWRA international symposium on Tropical hydrology","conferenceDate":"July 23-27, 1990","conferenceLocation":"San Juan, Puerto Rico","language":"English","publisher":"American Water Resources Association","publisherLocation":"Bethesda, MD","issn":"0894-847X","usgsCitation":"Rodriguez-Martinez, J., 1991, The hydrogeologic framework of the Northern Coastal Province Aquifer System of Puerto Rico, <i>in</i> Aquifers of the Caribbean Islands, Proceedings of the International Symposium on Tropical Hydrology, San Juan, Puerto Rico, July 23-27, 1990, p. 5-16.","productDescription":"12 p.","startPage":"5","endPage":"16","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":156,"text":"Caribbean Water Science Center","active":true,"usgs":true}],"links":[{"id":322058,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5750077ce4b0ee97d51bb7c5","contributors":{"editors":[{"text":"Gomez-Gomez, Fernando","contributorId":169637,"corporation":false,"usgs":false,"family":"Gomez-Gomez","given":"Fernando","email":"","affiliations":[],"preferred":false,"id":631347,"contributorType":{"id":2,"text":"Editors"},"rank":1},{"text":"Quinones-Aponte, Vicente","contributorId":48552,"corporation":false,"usgs":true,"family":"Quinones-Aponte","given":"Vicente","email":"","affiliations":[],"preferred":false,"id":631348,"contributorType":{"id":2,"text":"Editors"},"rank":2},{"text":"Johnson, A.I.","contributorId":82676,"corporation":false,"usgs":true,"family":"Johnson","given":"A.I.","email":"","affiliations":[],"preferred":false,"id":631349,"contributorType":{"id":2,"text":"Editors"},"rank":3}],"authors":[{"text":"Rodriguez-Martinez, Jesus jrodr@usgs.gov","contributorId":169873,"corporation":false,"usgs":false,"family":"Rodriguez-Martinez","given":"Jesus","email":"jrodr@usgs.gov","affiliations":[],"preferred":false,"id":631346,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70185805,"text":"70185805 - 1991 - Flame ionization mass spectrometry--Isotope ratio determinations for potassium","interactions":[],"lastModifiedDate":"2019-04-10T08:50:17","indexId":"70185805","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":847,"text":"Applied Spectroscopy","active":true,"publicationSubtype":{"id":10}},"title":"Flame ionization mass spectrometry--Isotope ratio determinations for potassium","docAbstract":"<p><span>The air/acetylene flame provides a convenient ion source for the determination of potassium isotopic ratios by mass spectrometry. Unlike the argon inductively coupled plasma (ICP), the flame provides low background in the mass region of interest. Ion production is quite satisfactory for isotope ratio measurements at the micrograms per milliliter (μg/mL) level and slightly below, with 1 μg/mL potassium giving about 10&lt;sup&gt;5&lt;/sup&gt;counts/second at a nominal mass-to-charge ratio of 39. The detection limit for potassium was 2-3 nanograms per milliliter (ng/mL). The ratio of &lt;sup&gt;41&lt;/sup&gt;K/&lt;sup&gt;39&lt;/sup&gt;K was measured with 0.5-1% relative standard deviation, and a &lt;sup&gt;41&lt;/sup&gt;K spike representing 0.2% of the total potassium was readily detected. Both signal levels and signal stability were improved by adding a second easily ionized element such as cesium to samples and standards. Alternatively, a cesium solution could be aspirated for about 1 minute between sample measurements to ensure signal stability.</span></p>","language":"English","publisher":"Sage","doi":"10.1366/0003702914336444","usgsCitation":"Taylor, H.E., Garbarino, J.R., and Koirtyohann, S.R., 1991, Flame ionization mass spectrometry--Isotope ratio determinations for potassium: Applied Spectroscopy, v. 45, no. 5, p. 886-886, https://doi.org/10.1366/0003702914336444.","productDescription":"1 p. ","startPage":"886","endPage":"886","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":338564,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":338563,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://www.osapublishing.org/as/abstract.cfm?uri=as-45-5-886"}],"volume":"45","issue":"5","noUsgsAuthors":false,"publicationDate":"1991-06-01","publicationStatus":"PW","scienceBaseUri":"58dcc81fe4b02ff32c685732","contributors":{"authors":[{"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":686777,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Garbarino, John R. jrgarb@usgs.gov","contributorId":2189,"corporation":false,"usgs":true,"family":"Garbarino","given":"John","email":"jrgarb@usgs.gov","middleInitial":"R.","affiliations":[{"id":5046,"text":"Branch of Analytical Serv (NWQL)","active":true,"usgs":true}],"preferred":true,"id":686778,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Koirtyohann, S. R.","contributorId":44287,"corporation":false,"usgs":true,"family":"Koirtyohann","given":"S.","middleInitial":"R.","affiliations":[],"preferred":false,"id":686779,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70016763,"text":"70016763 - 1991 - Solution of the one-dimensional consolidation theory equation with a pseudospectral method","interactions":[],"lastModifiedDate":"2016-05-25T16:06:40","indexId":"70016763","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Solution of the one-dimensional consolidation theory equation with a pseudospectral method","docAbstract":"<p>The one-dimensional consolidation theory equation is solved for an aquifer system using a pseudospectral method. The spatial derivatives are computed using Fast Fourier Transforms and the time derivative is solved using a fourth-order Runge-Kutta scheme. The computer model calculates compaction based on the void ratio changes accumulated during the simulated periods of time. Compactions and expansions resulting from groundwater withdrawals and recharges are simulated for two observation wells in Santa Clara Valley and two in San Joaquin Valley, California. Field data previously published are used to obtain mean values for the soil grain density and the compression index and to generate depth-dependent profiles for hydraulic conductivity and initial void ratio. The water-level plots for the wells studied were digitized and used to obtain the time dependent profiles of effective stress.</p>","largerWorkTitle":"IAHS Publication (International Association of Hydrological Sciences)","conferenceTitle":"Proceedings of the 4th International Symposium on Land Subsidence","conferenceDate":"12 May 1991 through 17 May 1991","conferenceLocation":"Houston, TX, USA","language":"English","publisher":"Publ by Int Assoc of Hydrological Sciences","publisherLocation":"Wallingford, United Kingdom","issn":"0144-7815","isbn":"0947571922","usgsCitation":"Sepulveda, N., 1991, Solution of the one-dimensional consolidation theory equation with a pseudospectral method, <i>in</i> IAHS Publication (International Association of Hydrological Sciences), no. 200, Houston, TX, USA, 12 May 1991 through 17 May 1991, p. 555-564.","productDescription":"10 p.","startPage":"555","endPage":"564","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":156,"text":"Caribbean Water Science Center","active":true,"usgs":true}],"links":[{"id":224849,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"200","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b925ae4b08c986b319e78","contributors":{"editors":[{"text":"Anon","contributorId":128316,"corporation":true,"usgs":false,"organization":"Anon","id":536350,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Sepulveda, N.","contributorId":56805,"corporation":false,"usgs":true,"family":"Sepulveda","given":"N.","email":"","affiliations":[],"preferred":false,"id":374432,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70016609,"text":"70016609 - 1991 - Use of electronic microprocessor-based instrumentation by the U.S. geological survey for hydrologic data collection","interactions":[],"lastModifiedDate":"2012-03-12T17:18:49","indexId":"70016609","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Use of electronic microprocessor-based instrumentation by the U.S. geological survey for hydrologic data collection","docAbstract":"The U.S. Geological Survey is acquiring a new generation of field computers and communications software to support hydrologic data-collection at field locations. The new computer hardware and software mark the beginning of the Survey's transition from the use of electromechanical devices and paper tapes to electronic microprocessor-based instrumentation. Software is being developed for these microprocessors to facilitate the collection, conversion, and entry of data into the Survey's National Water Information System. The new automated data-collection process features several microprocessor-controlled sensors connected to a serial digital multidrop line operated by an electronic data recorder. Data are acquired from the sensors in response to instructions programmed into the data recorder by the user through small portable lap-top or hand-held computers. The portable computers, called personal field computers, also are used to extract data from the electronic recorders for transport by courier to the office computers. The Survey's alternative to manual or courier retrieval is the use of microprocessor-based remote telemetry stations. Plans have been developed to enhance the Survey's use of the Geostationary Operational Environmental Satellite telemetry by replacing the present network of direct-readout ground stations with less expensive units. Plans also provide for computer software that will support other forms of telemetry such as telephone or land-based radio.","largerWorkTitle":"Proceedings - National Conference on Hydraulic Engineering","conferenceTitle":"Proceedings of the 1991 National Conference on Hydraulic Engineering","conferenceDate":"29 July 1991 through 2 August 1991","conferenceLocation":"Nashville, TN, USA","language":"English","publisher":"Publ by ASCE","publisherLocation":"New York, NY, United States","isbn":"0872628167","usgsCitation":"Shope, W.G., 1991, Use of electronic microprocessor-based instrumentation by the U.S. geological survey for hydrologic data collection, <i>in</i> Proceedings - National Conference on Hydraulic Engineering, Nashville, TN, USA, 29 July 1991 through 2 August 1991, p. 774-779.","startPage":"774","endPage":"779","numberOfPages":"6","costCenters":[],"links":[{"id":224838,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bbef6e4b08c986b3298af","contributors":{"editors":[{"text":"Shane Richard M.","contributorId":128320,"corporation":true,"usgs":false,"organization":"Shane Richard M.","id":536335,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Shope, William G. Jr.","contributorId":106649,"corporation":false,"usgs":true,"family":"Shope","given":"William","suffix":"Jr.","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":374026,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70176060,"text":"70176060 - 1991 - Compilation of hydrologic data for the Edwards aquifer, San Antonio area, Texas, 1990, with 1934–90 summary","interactions":[],"lastModifiedDate":"2016-08-24T11:51:18","indexId":"70176060","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":2,"text":"State or Local Government Series"},"seriesTitle":{"id":5177,"text":"Edwards Underground Water District Bulletin","active":true,"publicationSubtype":{"id":2}},"seriesNumber":"50","title":"Compilation of hydrologic data for the Edwards aquifer, San Antonio area, Texas, 1990, with 1934–90 summary","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"Edwards Underground Water District","usgsCitation":"Brown, D., Gilhousen, J.R., and Nalley, G., 1991, Compilation of hydrologic data for the Edwards aquifer, San Antonio area, Texas, 1990, with 1934–90 summary: Edwards Underground Water District Bulletin 50, 169 p.","productDescription":"169 p.","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":583,"text":"Texas Water Science Center","active":true,"usgs":true}],"links":[{"id":327798,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57c6aef7e4b0f2f0cebe4652","contributors":{"authors":[{"text":"Brown, D.S.","contributorId":28592,"corporation":false,"usgs":true,"family":"Brown","given":"D.S.","email":"","affiliations":[],"preferred":false,"id":646957,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gilhousen, Jon R.","contributorId":31016,"corporation":false,"usgs":true,"family":"Gilhousen","given":"Jon","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":646958,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nalley, G.M.","contributorId":23535,"corporation":false,"usgs":true,"family":"Nalley","given":"G.M.","email":"","affiliations":[],"preferred":false,"id":646959,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70016287,"text":"70016287 - 1991 - New hydrologic instrumentation in the U.S. Geological Survey","interactions":[],"lastModifiedDate":"2012-03-12T17:18:41","indexId":"70016287","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"New hydrologic instrumentation in the U.S. Geological Survey","docAbstract":"New water-level sensing and recording instrumentation is being used by the U.S. Geological Survey for monitoring water levels, stream velocities, and water-quality characteristics. Several of these instruments are briefly described. The Basic Data Recorder (BDR) is an electronic data logger, that interfaces to sensor systems through a serial-digital interface standard (SDI-12), which was proposed by the data-logger industry; the Incremental Shaft Encoder is an intelligent water-level sensor, which interfaces to the BDR through the SDI-12; the Pressure Sensor is an intelligent, nonsubmersible pressure sensor, which interfaces to the BDR through the SDI-12 and monitors water levels from 0 to 50 feet; the Ultrasonic Velocity Meter is an intelligent, water-velocity sensor, which interfaces to the BDR through the SDI-12 and measures the velocity across a stream up to 500 feet in width; the Collapsible Hand Sampler can be collapsed for insertion through holes in the ice and opened under the ice to collect a water sample; the Lighweight Ice Auger, weighing only 32 pounds, can auger 6- and 8-inch holes through approximately 3.5 feet of ice; and the Ice Chisel has a specially hardened steel blade and 6-foot long, hickory D-handle.","largerWorkTitle":"Cold Regions Engineering","conferenceTitle":"Sixth International Cold Regions Engineering Conference","conferenceDate":"26 February 1991 through 28 February 1991","conferenceLocation":"West Lebanon, NH, USA","language":"English","publisher":"Publ by ASCE","publisherLocation":"New York, NY, United States","isbn":"0872627985","usgsCitation":"Latkovich, V., and Shope, W., 1991, New hydrologic instrumentation in the U.S. Geological Survey, <i>in</i> Cold Regions Engineering, West Lebanon, NH, USA, 26 February 1991 through 28 February 1991, p. 739-747.","startPage":"739","endPage":"747","numberOfPages":"9","costCenters":[],"links":[{"id":222901,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6592e4b0c8380cd72c22","contributors":{"editors":[{"text":"Sodhi Devinder S.","contributorId":128371,"corporation":true,"usgs":false,"organization":"Sodhi Devinder S.","id":536325,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Latkovich, V.J.","contributorId":52576,"corporation":false,"usgs":true,"family":"Latkovich","given":"V.J.","email":"","affiliations":[],"preferred":false,"id":373084,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Shope, W.G.","contributorId":17272,"corporation":false,"usgs":true,"family":"Shope","given":"W.G.","email":"","affiliations":[],"preferred":false,"id":373083,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70185484,"text":"70185484 - 1991 - Formation and transport of deethylatrazine in the soil and vadose zone","interactions":[],"lastModifiedDate":"2017-03-22T13:54:01","indexId":"70185484","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2262,"text":"Journal of Environmental Quality","active":true,"publicationSubtype":{"id":10}},"title":"Formation and transport of deethylatrazine in the soil and vadose zone","docAbstract":"<p><span>Atrazine (2-chloro-4-ethylamino-6-isopropylamino-</span><i>s</i><span>-triazine) and two degradation products were monitored at seven depths in the soil and vadose zone throughout the growing season in two experimental plots in which corn (</span><i>Zea mays</i><span> L.) was grown. The soils in these plots were a Kimo silty clay loam (clayey over loamy, montmorillonitic, mesic, Fluvaquentic Hapludoll) and a Eudora silt loam (course, silty, mixed, mesic, Fluventic Hapludoll). The purpose this field study was to identify and quantify the mobile and persistent degradation products of atrazine that comprise the input, or “</span><i>source term</i><span>,” to groundwater resulting from the application of atrazine to the soils. The formation of deethylatrazine (2-amino-4-chloro-6-isopropylamino-</span><i>s</i><span>-triazine) and deisopropylatrazine (2-amino-4-chloro-6-ethylamino-</span><i>s</i><span>-triazine) was monitored at vurious depths using suction lysimeters to determine the relative proportions at which these compounds enter the aquifer. Deethylatrazine was the major degradation product of atrazine identified in the soil water and appeared to enter the underlying aquifer at a concentration of 5.0 </span><i>µ</i><span>g/L, which was greater than the concentration of atrazine entering the aquifer. Deisopropylatrazine also was detected in the soil water, bnt only in minor concentrations relative to atrazine and deethylatrazine. Because deethylatrazine was the major degradation product in the unsaturated zone, the deethylatrazine-to-atrazine ratio (DAR) may be a good indicator of transport of atrazine through the soil. The hypothesis is proposed that the DAR may be used to distinguish point-source from nonpoint-source contamination of an aquifer.</span></p>","language":"English","publisher":"Alliance of Crop, Soil and Environmental Science Societies ","doi":"10.2134/jeq1991.00472425002000030007x","usgsCitation":"Adams, C., and Thurman, E., 1991, Formation and transport of deethylatrazine in the soil and vadose zone: Journal of Environmental Quality, v. 20, no. 3, p. 540-547, https://doi.org/10.2134/jeq1991.00472425002000030007x.","productDescription":"8 p. ","startPage":"540","endPage":"547","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":338077,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"20","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58d38d61e4b0236b68f98f8a","contributors":{"authors":[{"text":"Adams, C.D.","contributorId":35135,"corporation":false,"usgs":true,"family":"Adams","given":"C.D.","email":"","affiliations":[],"preferred":false,"id":685703,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Thurman, E.M.","contributorId":102864,"corporation":false,"usgs":true,"family":"Thurman","given":"E.M.","affiliations":[],"preferred":false,"id":685704,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70016651,"text":"70016651 - 1991 - Sensitivity analysis of a ground-water-flow model","interactions":[],"lastModifiedDate":"2012-03-12T17:18:50","indexId":"70016651","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Sensitivity analysis of a ground-water-flow model","docAbstract":"A sensitivity analysis was performed on 18 hydrological factors affecting steady-state groundwater flow in the Upper Floridan aquifer near Albany, southwestern Georgia. Computations were based on a calibrated, two-dimensional, finite-element digital model of the stream-aquifer system and the corresponding data inputs. Flow-system sensitivity was analyzed by computing water-level residuals obtained from simulations involving individual changes to each hydrological factor. Hydrological factors to which computed water levels were most sensitive were those that produced the largest change in the sum-of-squares of residuals for the smallest change in factor value. Plots of the sum-of-squares of residuals against multiplier or additive values that effect change in the hydrological factors are used to evaluate the influence of each factor on the simulated flow system. The shapes of these 'sensitivity curves' indicate the importance of each hydrological factor to the flow system. Because the sensitivity analysis can be performed during the preliminary phase of a water-resource investigation, it can be used to identify the types of hydrological data required to accurately characterize the flow system prior to collecting additional data or making management decisions.","largerWorkTitle":"Symposium on Ground Water","conferenceTitle":"Proceedings of the International Symposium on Ground Water in Practice","conferenceDate":"29 July 1991 through 2 August 1991","conferenceLocation":"Nashville, TN, USA","language":"English","publisher":"Publ by ASCE","publisherLocation":"New York, NY, United States","isbn":"0872628175","usgsCitation":"Torak, L.J., 1991, Sensitivity analysis of a ground-water-flow model, <i>in</i> Symposium on Ground Water, Nashville, TN, USA, 29 July 1991 through 2 August 1991, p. 40-45.","startPage":"40","endPage":"45","numberOfPages":"6","costCenters":[],"links":[{"id":224648,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8d21e4b08c986b318288","contributors":{"editors":[{"text":"Lennon Gerard P.Rouhani Shahrokh","contributorId":128299,"corporation":true,"usgs":false,"organization":"Lennon Gerard P.Rouhani Shahrokh","id":536338,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Torak, Lynn J. ljtorak@usgs.gov","contributorId":401,"corporation":false,"usgs":true,"family":"Torak","given":"Lynn","email":"ljtorak@usgs.gov","middleInitial":"J.","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"preferred":true,"id":374136,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70016746,"text":"70016746 - 1991 - Overburden deformation and hydrologic changes due to longwall coal mine subsidence on the Illinois Basin","interactions":[],"lastModifiedDate":"2012-03-12T17:18:51","indexId":"70016746","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Overburden deformation and hydrologic changes due to longwall coal mine subsidence on the Illinois Basin","docAbstract":"Subsidence-induced deformation and hydrologic changes were studied at two active longwall coal mines in Illinois using surveying and geotechnical monitoring. Surface subsidence characteristics fall into a range common to other Illinois longwall operations. Subsidence-induced water level fluctuations correlated with mining activity and the passing of the dynamic subsidence wave. Aquifer thickness and lateral extent affect these fluctuations. Bedrock water levels completely recovered at site 1 and partially recovered at site 2. Comparison of pre-and post-subsidence logs showed increased fracture frequency and decreased seismic velocities in the overburden at site 1. Deformation monitoring at site 2 showed only small vertical differential displacements within the overburden, suggesting a nearly uniform drop of the subsided rock mass and a caved zone extending less than 6 m above the mine. Mechanisms of overburden deformation observed at both sites include bedding separations and shear within incompetent formations.","largerWorkTitle":"IAHS Publication (International Association of Hydrological Sciences)","conferenceTitle":"Proceedings of the 4th International Symposium on Land Subsidence","conferenceDate":"12 May 1991 through 17 May 1991","conferenceLocation":"Houston, TX, USA","language":"English","publisher":"Publ by Int Assoc of Hydrological Sciences","publisherLocation":"Wallingford, United Kingdom","isbn":"0947571922","usgsCitation":"Kelleher, J., Van Roosendaal, D.J., Mehnert, B., Brutcher, D., and Bauer, R., 1991, Overburden deformation and hydrologic changes due to longwall coal mine subsidence on the Illinois Basin, <i>in</i> IAHS Publication (International Association of Hydrological Sciences), no. 200, Houston, TX, USA, 12 May 1991 through 17 May 1991, p. 195-204.","startPage":"195","endPage":"204","numberOfPages":"10","costCenters":[],"links":[{"id":224605,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"200","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a71d1e4b0c8380cd76792","contributors":{"editors":[{"text":"Anon","contributorId":128316,"corporation":true,"usgs":false,"organization":"Anon","id":536347,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Kelleher, J.T.","contributorId":84085,"corporation":false,"usgs":true,"family":"Kelleher","given":"J.T.","email":"","affiliations":[],"preferred":false,"id":374384,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Van Roosendaal, D. J.","contributorId":41602,"corporation":false,"usgs":true,"family":"Van Roosendaal","given":"D.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":374383,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mehnert, B.B.","contributorId":106647,"corporation":false,"usgs":true,"family":"Mehnert","given":"B.B.","email":"","affiliations":[],"preferred":false,"id":374387,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Brutcher, D.F.","contributorId":87304,"corporation":false,"usgs":true,"family":"Brutcher","given":"D.F.","email":"","affiliations":[],"preferred":false,"id":374385,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Bauer, R.A.","contributorId":102599,"corporation":false,"usgs":true,"family":"Bauer","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":374386,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70179842,"text":"70179842 - 1991 - Response of Ned Wilson Lake watershed, Colorado, to changes in atmospheric deposition of sulfate","interactions":[],"lastModifiedDate":"2018-02-27T12:04:36","indexId":"70179842","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Response of Ned Wilson Lake watershed, Colorado, to changes in atmospheric deposition of sulfate","docAbstract":"<p><span>The Ned Wilson Lake watershed responds directly and rapidly to changes in precipitation inputs of sulfate, which has important implications for effects of acid deposition on the aquatic system. Chemistry at three precipitation collection sites and three watershed sites (a pond, a lake, and a spring) has been monitored in and near the Flattops Wilderness Area in northwestern Colorado beginning in 1981–1983. Bulk snowpack concentration of sulfate in the watershed and volume-weighted annual mean concentration of sulfate in precipitation at two nearby sites generally decreased from 1981 to 1985, were small through 1987, and increased in 1988–1989. Changes in concentration of sulfate at the watershed sites are controlled by precipitation inputs. Responsiveness of the individual sites was dependent on their position along the hydrologic flow path. The fastest response was in the pond, which has a hydrologic residence time of less than 1 year; over 90% of the variance in concentration of sulfate in the pond was explained by changes in concentration in precipitation. The lake has a hydrologic residence time of 1 to 4 years; a regression model of the concentration of sulfate in the lake, as a function of the concentration in the lake during the previous year and the concentration in precipitation, explained 87% of the variance in concentration of sulfate in the lake. The hydrologic response time of the spring is unknown; it was not responsive to changes in concentration of sulfate in precipitation. The recent increase of sulfate concentration in precipitation and in the pond and lake is evidence for a rapid rather than a delayed response, which could not be determined when only a decreasing trend in sulfate concentration was reported in 1982–1987. Watersheds of this type are sensitive to acidification (acid-neutralizing capacity less than 60 μeq L</span><sup>−1</sup><span>), and these results indicate conservative behavior of sulfate. This is important in predicting effects of future changes in atmospheric deposition, which could potentially be caused by anthropogenic emissions or climatic change.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/91WR01189","usgsCitation":"Campbell, D.H., Turk, J.T., and Spahr, N.E., 1991, Response of Ned Wilson Lake watershed, Colorado, to changes in atmospheric deposition of sulfate: Water Resources Research, v. 27, no. 8, p. 2047-2060, https://doi.org/10.1029/91WR01189.","productDescription":"14 p.","startPage":"2047","endPage":"2060","costCenters":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true}],"links":[{"id":333405,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Colorado","otherGeospatial":"Ned Wilson Lake watershed","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -107.25,\n              39.91667\n            ],\n            [\n              -107.5,\n              39.91667\n            ],\n            [\n              -107.5,\n              40.01667\n            ],\n            [\n              -107.25,\n              40.01667\n            ],\n            [\n              -107.25,\n              39.91667\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"27","issue":"8","noUsgsAuthors":false,"publicationDate":"2008-01-08","publicationStatus":"PW","scienceBaseUri":"58808de2e4b01dfadfff15db","contributors":{"authors":[{"text":"Campbell, Donald H. dhcampbe@usgs.gov","contributorId":1670,"corporation":false,"usgs":true,"family":"Campbell","given":"Donald","email":"dhcampbe@usgs.gov","middleInitial":"H.","affiliations":[],"preferred":true,"id":658909,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Turk, John T.","contributorId":53363,"corporation":false,"usgs":true,"family":"Turk","given":"John","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":658910,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"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":658911,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70185486,"text":"70185486 - 1991 - Fate of silicate minerals in a peat bog","interactions":[],"lastModifiedDate":"2022-12-22T15:49:43.43597","indexId":"70185486","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Fate of silicate minerals in a peat bog","docAbstract":"<p id=\"p-1\">An investigation of silicate weathering in a Minnesota mire indicates that quartz and aluminosilicates rapidly dissolve in anoxic, organic-rich, neutral- pH environments. Vertical profiles of pH, dissolved silicon, and major cations were obtained at a raised bog and a spring fen and compared. Profiles of readily extractable silicon, diatom abundance, ash mineralogy, and silicate surface texture were determined from peat cores collected at each site.</p><p id=\"p-2\">In the bog, normally a recharge mound, dissolved silicon increases with depth as pH increases, exceeding the background silicon concentration by a factor of two. Silicate grain surfaces, including quartz, are chemically etched at this location, despite being in contact with pore water at neutral pH with dissolved silicon well above the equilibrium solubility of quartz. The increasing silica concentrations at circum-neutral pH are consistent with a system where silicate solubility is influenced by silica-organic-acid complexes. Silica-organic-acid complexes therefore may be the cause of the almost complete absence of diatoms in decomposed peat and contribute to the formation of silica-depleted underclays commonly found beneath coal.</p>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0091-7613(1991)019<0328:FOSMIA>2.3.CO;2","usgsCitation":"Bennett, P.C., Siegel, D., Hillier, B.M., and Glaser, P.H., 1991, Fate of silicate minerals in a peat bog: Geology, v. 19, no. 4, p. 328-331, https://doi.org/10.1130/0091-7613(1991)019<0328:FOSMIA>2.3.CO;2.","productDescription":"4 p.","startPage":"328","endPage":"331","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":338079,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Minnesota","otherGeospatial":"Lost River peatland","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -94.48107716216364,\n              48.20103577453631\n            ],\n            [\n              -94.48107716216364,\n              48.1257567119583\n            ],\n            [\n              -94.34359226272942,\n              48.1257567119583\n            ],\n            [\n              -94.34359226272942,\n              48.20103577453631\n            ],\n            [\n              -94.48107716216364,\n              48.20103577453631\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"19","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58d38d61e4b0236b68f98f88","contributors":{"authors":[{"text":"Bennett, Philip C.","contributorId":30567,"corporation":false,"usgs":true,"family":"Bennett","given":"Philip","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":685706,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Siegel, Donald I.","contributorId":97499,"corporation":false,"usgs":true,"family":"Siegel","given":"Donald I.","affiliations":[],"preferred":false,"id":685707,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hillier, Barbara M.","contributorId":19026,"corporation":false,"usgs":true,"family":"Hillier","given":"Barbara","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":685708,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Glaser, Paul H.","contributorId":178129,"corporation":false,"usgs":false,"family":"Glaser","given":"Paul","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":685709,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70185801,"text":"70185801 - 1991 - Downstream effects of mine effluent on an intermontane riparian system","interactions":[],"lastModifiedDate":"2019-04-10T08:53:56","indexId":"70185801","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1169,"text":"Canadian Journal of Fisheries and Aquatic Sciences","active":true,"publicationSubtype":{"id":10}},"title":"Downstream effects of mine effluent on an intermontane riparian system","docAbstract":"<p><span>Metal concentrations were determined in benthic biota, fish livers, water, and fine-grained sediment through 215 km of an intermontane river system (Blackfoot River, Montana, USA) affected by headwater inputs of acid-mine effluent. Solute and particulate contaminants decreased rapidly downstream from headwater sources, but some extended through an extensive marsh system. Particulate contaminants penetrated through the marsh system, effectively resulting in food web contamination downstream of the marshes. Metals differed in their bioavailability within and below the marsh system. Cadmium was most consistently accumulated in the food web, and the general order of downstream mobilization of bioavailable metals appears to be Cd, Zn &gt; Cu &gt; As, Ni. Depauperate benthic communities and reduced fish populations occurred coincident with the sediment contamination.</span></p>","language":"English","publisher":"NRC Research Press","doi":"10.1139/f91-030","usgsCitation":"Moore, J.N., Luoma, S.N., and Peters, D., 1991, Downstream effects of mine effluent on an intermontane riparian system: Canadian Journal of Fisheries and Aquatic Sciences, v. 48, no. 2, p. 222-232, https://doi.org/10.1139/f91-030.","productDescription":"11 p. ","startPage":"222","endPage":"232","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":338557,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"48","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58dcc81fe4b02ff32c685734","contributors":{"authors":[{"text":"Moore, Johnnie N.","contributorId":102532,"corporation":false,"usgs":true,"family":"Moore","given":"Johnnie","email":"","middleInitial":"N.","affiliations":[],"preferred":false,"id":686767,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Luoma, Samuel N. 0000-0001-5443-5091 snluoma@usgs.gov","orcid":"https://orcid.org/0000-0001-5443-5091","contributorId":2287,"corporation":false,"usgs":true,"family":"Luoma","given":"Samuel","email":"snluoma@usgs.gov","middleInitial":"N.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":686768,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Peters, Donald","contributorId":190006,"corporation":false,"usgs":false,"family":"Peters","given":"Donald","email":"","affiliations":[],"preferred":false,"id":686769,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70185495,"text":"70185495 - 1991 - Reduction of nitrate in aquifer microcosms by carbon additions","interactions":[],"lastModifiedDate":"2017-03-22T14:50:44","indexId":"70185495","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2262,"text":"Journal of Environmental Quality","active":true,"publicationSubtype":{"id":10}},"title":"Reduction of nitrate in aquifer microcosms by carbon additions","docAbstract":"<p><span>Aquifer microcosms were used to examine the effects of NO</span><sup>−</sup><sub>3</sub><span> and C amendments on groundwater from the Claiborne aquifer. Nitrate concentrations of 12.17 mg L</span><sup>−1</sup><span> in aquifer microcosms were reduced 0.92%/d to 5.84 mg L</span><sup>−1</sup><span> by the addition of 10 mg C L</span><sup>−1</sup><span> for 35 d. Nitrate disappearance correlated with increases in number of denitrifiers and dissolved N</span><sub>2</sub><span>O concentration and decreases in dissolved oxygen, suggesting biological denitrification. Nitrate/chloride ratios decreased in microcosms with 10 mg C L</span><sup>−1</sup><span> added and then increased when the C addition was removed. Carbon additions of 0.4 mg C L</span><sup>−1</sup><span> had no effect on the microbial or chemical properties of the microcosms. Nitrous oxide levels in wells sampling the Claiborne aquifer showed an increase with depth, indicating N</span><sub>2</sub><span>O production within the aquifer. Microcosms are useful tools to examine biological transformations of chemical contaminants in unconsolidated aquifer material. The remediation of NO</span><sup>−</sup><sub>3</sub><span> contaminated aquifers by organic infusion is possible and appears to be a function of microbial denitrification.</span></p>","language":"English","publisher":"Alliance of Crop, Soil, and Environmental Science Societies ","doi":"10.2134/jeq1991.00472425002000010041x","usgsCitation":"Obenhuber, D.C., and Lowrance, R., 1991, Reduction of nitrate in aquifer microcosms by carbon additions: Journal of Environmental Quality, v. 20, no. 1, p. 255-258, https://doi.org/10.2134/jeq1991.00472425002000010041x.","productDescription":"4 p. ","startPage":"255","endPage":"258","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":338093,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"20","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58d38d61e4b0236b68f98f86","contributors":{"authors":[{"text":"Obenhuber, Donald C.","contributorId":189695,"corporation":false,"usgs":false,"family":"Obenhuber","given":"Donald","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":685734,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lowrance, Richard","contributorId":189696,"corporation":false,"usgs":false,"family":"Lowrance","given":"Richard","email":"","affiliations":[],"preferred":false,"id":685735,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
]}