{"pageNumber":"472","pageRowStart":"11775","pageSize":"25","recordCount":16502,"records":[{"id":70125928,"text":"70125928 - 1991 - Atmospheric deposition and solute export in giant sequoia: Mixed conifer watersheds in the Sierra Nevada, California","interactions":[],"lastModifiedDate":"2023-08-25T16:10:17.603735","indexId":"70125928","displayToPublicDate":"1991-03-01T09:52:23","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1007,"text":"Biogeochemistry","active":true,"publicationSubtype":{"id":10}},"title":"Atmospheric deposition and solute export in giant sequoia: Mixed conifer watersheds in the Sierra Nevada, California","docAbstract":"<p><span>Atmospheric depostion and stream discharge and solutes were measured for three years (September 1984 — August 1987) in two mixed conifer watersheds in Sequoia National Park, in the southern Sierra Nevada of California. The Log Creek watershed (50 ha, 2067–2397 m elev.) is drained by a perennial stream, while Tharp's Creek watershed (13 ha, 2067–2255 m elev.) contains an intermittent stream. Dominant trees in the area include&nbsp;</span><i>Abies concolor</i><span>&nbsp;(white fir),&nbsp;</span><i>Sequoiadendron giganteum</i><span>&nbsp;(giant sequoia),&nbsp;</span><i>A. magnifica</i><span>&nbsp;(red fir), and&nbsp;</span><i>Pinus lambertiana</i><span>&nbsp;(sugar pine). Bedrock is predominantly granite and granodiorite, and the soils are mostly Pachic Xerumbrepts. Over the three year period, sulfate (SO</span><sub>4</sub><span>&nbsp;</span><sup>2−</sup><span>), nitrate (NO</span><sub>3</sub><span>&nbsp;</span><sup>−</sup><span>), and chloride (Cl</span><sup>−1</sup><span>) were the major anions in bulk precipitation with volume-weighted average concentrations of 12.6, 12.3 and 10.0 μeq/1, respectively. Annual inputs of NO</span><sub>3</sub><span>-N, NH</span><sub>4</sub><span>-N and SO</span><sub>4</sub><span>-S from wet deposition were about 60 to 75% of those reported from bulk deposition collectors. Discharge from the two watersheds occurs primarily during spring snowmelt. Solute exports from Log and Tharp's Creeks were dominated by HCO</span><sub>3</sub><span>&nbsp;</span><sup>−</sup><span>, Ca</span><sup>2+</sup><span>&nbsp;and Na</span><sup>+</sup><span>, while H</span><sup>+</sup><span>, NO</span><sub>3</sub><span>&nbsp;</span><sup>−</sup><span>, NH</span><sub>4</sub><span>&nbsp;</span><sup>+</sup><span>&nbsp;and PO</span><sub>4</sub><span>&nbsp;</span><sup>3−</sup><span>&nbsp;outputs were relatively small. Solute concentrations were weakly correlated with instantaneous stream flow for all solutes (r</span><sup>2</sup><span>&nbsp;&lt;0.2) except HCO</span><sub>3</sub><span>&nbsp;</span><sup>−</sup><span>&nbsp;(Log Cr. r</span><sup>2</sup><span>&nbsp;= 0.72; Tharp's Cr. r</span><sup>2</sup><span>&nbsp;= 0.38), Na</span><sup>+</sup><span>&nbsp;(Log Cr. r</span><sup>2</sup><span>&nbsp;= 0.56; Tharp's Cr. r</span><sup>2</sup><span>&nbsp;= 0.47), and silicate (Log Cr. r</span><sup>2</sup><span>&nbsp;= 0.71; Tharp's Cr. r</span><sup>2</sup><span>&nbsp;= 0.49). Mean annual atmospheric contributions of NO</span><sub>3</sub><span>-N (1.6 kg ha</span><sup>−1</sup><span>), NH</span><sub>4</sub><span>-N (1.7 kg ha</span><sup>−1</sup><span>), and SO</span><sub>4</sub><span>-S (1.8 kg ha</span><sup>−1</sup><span>), which are associated with acidic deposition, greatly exceed hydrologic losses. Annual watershed yields (expressed as eq ha</span><sup>−1</sup><span>) of HCO</span><sub>3</sub><span>&nbsp;</span><sup>−</sup><span>&nbsp;exceeded by factors of 2.5 to 37 the annual atmospheric deposition of H</span><sup>+</sup><span>.</span></p>","language":"English","publisher":"Springer","doi":"10.1007/BF00002608","usgsCitation":"Stohlgren, T.J., Melack, J., Esperanza, A.M., and Parsons, D.J., 1991, Atmospheric deposition and solute export in giant sequoia: Mixed conifer watersheds in the Sierra Nevada, California: Biogeochemistry, v. 12, no. 3, p. 207-230, https://doi.org/10.1007/BF00002608.","productDescription":"24 p.","startPage":"207","endPage":"230","numberOfPages":"24","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":294106,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Sierra Nevada","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -119.585302,37.721679 ], [ -119.585302,37.739329 ], [ -119.553287,37.739329 ], [ -119.553287,37.721679 ], [ -119.585302,37.721679 ] ] ] } } ] }","volume":"12","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"541bf41ce4b0e96537ddf635","contributors":{"authors":[{"text":"Stohlgren, Thomas J. 0000-0001-9696-4450 stohlgrent@usgs.gov","orcid":"https://orcid.org/0000-0001-9696-4450","contributorId":2902,"corporation":false,"usgs":true,"family":"Stohlgren","given":"Thomas","email":"stohlgrent@usgs.gov","middleInitial":"J.","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":501708,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Melack, John M.","contributorId":25481,"corporation":false,"usgs":true,"family":"Melack","given":"John M.","affiliations":[],"preferred":false,"id":501709,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Esperanza, Anne M.","contributorId":56165,"corporation":false,"usgs":true,"family":"Esperanza","given":"Anne","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":501711,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Parsons, David J.","contributorId":39249,"corporation":false,"usgs":true,"family":"Parsons","given":"David","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":501710,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70171494,"text":"70171494 - 1991 - Structure and depositional patterns and their influence on the hydraulic conductivity of fan-deltas in southern Puerto Rico","interactions":[],"lastModifiedDate":"2016-06-01T15:40:28","indexId":"70171494","displayToPublicDate":"1991-03-01T07:45:00","publicationYear":"1991","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Structure and depositional patterns and their influence on the hydraulic conductivity of fan-deltas in southern 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":"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":"Renken, R.A., Gomez-Gomez, F., Quinones-Aponte, V., and Dacosta, R., 1991, Structure and depositional patterns and their influence on the hydraulic conductivity of fan-deltas in southern 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. 25-36.","productDescription":"12 p.","startPage":"25","endPage":"36","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":156,"text":"Caribbean Water Science Center","active":true,"usgs":true}],"links":[{"id":322045,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57500776e4b0ee97d51bb746","contributors":{"editors":[{"text":"Gomez-Gomez, Fernando","contributorId":169637,"corporation":false,"usgs":false,"family":"Gomez-Gomez","given":"Fernando","email":"","affiliations":[],"preferred":false,"id":631310,"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":631311,"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":631312,"contributorType":{"id":2,"text":"Editors"},"rank":3}],"authors":[{"text":"Renken, Robert A. rarenken@usgs.gov","contributorId":269,"corporation":false,"usgs":true,"family":"Renken","given":"Robert","email":"rarenken@usgs.gov","middleInitial":"A.","affiliations":[],"preferred":true,"id":631306,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gomez-Gomez, Fernando","contributorId":169637,"corporation":false,"usgs":false,"family":"Gomez-Gomez","given":"Fernando","email":"","affiliations":[],"preferred":false,"id":631307,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Quinones-Aponte, Vicente","contributorId":48552,"corporation":false,"usgs":true,"family":"Quinones-Aponte","given":"Vicente","email":"","affiliations":[],"preferred":false,"id":631308,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dacosta, Rafael","contributorId":93060,"corporation":false,"usgs":true,"family":"Dacosta","given":"Rafael","email":"","affiliations":[],"preferred":false,"id":631309,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"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":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","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":70016731,"text":"70016731 - 1991 - Simulation of vertical compaction in models of regional ground-water flow","interactions":[],"lastModifiedDate":"2012-03-12T17:18:48","indexId":"70016731","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Simulation of vertical compaction in models of regional ground-water flow","docAbstract":"A new computer program was developed to simulate vertical compaction in models of regional ground-water flow. The program accounts for ground-water storage changes and compaction in discontinuous interbeds or in extensive confining beds. The new program is a package for the U.S. Geological Survey modular finite-difference ground-water flow model. Several features of the program make it useful for application in shallow unconfined flow systems. Geostatic load can be treated as a function of water-table elevation, and compaction is a function of computed changes in effective stress at the center of a model layer. Thickness of compressible sediments in an unconfined model layer can vary in proportion to saturated thickness. The new package was tested by comparison with an existing model of one-dimensional compaction.","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":"Leake, S.A., 1991, Simulation of vertical compaction in models of regional ground-water flow, <i>in</i> IAHS Publication (International Association of Hydrological Sciences), no. 200, Houston, TX, USA, 12 May 1991 through 17 May 1991, p. 565-574.","startPage":"565","endPage":"574","numberOfPages":"10","costCenters":[],"links":[{"id":225179,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"200","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b90b8e4b08c986b319645","contributors":{"editors":[{"text":"Anon","contributorId":128316,"corporation":true,"usgs":false,"organization":"Anon","id":536344,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Leake, S. A.","contributorId":52164,"corporation":false,"usgs":true,"family":"Leake","given":"S.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":374339,"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":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":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":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":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":70016468,"text":"70016468 - 1991 - Use of a single-bowl continuous-flow centrifuge for dewatering suspended sediments: effect on sediment physical and chemical characteristics","interactions":[],"lastModifiedDate":"2024-03-28T00:14:53.430863","indexId":"70016468","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1924,"text":"Hydrological Processes","active":true,"publicationSubtype":{"id":10}},"title":"Use of a single-bowl continuous-flow centrifuge for dewatering suspended sediments: effect on sediment physical and chemical characteristics","docAbstract":"<div class=\"abstract-group \"><div class=\"article-section__content en main\"><p>The use of a single-bowl continuous-flow centrifuge (CFC, Sharples-Pennwalt Model AS-12) for dewatering suspended sediment from large volumes of river water is evaluated. Sediment-recovery efficiency of 86-91 per cent is comparable to that of other types of CFC units. The recovery efficiency is limited by the particle-size distribution of the feed water and by the limiting particle diameter that is retained in the centrifuge bowl. The limiting particle diameter, using the parameters for this study (bowl radius = 10.5cm; bowl length = 71.1 cm; rotational velocity = 16000 r min<sup>−1</sup>; flow rate = 2 L min<sup>−1</sup>, and an assumed hydrated particle density = 1.7 gm cm<sup>−3</sup>), is 370 nm. There seems to be no particle-size fractionation within the centrifuge bowl—the median particle size was the same at the top as at the bottom. Particle electrophoretic mobility plays some role in fractionation of particles within the centrifuge. The mobility ranged from −1.19 to −2.01 × 10<sup>−8</sup><span>&nbsp;</span>m<sup>2</sup><span>&nbsp;</span>V<sup>−1</sup><span>&nbsp;</span>s<sup>−1</sup>, which is typical of clays coated with organic matter, the charge of which is partially neutralized by divalent cations and iron. Contamination by trace metals and organics is minimized by coating all surfaces that come in contact with the sample with either FEP or PFA Teflon and using a removable FEP Teflon liner in the centrifuge bowl. Because of the physical and chemical factors affecting particle fractionation within the centrifuge, care must be exercised in interpreting the environmental consequences of particles collected by continuous-flow centrifugation.</p></div></div>","language":"English","publisher":"Wiley","doi":"10.1002/hyp.3360050207","issn":"08856087","usgsCitation":"Rees, T., Leenheer, J., and Ranville, J., 1991, Use of a single-bowl continuous-flow centrifuge for dewatering suspended sediments: effect on sediment physical and chemical characteristics: Hydrological Processes, v. 5, no. 2, p. 201-214, https://doi.org/10.1002/hyp.3360050207.","productDescription":"14 p.","startPage":"201","endPage":"214","numberOfPages":"14","costCenters":[],"links":[{"id":223218,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"5","issue":"2","noUsgsAuthors":false,"publicationDate":"2006-09-26","publicationStatus":"PW","scienceBaseUri":"505bbe9ee4b08c986b3296bc","contributors":{"authors":[{"text":"Rees, T.F.","contributorId":26068,"corporation":false,"usgs":true,"family":"Rees","given":"T.F.","email":"","affiliations":[],"preferred":false,"id":373630,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Leenheer, J.A.","contributorId":75123,"corporation":false,"usgs":true,"family":"Leenheer","given":"J.A.","affiliations":[],"preferred":false,"id":373632,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ranville, J. F.","contributorId":54245,"corporation":false,"usgs":true,"family":"Ranville","given":"J. F.","affiliations":[],"preferred":false,"id":373631,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70016467,"text":"70016467 - 1991 - Seismicity and shear strain in the southern Great Basin of Nevada and California","interactions":[],"lastModifiedDate":"2024-04-30T11:23:13.784988","indexId":"70016467","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2312,"text":"Journal of Geophysical Research","active":true,"publicationSubtype":{"id":10}},"title":"Seismicity and shear strain in the southern Great Basin of Nevada and California","docAbstract":"<div class=\" metis-abstract\"><div class=\"article-section__content en main\"><p>This study examines the relationship between the distribution of small earthquakes (M<sub>L</sub>≤4.3) and mechanisms of strain accumulation and relaxation in an area with long repeat times between large events, the Southern Great Basin Seismic Network (SGBSN) region. The Great Basin is a unique continental extensional province characterized by normal and strike-slip faulting, high heat flow, crust of thin to normal thickness, and high elevations. The SGBSN is operated to provide data to address suitability issues pertaining to Yucca Mountain, Nevada which is being evaluated as a potential site for a national mined geologic nuclear waste repository. Suitability issues include estimation of the probability of occurrence of future damaging earthquakes, the characterization of the mechanisms that drive hydrologic flow, and the identification of fractures (faults) that might act as flow conduits or barriers. This study attempts to explain the distribution of small earthquakes in terms of spatial variations in the shear strain field; where strain concentrates there should be a greater number of small earthquakes. Strain field models are constructed under the assumption that long term fault behavior perturbs an otherwise uniform strain field. These strain field models are then interpreted with regard to the regional tectonics and site suitability issues. Modeling results provide one possible explanation of why earthquake clusters cover regions much larger than the surface projections of any of mapped major faults; clusters in a wide band along and extending northeast of the northern half of the Furnace Creek fault may correspond to elevated shear strains along the fault and a broad cluster in the Pahranagat Shear Zone may be associated with shear strain arising from a distribution of smaller localized faults. The relatively large number of small earthquakes in the southern and eastern portions of the Nevada Test Site is consistent with the strain field models. A minimum in shear strain at Yucca Mountain is predicted by all models consistent with an almost total lack of earthquakes observed there. The region to the west of the Death Valley/Furnace Creek fault system, the portion of the study area with the most active deformation but few small earthquakes, is an area of low shear strain. A possible reason for this is that the fault configuration in the area is optimal for accommodating regional deformation via large earthquakes or creep. While there is also a relative lack of earthquakes at Yucca Mountain, this may be indicative of a lack of accumulating strain energy and thus, a lower potential for a large earthquake.</p></div></div>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/91JB01576","issn":"01480227","usgsCitation":"Gomberg, J., 1991, Seismicity and shear strain in the southern Great Basin of Nevada and California: Journal of Geophysical Research, v. 96, no. B10, p. 16383-16399, https://doi.org/10.1029/91JB01576.","productDescription":"17 p.","startPage":"16383","endPage":"16399","costCenters":[],"links":[{"id":223174,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"96","issue":"B10","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505b8b8fe4b08c986b31791c","contributors":{"authors":[{"text":"Gomberg, J.","contributorId":95994,"corporation":false,"usgs":true,"family":"Gomberg","given":"J.","email":"","affiliations":[],"preferred":false,"id":373629,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70016448,"text":"70016448 - 1991 - Importance of geologic characterization of potential low-level radioactive waste disposal sites","interactions":[],"lastModifiedDate":"2012-03-12T17:18:44","indexId":"70016448","displayToPublicDate":"1991-01-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1540,"text":"Environmental Geology and Water Sciences","active":true,"publicationSubtype":{"id":10}},"title":"Importance of geologic characterization of potential low-level radioactive waste disposal sites","docAbstract":"Using the example of the Geff Alternative Site in Wayne County, Illinois, for the disposal of low-level radioactive waste, this paper demonstrates, from a policy and public opinion perspective, the importance of accurately determining site stratigraphy. Complete and accurate characterization of geologic materials and determination of site stratigraphy at potential low-level waste disposal sites provides the frame-work for subsequent hydrologic and geochemical investigations. Proper geologic characterization is critical to determine the long-term site stability and the extent of interactions of groundwater between the site and its surroundings. Failure to adequately characterize site stratigraphy can lead to the incorrect evaluation of the geology of a site, which in turn may result in a lack of public confidence. A potential problem of lack of public confidence was alleviated as a result of the resolution and proper definition of the Geff Alternative Site stratigraphy. The integrity of the investigation was not questioned and public perception was not compromised. ?? 1991 Springer-Verlag New York Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Geology and Water Sciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF01740476","issn":"01775146","usgsCitation":"Weibel, C., and Berg, R.C., 1991, Importance of geologic characterization of potential low-level radioactive waste disposal sites: Environmental Geology and Water Sciences, v. 18, no. 3, p. 209-214, https://doi.org/10.1007/BF01740476.","startPage":"209","endPage":"214","numberOfPages":"6","costCenters":[],"links":[{"id":205340,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF01740476"},{"id":223118,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"18","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3939e4b0c8380cd61850","contributors":{"authors":[{"text":"Weibel, C.P.","contributorId":33851,"corporation":false,"usgs":true,"family":"Weibel","given":"C.P.","email":"","affiliations":[],"preferred":false,"id":373563,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Berg, R. C.","contributorId":11673,"corporation":false,"usgs":true,"family":"Berg","given":"R.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":373562,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
]}