Water-chemistry data from the Edwards aquifer for 1976-85, consisting of nearly 1,500 chemical analyses from 280 wells and 3 springs, were used to statistically evaluate relations among ground-water chemistry, hydrogeology, and land use. Five land uses associated with sampled wells were classified on the basis of published information and field surveys. Four major subareas of the aquifer were defined to reflect the relative susceptibility of ground water to contamination originating from human activities using hydrogeologic and tritium data.
\nWater from an agricultural area over the unconfined zone of the aquifer had the largest median concentration of nitrite plus nitrate. Large nitrite plus nitrate concentrations were spatially associated with large tritium concentrations and nitrogen isotopic ratios characteristic of streamflow recharge. Detections of fecal-coliform bacteria were associated mainly with water from wells completed in the unconfined zone.
\nMost of the occurrences of tetrachloroethylene, l,2-(trans)-dichloroethylene, trichlorofluoromethane, 1,1,1-trichloroethane, and 2,4-D in ground water were associated with wells completed in the unconfined zone of the aquifer. Fatty acids detected in water from some wells may commonly be present naturally in ground water.
\nThe percentage of samples in which arsenic, barium, lead, and zinc were detected was similar among subareas; the samples were from the freshwater parts of the aquifer. Large lead and zinc concentrations were associated with volumes of pumpage less than 1,000 gallons.
\nIn general, the quality of ground water in the freshwater parts of the aquifer (north of the \"bad-water\" line) is suitable for all uses including human consumption. Two areas that are exceptions are: (1) Northeast of Garner Field in Uvalde, Texas, where PCE (tetrachloroethylene) has been detected in groundwater samples, and (2) north-central Bexar County near the former West Avenue landfill where PCE and benzene have been detected in ground-water samples. Concentrations of these organic compounds in water from many wells in the two areas exceed the maximum contaminant level for human consumption set by the U.S. Environmental Protection Agency.
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This report demonstrates the effects of different boundary conditions on the steady-state response of otherwise similar ground-water systems to a pumping stress. Three series of numerical experiments illustrate the behavior of three hypothetical groundwater systems that are rectangular sand prisms with the same dimensions but with different combinations of constant-head, specified-head, no-flow, and constant-flux boundary conditions. In the first series of numerical experiments, the heads and flows in all three systems are identical, as are the hydraulic conductivity and system geometry . However, when the systems are subjected to an equal stress by a pumping well in the third series, each differs significantly in its response . The highest heads (smallest drawdowns) and flows occur in the systems most constrained by constant- or specified-head boundaries. 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1987 - Sediment/water-column flux of nutrients and oxygen in the tidal Patuxent River and Estuary, Maryland","interactions":[{"subject":{"id":48933,"text":"ofr85499 - 1985 - Sediment/water-column flux of nutrients and oxygen in the tidal Patuxent River and Estuary, Maryland","indexId":"ofr85499","publicationYear":"1985","noYear":false,"title":"Sediment/water-column flux of nutrients and oxygen in the tidal Patuxent River and Estuary, Maryland"},"predicate":"SUPERSEDED_BY","object":{"id":231,"text":"wsp2296 - 1987 - Sediment/water-column flux of nutrients and oxygen in the tidal Patuxent River and Estuary, Maryland","indexId":"wsp2296","publicationYear":"1987","noYear":false,"title":"Sediment/water-column flux of nutrients and oxygen in the tidal Patuxent River and Estuary, Maryland"},"id":1}],"lastModifiedDate":"2012-02-02T00:05:12","indexId":"wsp2296","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":341,"text":"Water Supply Paper","code":"WSP","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"2296","title":"Sediment/water-column flux of nutrients and oxygen in the tidal Patuxent River and Estuary, Maryland","docAbstract":"Abstract contains content that can not be displayed, please see the publication for abstract","language":"ENGLISH","publisher":"U.S. G.P.O.,","doi":"10.3133/wsp2296","usgsCitation":"Lantrip, B.M., Summers, R.M., Phelan, D.J., and Andrle, W., 1987, Sediment/water-column flux of nutrients and oxygen in the tidal Patuxent River and Estuary, Maryland: U.S. Geological Survey Water Supply Paper 2296, v, 76 p. :ill., map ;28 cm., https://doi.org/10.3133/wsp2296.","productDescription":"v, 76 p. :ill., map ;28 cm.","costCenters":[],"links":[{"id":137493,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/wsp/2296/report-thumb.jpg"},{"id":24841,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/wsp/2296/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a0be4b07f02db5fbe25","contributors":{"authors":[{"text":"Lantrip, Bruce M.","contributorId":14795,"corporation":false,"usgs":true,"family":"Lantrip","given":"Bruce","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":142108,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Summers, Robert M.","contributorId":90285,"corporation":false,"usgs":true,"family":"Summers","given":"Robert","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":142111,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Phelan, Daniel J.","contributorId":51716,"corporation":false,"usgs":true,"family":"Phelan","given":"Daniel","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":142110,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Andrle, William","contributorId":21933,"corporation":false,"usgs":true,"family":"Andrle","given":"William","email":"","affiliations":[],"preferred":false,"id":142109,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":49381,"text":"ofr87400D - 1987 - New information resources of the U.S. Geological Survey Library System, April 1987","interactions":[],"lastModifiedDate":"2012-02-02T00:11:21","indexId":"ofr87400D","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"87-400","chapter":"D","title":"New information resources of the U.S. Geological Survey Library System, April 1987","language":"ENGLISH","doi":"10.3133/ofr87400D","usgsCitation":"Water Resources Division, U.S. Geological Survey, 1987, New information resources of the U.S. Geological Survey Library System, April 1987: U.S. Geological Survey Open-File Report 87-400, 96 p., https://doi.org/10.3133/ofr87400D.","productDescription":"96 p.","costCenters":[],"links":[{"id":178723,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1987/0400d/report-thumb.jpg"},{"id":86025,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1987/0400d/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4afee4b07f02db69772c","contributors":{"authors":[{"text":"Water Resources Division, U.S. Geological Survey","contributorId":128075,"corporation":true,"usgs":false,"organization":"Water Resources Division, U.S. Geological Survey","id":531901,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":30028,"text":"wri874172 - 1987 - Geohydrology and simulated effects of withdrawals on the Miocene aquifer system in the Mississippi Gulf Coast area","interactions":[],"lastModifiedDate":"2012-02-02T00:08:59","indexId":"wri874172","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":342,"text":"Water-Resources Investigations Report","code":"WRI","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"87-4172","title":"Geohydrology and simulated effects of withdrawals on the Miocene aquifer system in the Mississippi Gulf Coast area","docAbstract":"Intense development of the Miocene aquifer system for water supplies along the Mississippi Gulf Coast has resulted in large water level declines that have altered the groundwater flow pattern in the area. Water levels in some Miocene aquifers have declined about 2 ft/year since 1940; declines exceed 100 ft (80 ft sea level) in large areas along the coast. Water levels in the surficial aquifer system, generally less than 20 ft below land surface, have not declined. The Miocene and younger interbedded and lenticular sands and clays crop out in southern Mississippi and dip to the south and southwest. These sediments have large vertical variations in head and locally respond to stresses as separate aquifers. Freshwater recharge to the Miocene aquifer system primarily is from rainfall on the surficial aquifers. The water generally moves to the south and southeast along the bedding planes toward the Mississippi Gulf Coast where the water is either withdrawn by wells, discharges to the ocean, or gradually percolates upward into overlying aquifers. Drawdowns caused by large groundwater withdrawals along the coast probably have resulted in the gradual movement of the saltwater toward the pumping centers. In parts of the Miocene aquifer system commonly used for water supplies, the water generally is a sodium bicarbonate type. Increasing chloride concentrations in a few wells indicate that saline water is migrating into parts of all layers in the Pascagoula area. A quasi three-dimensional numerical model of the groundwater flow system was constructed and calibrated on the basis of the both pre- and post-development conditions. The effects of an expected 1.5% annual increase in groundwater withdrawals during the period 1985-2005 were evaluated by the flow model. Additional water level declines expected by the year 2005 in response to estimated pumpage are as follows: Gulfport, 135 ft in layer 4; Biloxi-Gulfport area, 100 ft in layer 5 and 50 ft in layer 3; Pascagoula area, 40 ft in layer 6 and 30 ft in layer 4. The most serious threats of saltwater encroachment occur in layers 4, 5, and 6 (the 800-, 600- and 400-ft sands) in the Pascagoula area where contamination of the southern edges of the production areas is expected to occur in less than 10 years. (Author 's abstract)","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/wri874172","usgsCitation":"Sumner, D.M., Wasson, B.E., and Kalkhoff, S., 1987, Geohydrology and simulated effects of withdrawals on the Miocene aquifer system in the Mississippi Gulf Coast area: U.S. Geological Survey Water-Resources Investigations Report 87-4172, vii, 203 p. :ill., maps ;28 cm., https://doi.org/10.3133/wri874172.","productDescription":"vii, 203 p. :ill., maps ;28 cm.","costCenters":[],"links":[{"id":124020,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/wri/1987/4172/report-thumb.jpg"},{"id":58832,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/wri/1987/4172/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ae5e4b07f02db68a519","contributors":{"authors":[{"text":"Sumner, D. M.","contributorId":100827,"corporation":false,"usgs":true,"family":"Sumner","given":"D.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":202557,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wasson, B. E.","contributorId":11204,"corporation":false,"usgs":true,"family":"Wasson","given":"B.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":202555,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kalkhoff, S. J.","contributorId":28967,"corporation":false,"usgs":true,"family":"Kalkhoff","given":"S. 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B1-B8, ill., maps (some col.) ;28 cm., https://doi.org/10.3133/b1721B.","productDescription":"v, p. B1-B8, ill., maps (some col.) ;28 cm.","costCenters":[],"links":[{"id":167810,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/bul/1721b/report-thumb.jpg"},{"id":61311,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/bul/1721b/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":61312,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/bul/1721b/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b06e4b07f02db69a266","contributors":{"authors":[{"text":"Toth, Margo I.","contributorId":18365,"corporation":false,"usgs":true,"family":"Toth","given":"Margo","email":"","middleInitial":"I.","affiliations":[],"preferred":false,"id":211038,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"King, H. D.","contributorId":89113,"corporation":false,"usgs":true,"family":"King","given":"H.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":211041,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kulik, D. M.","contributorId":46948,"corporation":false,"usgs":true,"family":"Kulik","given":"D.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":211039,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Leszcykowski, A. M.","contributorId":78735,"corporation":false,"usgs":true,"family":"Leszcykowski","given":"A. 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G.","contributorId":57843,"corporation":false,"usgs":true,"family":"Best","given":"M.","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":276257,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Morris, H. T.","contributorId":15585,"corporation":false,"usgs":true,"family":"Morris","given":"H.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":276255,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kopf, R. W.","contributorId":69544,"corporation":false,"usgs":true,"family":"Kopf","given":"R.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":276258,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Keith, J. D.","contributorId":32525,"corporation":false,"usgs":true,"family":"Keith","given":"J.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":276256,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":63111,"text":"gq1609 - 1987 - Geologic map of the Topton quadrangle, Lehigh and Berks Counties, Pennsylvania","interactions":[],"lastModifiedDate":"2012-02-10T00:10:41","indexId":"gq1609","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":316,"text":"Geologic Quadrangle","code":"GQ","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"1609","title":"Geologic map of the Topton quadrangle, Lehigh and Berks Counties, Pennsylvania","language":"ENGLISH","doi":"10.3133/gq1609","usgsCitation":"Drake, A., 1987, Geologic map of the Topton quadrangle, Lehigh and Berks Counties, Pennsylvania: U.S. Geological Survey Geologic Quadrangle 1609, 1 map :col. ;58 x 44 cm., on sheet 98 x 107 cm., folded in envelope 25 x 32 cm., https://doi.org/10.3133/gq1609.","productDescription":"1 map :col. ;58 x 44 cm., on sheet 98 x 107 cm., folded in envelope 25 x 32 cm.","costCenters":[],"links":[{"id":102684,"rank":700,"type":{"id":15,"text":"Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_1134.htm","linkFileType":{"id":5,"text":"html"},"description":"1134"},{"id":249236,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/gq/1609/report.pdf","size":"71","linkFileType":{"id":1,"text":"pdf"}},{"id":252400,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/gq/1609/report-thumb.jpg"}],"scale":"24000","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -75.75,40.5 ], [ -75.75,40.6175 ], [ -75.61749999999999,40.6175 ], [ -75.61749999999999,40.5 ], [ -75.75,40.5 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ae5e4b07f02db68a451","contributors":{"authors":[{"text":"Drake, Avery Ala","contributorId":65460,"corporation":false,"usgs":true,"family":"Drake","given":"Avery Ala","affiliations":[],"preferred":false,"id":268351,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":2519,"text":"wsp2283 - 1987 - Relation of urban land-use and dry-weather, storm, and snowmelt flow characteristics to stream-water quality, Shunganunga Creek basin, Topeka, Kansas","interactions":[{"subject":{"id":20944,"text":"ofr8475 - 1984 - Identification and tabulation of geological contacts in the Edwards aquifer, San Antonio area, Texas","indexId":"ofr8475","publicationYear":"1984","noYear":false,"title":"Identification and tabulation of geological contacts in the Edwards aquifer, San Antonio area, Texas"},"predicate":"SUPERSEDED_BY","object":{"id":2519,"text":"wsp2283 - 1987 - Relation of urban land-use and dry-weather, storm, and snowmelt flow characteristics to stream-water quality, Shunganunga Creek basin, Topeka, Kansas","indexId":"wsp2283","publicationYear":"1987","noYear":false,"title":"Relation of urban land-use and dry-weather, storm, and snowmelt flow characteristics to stream-water quality, Shunganunga Creek basin, Topeka, Kansas"},"id":1}],"lastModifiedDate":"2012-02-02T00:05:27","indexId":"wsp2283","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":341,"text":"Water Supply Paper","code":"WSP","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"2283","title":"Relation of urban land-use and dry-weather, storm, and snowmelt flow characteristics to stream-water quality, Shunganunga Creek basin, Topeka, Kansas","language":"ENGLISH","publisher":"U.S. G.P.O.,","doi":"10.3133/wsp2283","usgsCitation":"Pope, L.M., and Bevans, H.E., 1987, Relation of urban land-use and dry-weather, storm, and snowmelt flow characteristics to stream-water quality, Shunganunga Creek basin, Topeka, Kansas: U.S. Geological Survey Water Supply Paper 2283, iv, 39 p. :ill., maps ;28 cm., https://doi.org/10.3133/wsp2283.","productDescription":"iv, 39 p. :ill., maps ;28 cm.","costCenters":[],"links":[{"id":138797,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/wsp/2283/report-thumb.jpg"},{"id":28719,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/wsp/2283/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a5fe4b07f02db6349e5","contributors":{"authors":[{"text":"Pope, Larry M.","contributorId":93455,"corporation":false,"usgs":true,"family":"Pope","given":"Larry","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":145333,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bevans, Hugh E.","contributorId":11589,"corporation":false,"usgs":true,"family":"Bevans","given":"Hugh","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":145332,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":2672,"text":"wsp2294 - 1987 - Hydrologic unit maps","interactions":[{"subject":{"id":11086,"text":"ofr84708 - 1984 - State hydrologic unit maps","indexId":"ofr84708","publicationYear":"1984","noYear":false,"title":"State hydrologic unit maps"},"predicate":"SUPERSEDED_BY","object":{"id":2672,"text":"wsp2294 - 1987 - Hydrologic unit maps","indexId":"wsp2294","publicationYear":"1987","noYear":false,"title":"Hydrologic unit maps"},"id":1}],"lastModifiedDate":"2026-02-12T16:30:51.823743","indexId":"wsp2294","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":341,"text":"Water Supply Paper","code":"WSP","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"2294","title":"Hydrologic unit maps","docAbstract":"A set of maps depicting approved boundaries of, and numerical codes for, river-basin units of the United States has been developed by the U.S . Geological Survey. These 'Hydrologic Unit Maps' are four-color maps that present information on drainage, culture, hydrography, and hydrologic boundaries and codes of (1) the 21 major water-resources regions and the 222 subregions designated by the U.S . Water Resources Council, (2) the 352 accounting units of the U.S. Geological Survey's National Water Data Network, and (3) the 2,149 cataloging units of the U.S . Geological Survey's 'Catalog of information on Water Data:' The maps are plotted on the Geological Survey State base-map series at a scale of 1 :500,000 and, except for Alaska, depict hydrologic unit boundaries for all drainage basins greater than 700 square miles (1,813 square kilometers). A complete list of all the hydrologic units, along with their drainage areas, their names, and the names of the States or outlying areas in which they reside, is contained in the report.\r\n\r\nThese maps and associated codes provide a standardized base for use by water-resources organizations in locating, storing, retrieving, and exchanging hydrologic data, in indexing and inventorying hydrologic data and information, in cataloging water-data acquisition activities, and in a variety of other applications. Because the maps have undergone extensive review by all principal Federal, regional, and State water-resource agencies, they are widely accepted for use in planning and describing water-use and related land-use activities, and in geographically organizing hydrologic data . Examples of these uses are given in the report . The hydrologic unit codes shown on the maps have been approved as a Federal Information Processing Standard for use by the Federal establishment.","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/wsp2294","usgsCitation":"Seaber, P.R., Kapinos, F., and Knapp, G.L., 1987, Hydrologic unit maps: U.S. Geological Survey Water Supply Paper 2294, iii, 63 p. :ill. (some col.), maps (some col.) ;28 cm.; 1 plate in pocket, https://doi.org/10.3133/wsp2294.","productDescription":"iii, 63 p. :ill. (some col.), maps (some col.) ;28 cm.; 1 plate in pocket","costCenters":[],"links":[{"id":138259,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":35,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/wsp/wsp2294/index.html","linkFileType":{"id":5,"text":"html"}},{"id":258460,"rank":3,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/wsp/2294/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4814e4b07f02db4dab42","contributors":{"authors":[{"text":"Seaber, Paul R.","contributorId":67492,"corporation":false,"usgs":true,"family":"Seaber","given":"Paul","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":145590,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kapinos, F. Paul","contributorId":42581,"corporation":false,"usgs":true,"family":"Kapinos","given":"F. Paul","affiliations":[],"preferred":false,"id":145589,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Knapp, George L.","contributorId":93466,"corporation":false,"usgs":true,"family":"Knapp","given":"George","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":145591,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":16015,"text":"ofr87485 - 1987 - Field trip guidebook to selected metallic mineral deposits in the Glens Falls 1° x 2° quadrangle, New York, Vermont, and New Hampshire","interactions":[],"lastModifiedDate":"2021-09-03T19:14:18.642675","indexId":"ofr87485","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"87-485","title":"Field trip guidebook to selected metallic mineral deposits in the Glens Falls 1° x 2° quadrangle, New York, Vermont, and New Hampshire","docAbstract":"No abstract available.
","language":"English","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr87485","usgsCitation":"Slack, J.F., Robinson, G., and McLelland, J.M., 1987, Field trip guidebook to selected metallic mineral deposits in the Glens Falls 1° x 2° quadrangle, New York, Vermont, and New Hampshire: U.S. Geological Survey Open-File Report 87-485, 37 p., https://doi.org/10.3133/ofr87485.","productDescription":"37 p.","costCenters":[],"links":[{"id":388848,"rank":2,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_17276.htm"},{"id":44957,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1987/0485/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":147920,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1987/0485/report-thumb.jpg"}],"country":"United States","state":"New Hampshire, New York, Vermont","otherGeospatial":"Glens Falls 1° x 2° quadrangle","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -74,\n 43\n ],\n [\n -72,\n 43\n ],\n [\n -72,\n 44\n ],\n [\n -74,\n 44\n ],\n [\n -74,\n 43\n ]\n ]\n ]\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49fce4b07f02db5f5573","contributors":{"authors":[{"text":"Slack, J. F.","contributorId":75917,"corporation":false,"usgs":true,"family":"Slack","given":"J.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":172095,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Robinson, G.R. Jr. 0000-0002-9676-9564","orcid":"https://orcid.org/0000-0002-9676-9564","contributorId":6444,"corporation":false,"usgs":true,"family":"Robinson","given":"G.R.","suffix":"Jr.","affiliations":[],"preferred":false,"id":172094,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McLelland, J. M.","contributorId":85604,"corporation":false,"usgs":true,"family":"McLelland","given":"J.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":172096,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":15304,"text":"ofr87171 - 1987 - A simple ternary/quaternary plotting program for microcomputers","interactions":[],"lastModifiedDate":"2012-02-02T00:06:47","indexId":"ofr87171","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"87-171","title":"A simple ternary/quaternary plotting program for microcomputers","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr87171","usgsCitation":"O’Connor, J.T., 1987, A simple ternary/quaternary plotting program for microcomputers: U.S. Geological Survey Open-File Report 87-171, 33 p. :ill. ;28 cm., https://doi.org/10.3133/ofr87171.","productDescription":"33 p. :ill. ;28 cm.","costCenters":[],"links":[{"id":146392,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1987/0171/report-thumb.jpg"},{"id":44227,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1987/0171/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b17e4b07f02db6a64ef","contributors":{"authors":[{"text":"O’Connor, J. T.","contributorId":92266,"corporation":false,"usgs":true,"family":"O’Connor","given":"J.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":170924,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":2265,"text":"wsp2303 - 1987 - Analysis of surface-water data network in Kansas for effectiveness in providing regional streamflow information; with a section on theory and application of generalized least squares","interactions":[{"subject":{"id":14939,"text":"ofr85680 - 1985 - Analysis of surface-water data network in Kansas for effectiveness in providing regional streamflow information","indexId":"ofr85680","publicationYear":"1985","noYear":false,"title":"Analysis of surface-water data network in Kansas for effectiveness in providing regional streamflow information"},"predicate":"SUPERSEDED_BY","object":{"id":2265,"text":"wsp2303 - 1987 - Analysis of surface-water data network in Kansas for effectiveness in providing regional streamflow information; with a section on theory and application of generalized least squares","indexId":"wsp2303","publicationYear":"1987","noYear":false,"title":"Analysis of surface-water data network in Kansas for effectiveness in providing regional streamflow information; with a section on theory and application of generalized least squares"},"id":1}],"lastModifiedDate":"2012-02-02T00:05:20","indexId":"wsp2303","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":341,"text":"Water Supply Paper","code":"WSP","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"2303","title":"Analysis of surface-water data network in Kansas for effectiveness in providing regional streamflow information; with a section on theory and application of generalized least squares","docAbstract":"This report documents the results of an analysis of the surface-water data network in Kansas for its effectiveness in providing regional streamflow information. The network was analyzed using generalized least squares regression. The correlation and time-sampling error of the streamflow characteristic are considered in the generalized least squares method. Unregulated medium-, low-, and high-flow characteristics were selected to be representative of the regional information that can be obtained from streamflow-gaging-station records for use in evaluating the effectiveness of continuing the present network stations, discontinuing some stations, and (or) adding new stations. The analysis used streamflow records for all currently operated stations that were not affected by regulation and for discontinued stations for which unregulated flow characteristics, as well as physical and climatic characteristics, were available. The State was divided into three network areas, western, northeastern, and southeastern Kansas, and analysis was made for the three streamflow characteristics in each area, using three planning horizons. \r\n\r\nThe analysis showed that the maximum reduction of sampling mean-square error for each cost level could be obtained by adding new stations and discontinuing some current network stations. Large reductions in sampling mean-square error for low-flow information could be achieved in all three network areas, the reduction in western Kansas being the most dramatic. The addition of new stations would be most beneficial for mean-flow information in western Kansas. The reduction of sampling mean-square error for high-flow information would benefit most from the addition of new stations in western Kansas. Southeastern Kansas showed the smallest error reduction in high-flow information. A comparison among all three network areas indicated that funding resources could be most effectively used by discontinuing more stations in northeastern and southeastern Kansas and establishing more new stations in western Kansas.","language":"ENGLISH","publisher":"U.S. G.P.O.,","doi":"10.3133/wsp2303","usgsCitation":"Medina, K., and Tasker, G.D., 1987, Analysis of surface-water data network in Kansas for effectiveness in providing regional streamflow information; with a section on theory and application of generalized least squares: U.S. Geological Survey Water Supply Paper 2303, iv, 28 p. :ill., map ;28 cm., https://doi.org/10.3133/wsp2303.","productDescription":"iv, 28 p. :ill., map ;28 cm.","costCenters":[],"links":[{"id":137588,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/wsp/2303/report-thumb.jpg"},{"id":28055,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/wsp/2303/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4acfe4b07f02db68015f","contributors":{"authors":[{"text":"Medina, K.D.","contributorId":46925,"corporation":false,"usgs":true,"family":"Medina","given":"K.D.","email":"","affiliations":[],"preferred":false,"id":144919,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tasker, Gary D.","contributorId":95035,"corporation":false,"usgs":true,"family":"Tasker","given":"Gary","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":144920,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":60983,"text":"mf1081 - 1987 - Seismicity map of the state of Louisiana","interactions":[],"lastModifiedDate":"2017-05-11T13:58:06","indexId":"mf1081","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":325,"text":"Miscellaneous Field Studies Map","code":"MF","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"1081","title":"Seismicity map of the state of Louisiana","docAbstract":"This map is one of a series of seismicity maps produced by the U.S. Geological Survey that show earthquake data of individual states or groups of states at the scale of 1:1,000,000. This map shows only those earthquakes with epicenters located within the boundaries of Louisiana, even though earthquakes in nearby states may have been felt or may have caused damage in Louisiana.
The data in table 1 were used to compile the seismicity map; these data are a corrected, expanded, and updated (through 1987) version of the data used by Algermissen (1969) for a study of seismic risk in the United States. The locations and intensities of some earthquakes were revised and intensities were assigned where none had been before. Many earthquakes were added to the original list from new data sources as well as from some old data sources that has not been previously used. The data in table 1 represent best estimates of the location of the epicenter, magnitude, and intensity of each earthquake on the basis of historical and current information. Some of the aftershocks from large earthquakes are listed, but not all, especially for earthquakes that occurred before seismic instruments were universally used.