{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Carol J. Becker", "hasEmail": "mailto:cjbecker@usgs.gov"}, "description": "This data set consists of digitized polygons of constant\nhydraulic conductivity values for the Elk City aquifer in\nwestern Oklahoma. The aquifer covers an area of approximately\n193,000 acres and supplies ground water for irrigation,\ndomestic, and industrial purposes in Beckham, Custer, Roger\nMills, and Washita Counties along the divide between the Washita\nand Red River basins.\nThe Elk City aquifer consists of the Elk City Sandstone and\noverlying terrace deposits, made up of clay, silt, sand and\ngravel, and dune sands in the eastern part and sand and gravel\nof the Ogallala Formation (or High Plains aquifer) in the\nwestern part of the aquifer. The Elk City aquifer is unconfined\nand composed of very friable sandstone, lightly cemented with\nclay, calcite, gypsum, or iron oxide. Most of the grains are\nfine-sized quartz but the grain size ranges from clay to cobble\nin the aquifer. The Doxey Shale underlies the Elk City aquifer\nand acts as a confining unit, restricting the downward movement\nof ground water.\nValues of hydraulic conductivity used as input to the\nground-water flow model and in this data set are: 50 gallons per\nday per foot squared or 6.7 feet per day for the Elk City\nSandstone; 500 gallons per day per foot squared or 66.8 feet per\nday for the Quaternary terrace deposits and dune sand; and 750\ngallons per day per foot squared or 100.3 feet day for the\nOgallala Formation.\nThe hydraulic conductivity polygons from a ground-water modeling\nthesis were transferred to a photocopy of a paper map and\ndigitized. The source map was published at a scale of 1:63,360.\nGround-water flow models are numerical representations that\nsimplify and aggregate natural systems. Models are not unique;\ndifferent combinations of aquifer characteristics may produce\nsimilar results. Therefore, values of hydraulic conductivity\nused in the model and presented in this data set are not\nprecise, but are within a reasonable range when compared to\nindependently collected data.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9P4S0J8", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.588db009-f363-4165-81d7-2c780889b737.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_588db009-f363-4165-81d7-2c780889b737", "keyword": ["Elk City Sandstone", "Elk City Sandstone aquifer", "Elk City aquifer", "USGS:588db009-f363-4165-81d7-2c780889b737", "aquifers", "coefficent of permeability", "environment", "geoscientificInformation", "ground water", "ground-water vulnerability", "groundwater", "groundwater vulnerability", "hydraulic conductivity", "inlandWaters", "permeability", "permeability coefficent"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-99.6799, 35.2192, -99.0740, 35.5458", "theme": ["geospatial"], "title": "Digital data sets that describe aquifer characteristics of the Elk City aquifer in western Oklahoma"}