{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Carol J. Becker", "hasEmail": "mailto:cjbecker@usgs.gov"}, "description": "This data set consists of digital polygons of constant hydraulic\nconductivity values for the High Plains aquifer in Oklahoma.\nThis area encompasses the panhandle counties of Cimarron, Texas,\nand Beaver, and the western counties of Harper, Ellis, Woodward,\nDewey, and Roger Mills. The High Plains aquifer underlies\napproximately 7,000 square miles of Oklahoma and is used\nextensively for irrigation. The High Plains aquifer is a\nwater-table aquifer and consists predominately of the\nTertiary-age Ogallala Formation and overlying Quaternary-age\nalluvial and terrace deposits. In some areas the aquifer is\nabsent and the underlying Triassic, Jurassic, or Cretaceous-age\nrocks are exposed at the surface. These rocks are hydraulically\nconnected with the aquifer in some areas.\nThe High Plains aquifer is composed of interbedded sand,\nsiltstone, clay, gravel, thin limestones, and caliche. The\nproportion of various lithological materials changes rapidly\nfrom place to place, but poorly sorted sand and gravel\npredominate. The rocks are poorly to moderately well cemented by\ncalcium carbonate.\nThe High Plains aquifer was divided into three zones with each\nzone having an assigned hydraulic conductivity that was used as\ninput to a ground-water flow model on the High Plains aquifer.\nThese values are 8.3 feet per day for the west zone, 16.2 feet\nper day for the central zone, and 19.3 feet per day for the east\nzone.\nThe polygon boundaries and constant hydraulic conductivity\nvalues were constructed by extracting lines from digital\nsurficial geology data sets based on a scale of 1:125,000 for\nthe panhandle counties and 1:250,000 for the western counties.\nSome of the lines were digitized from maps in a published\nwater-level elevation map for 1980.\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/P9CAY91X", "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.08fb4a5c-e233-4c99-8822-c358b784cb64.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_08fb4a5c-e233-4c99-8822-c358b784cb64", "keyword": ["High Plains aquifer", "Ogallala Formation", "Ogallala aquifer", "USGS:08fb4a5c-e233-4c99-8822-c358b784cb64", "aquifers", "environment", "geoscientificInformation", "ground water", "ground-water vulnerability", "groundwater", "groundwater vulnerability", "hydraulic conductivity", "inlandWaters", "northwestern Oklahoma", "panhandle of Oklahoma", "western Oklahoma", "western counties in Oklahoma"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-102.8856, 35.2500, -99.2367, 37.1297", "theme": ["geospatial"], "title": "Digital data sets that describe aquifer characteristics of the High Plains aquifer in western Oklahoma"}