{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Chris Hobza", "hasEmail": "mailto:cmhobza@usgs.gov"}, "description": "The U.S. Geological Survey and its partners have collaborated to complete airborne geophysical surveys \nfor areas of the North and South Platte River valleys and Lodgepole Creek in western Nebraska. The \nobjective of the surveys was to map the aquifers and bedrock topography of selected areas to help \nimprove the understanding of groundwater-surface-water relationships to be used in water management \ndecisions. Frequency-domain (2008 and 2009) and time-domain (2010) helicopter electromagnetic \nsurveys were completed, using a unique survey flight line design, to collect resistivity data that can \nbe related to lithologic information for refinement of groundwater model inputs.  To make the geophysical \ndata useful for multidimensional groundwater models, numerical inversion is necessary to convert the \nmeasured data into a depth-dependent subsurface resistivity model.  This inversion model, in conjunction\n with sensitivity analysis, geological ground truth (boreholes), and geological interpretation, is used to \ncharacterize hydrogeologic features.  The two- and three- dimensional interpretation provides the \ngroundwater modeler with a high-resolution hydrogeologic framework and a quantitative estimate of \nframework uncertainty.  This method of creating hydrogeologic frameworks improved the understanding \nof the actual flow path orientation by redefining the location of the paleochannels and associated bedrock \nhighs. The improved models represent the hydrogeology at a level of accuracy not achievable using \nprevious data sets.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9MIC9HU", "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.0ede1aeb-cee7-4b27-b5e1-979b1989650d.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_0ede1aeb-cee7-4b27-b5e1-979b1989650d", "keyword": ["Nebraska", "Ogallala", "Scottsbluff", "Sidney", "USGS:0ede1aeb-cee7-4b27-b5e1-979b1989650d", "environment", "geoscientificInformation", "inlandWaters", "principal aquifer boundary"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-104.2, 41.0, -102.5, 41.44", "theme": ["geospatial"], "title": "Base of principal aquifer boundary for portions of the North Platte, South Platte, and Twin Platte Natural Resources Districts, western Nebraska"}