{"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 \nsurveys for areas of the North and South Platte River valleys and Lodgepole Creek in western \nNebraska. The objective of the surveys was to map the aquifers and bedrock topography of \nselected areas to help improve the understanding of groundwater-surface-water relationships \nto be used in water management decisions. Frequency-domain (2008 and 2009) and time-domain \n(2010) helicopter electromagnetic surveys were completed, using a unique survey flight line design, \nto collect resistivity data that can be related to lithologic information for refinement of groundwater \nmodel inputs.  To make the geophysical data useful for multidimensional groundwater models, \nnumerical inversion is necessary to convert the measured data into a depth-dependent subsurface \nresistivity model.  This inversion model, in conjunction with sensitivity analysis, geological ground \ntruth (boreholes), and geological interpretation, is used to characterize hydrogeologic features.  \nThe two- and three- dimensional interpretation provides the groundwater modeler with a high-resolution \nhydrogeologic framework and a quantitative estimate of framework uncertainty.  This method of \ncreating hydrogeologic frameworks improved the understanding of the actual flow path orientation \nby redefining the location of the paleochannels and associated bedrock highs. The improved models \nrepresent the hydrogeology at a level of accuracy not achievable using previous data sets.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9480G2L", "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.5e8d89de-786d-4d58-9b39-d7ecef8a24ff.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_5e8d89de-786d-4d58-9b39-d7ecef8a24ff", "keyword": ["Nebraska", "Ogallala", "Scottsbluff", "Sidney", "USGS:5e8d89de-786d-4d58-9b39-d7ecef8a24ff", "environment", "geoscientificInformation", "imageryBaseMapsEarthCover", "inlandWaters"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-104.2, 41.0, -102.05, 41.44", "theme": ["geospatial"], "title": "Base Control Points enhanced with airborne electromagnetic (AEM) surveys of the principal aquifer for portions of the North Platte, South Platte, and Twin Platte Natural Resources Districts, western Nebraska"}