{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Colorado Water Science Center", "hasEmail": "mailto:lrarnold@usgs.gov"}, "description": "This raster data set delineates the predicted probability of unmixed young groundwater \n(defined using chlorofluorocarbon-11 concentrations and tritium activities) in groundwater \nin the Eagle River watershed valley-fill aquifer, Eagle County, North-Central Colorado, \n2006-2007. This data set was developed by a cooperative project between the U.S. \nGeological Survey, Eagle County, the Eagle River Water and Sanitation District, the \nTown of Eagle, the Town of Gypsum, and the Upper Eagle Regional Water Authority. \nThis project was designed to evaluate potential land-development effects on groundwater \nand surface-water resources so that informed land-use and water management decisions \ncan be made. This groundwater probability map and its associated probability maps \nwere developed as follows: (1) A point data set of wells with groundwater quality and \ngroundwater age data was overlaid with thematic layers of anthropogenic (related to \nhuman activities) and hydrogeologic data by using a geographic information system \nto assign each well values for depth to groundwater, distance to major streams and \ncanals, distance to gypsum beds, precipitation, soils, and well depth. These data \nthen were downloaded to a statistical software package for analysis by logistic \nregression. (2) Statistical models predicting the probability of elevated nitrate \nconcentrations, the probability of unmixed young water (using chlorofluorocarbon-11 \nconcentrations and tritium activities), and the probability of elevated volatile organic \ncompound concentrations were developed using logistic regression techniques. \n(3) The statistical models were entered into a GIS and the probability map was \nconstructed.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9XUVC43", "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.aa754a49-87dd-48e0-95ae-254ef6637434.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_aa754a49-87dd-48e0-95ae-254ef6637434", "keyword": ["Brush Creek", "CFC", "Colorado", "Dotsero, CO", "Eagle County, CO", "Eagle River", "Eagle River Watershed", "Eagle, CO", "Edwards, CO", "Gypsum Creek", "Gypsum, CO", "Minturn, CO", "USGS:aa754a49-87dd-48e0-95ae-254ef6637434", "VOC", "Vail, CO", "Wolcott, CO", "chlorofluorocarbon", "contamination", "ground water", "groundwater", "groundwater age", "inlandWaters", "logistic regression", "nitrate", "probability", "probability of groundwater contamination", "susceptibility", "volatile organic compound", "vulnerability"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-107.115478, 39.545350, -106.275619, 39.717430", "theme": ["geospatial"], "title": "Probability of Unmixed Young Groundwater (defined using chlorofluorocarbon-11 concentrations and tritium activities) in the Eagle River Watershed Valley-Fill Aquifer, Eagle County, North-Central Colorado, 2006-2007"}