{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Kyle W. Davis", "hasEmail": "mailto:kyledavis@usgs.gov"}, "description": "A three-dimensional groundwater flow model was developed to characterize groundwater resources \nthe uppermost principal aquifers in the Williston structural basin in parts of Montana, North Dakota, and \nSouth Dakota in the United States and of Manitoba and Saskatchewan in Canada as part of a detailed \nassessment of the groundwater availability of the area. The uppermost principal aquifers are comprised of \nthe glacial, lower Tertiary, and Upper Cretaceous aquifer systems. The model was developed as a part of \nthe U.S. Geological Survey Water Availability and Use Science Program's effort to conduct large-scale \nmultidisciplinary regional studies of groundwater availability. The numerical model is intended to be used to \n(1) simulate hydrologic scenarios of interest to groundwater managers and to advance the understanding of \ngroundwater budgets and components including recharge, discharge, and aquifer storage for the entire system, \n(2) compute historical and projected system response to natural and anthropogenic stresses, and \n(3) evaluate potential hydrologic monitoring programs at a scale relevant to basin-wide water-management decisions.\nThe three-dimensional groundwater-flow model was developed using the numerical modeling software, \nMODFLOW-NWT. The steady-state (mean) hydrological conditions included data from 1981 to 2005, and \ntransient (temporally-varying) conditions included a combination of a steady state period with data prior to \n1960, and a transient period from 1961 to 2005. The model was calibrated by attempting to match simulated \nand measured or estimated hydraulic heads, differences in hydraulic heads between aquifers, stream base \nflow, and measured flow at flowing artesian wells. Sub-regional water budgets for the model area were produced \nwith ZONEBUDGET.\n\t\t\t\nThis USGS data release contains all of the input and output files for the model described in the \nassociated model documentation report (https://doi.org/10.3133/sir201755158). This data release also \nincludes (1) MODFLOW-NWT (version 1.0.9) source code, and (2) ZONEBUDGET source code.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/F75B01CZ", "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.50221198-95fb-4d21-b1e1-da0fba95df06.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_50221198-95fb-4d21-b1e1-da0fba95df06", "keyword": ["Fort Union aquifer", "Fox Hills aquifer", "Groundwater", "Groundwater Model", "Hell Creek aquifer", "InlandWaters", "MODFLOW-NWT", "Manitoba", "Montana", "North Dakota", "Northern Great Plains", "Saskatchewan", "South Dakota", "USGS:50221198-95fb-4d21-b1e1-da0fba95df06", "environment", "geoscientificInformation", "inlandWaters", "usgsgroundwatermodel"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-108.801363, 44.308885, -98.345982, 50.928058", "theme": ["geospatial"], "title": "MODFLOW-NWT model used to assess groundwater availability in the uppermost principal aquifer systems of the Williston structural basin, United States and Canada"}