{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Joshua F. Valder", "hasEmail": "mailto:jvalder@usgs.gov"}, "description": "A previously developed three-dimensional groundwater flow model \n(https://doi.org/10.3133/sir20125183) of the three primary aquifers\nin the region north of Aberdeen, South Dakota, was revised to \nassist the City of Aberdeen with water-resource planning.  The \nprincipal aquifers are the Elm, Middle James, and Deep James. \nThe numerical model is intended to be used to (1) simulate \nhydrologic scenarios of interest to groundwater managers and to \nadvance the understanding of groundwater budgets and components \nincluding recharge, discharge, and aquifer storage, (2) compute \nhistorical and projected system response to natural and anthropogenic \nstresses, and (3) evaluate potential withdrawal scenarios to assist \nwith water-management decisions.\nThe three-dimensional groundwater-flow model was developed using \nthe USGS's numerical modeling software, MODFLOW-NWT. The \nmodel included both steady-state (mean) and transient (temporally \nvarying) conditions. Steady-state data were from October 1, 1974 to \nSeptember 30, 2009, and the transient time period included data from \nOctober 1, 1974 to September 30, 2015. The model was calibrated by \nattempting to match simulated and measured or estimated hydraulic \nheads, differences in hydraulic heads between aquifers, and stream \nbase flow. Water budgets for the model's layers area were produced \nwith ZONEBUDGET.\nThis USGS data release contains all of the input and output files for \nthe model described in the associated model documentation report \n(http://doi.org/10.3133/sir20185137). The data release also includes \n(1) MODFLOW-NWT (version 1.1.4) source code, and (2) ZONEBUDGET \n(3.01) source code.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9JVNFLY", "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.e6e47c90-c5c4-4363-bfb4-a8c492107360.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_e6e47c90-c5c4-4363-bfb4-a8c492107360", "keyword": ["Aberdeen", "Deep James aquifer", "Elm aquifer", "Groundwater", "Groundwater Model", "Inlandwaters", "MODFLOW-NWT", "Middle James aquifer", "South Dakota", "USGS:e6e47c90-c5c4-4363-bfb4-a8c492107360", "environment", "geoscientificInformation", "inlandWaters", "usgsgroundwatermodel"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-98.599033, 45.473605, -98.276695, 45.677093", "theme": ["geospatial"], "title": "MODFLOW-NWT model of the glacial aquifer system north of Aberdeen, South Dakota, through water year 2015"}