{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "S. Jerrod Smith", "hasEmail": "mailto:sjsmith@usgs.gov"}, "description": "In 2017 the U.S. Geological Survey, in cooperation with the Oklahoma Water Resources Board, published a \ncalibrated numerical groundwater-flow model and associated model documentation report that evaluated the effects \nof potential groundwater withdrawals on groundwater flow and availability in the North Fork Red River aquifer in \nsouthwest Oklahoma. The results of groundwater-availability scenarios run on the calibrated numerical \ngroundwater-flow model could be used by the Oklahoma Water Resources Board to reevaluate the maximum \nannual yield of groundwater from the North Fork Red River aquifer in Oklahoma. The numerical groundwater-flow \nmodel was built on a hydrogeologic framework and a conceptual groundwater-flow model derived from previously \npublished and newly collected hydrologic data. A hydrogeologic framework is a three-dimensional representation \nof the aquifer and the surrounding geologic units at a scale that captures the regional controls on groundwater flow. \nThe hydrogeologic framework for the North Fork Red River aquifer included a definition of the aquifer extent and \npotentiometric surface, as well as a description of the textural and hydraulic properties of aquifer materials. A \nconceptual groundwater-flow model is a simplified description of the major inflow and outflow sources (hydrologic \nboundaries) of a groundwater-flow system as well as an accounting of the estimated mean flows from those sources \n(water budget) for a specified period of time. The hydrogeologic framework and conceptual model are necessary \nconstraints used in the construction and calibration of a scientifically defensible numerical groundwater-flow model \nthat reasonably represents the groundwater-flow system. \n\t\t\n\t  A finite-difference numerical groundwater-flow model of the North Fork Red River aquifer was constructed by \nusing MODFLOW-2005 with the Newton formulation solver (MODFLOW-NWT). Data inputs for each package were \nspecified in machine-readable text files. The numerical model of the North Fork Red River aquifer had 385 rows, 460 \ncolumns, about 27,600 active cells of 886 by 886 ft (270 by 270 meters), and 2 convertible layers. The top layer \n(layer 1) represented the undifferentiated Quaternary alluvium and terrace deposits with variable thickness determined \nfrom the hydrogeologic framework, and the bottom layer (layer 2) represented the Permian bedrock with a nominal \nthickness of about 100 feet. The model active area was created from the North Fork Red River aquifer extent and \nexpanded in some areas to ensure that each active cell was in connection with at least one other active cell. One \nterrace lobe in northern Beckham County was not included in the model active area because it was almost separated \nspatially and hydraulically from the rest of the North Fork Red River aquifer. The numerical model was temporally \ndiscretized into 408 monthly transient stress periods (each with 2 time steps) representing the period 1980\u20132013. An \ninitial steady-state stress period, in which the groundwater-flow equation had no storage component, represented \nmean annual inflows to and outflows from the aquifer and produced a solution that was used as the initial condition \nfor subsequent transient stress periods. The numerical model was constructed in units of meters and days. This \nUSGS data release contains all of the input and output files for the simulations described in the associated model \ndocumentation report (https://doi.org/10.3133/sir20175098).", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/F7JQ0ZXH", "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.d34e3086-129b-42fd-8615-8baa79a9e41d.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_d34e3086-129b-42fd-8615-8baa79a9e41d", "keyword": ["Beckham County", "Greer County", "Groundwater", "Groundwater Model", "Groundwater and surface-water interaction", "Jackson County", "Kiowa County", "Lake Altus", "MODFLOW-NWT", "North Fork Red River", "Oklahoma", "PEST", "Roger Mills County", "Soil Water Balance", "Tom Steed Reservoir", "USGS:d34e3086-129b-42fd-8615-8baa79a9e41d", "environment", "geoscientificInformation", "inlandWaters", "usgsgroundwatermodel"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-100.24085, 34.56934, -98.87130, 35.51279", "theme": ["geospatial"], "title": "MODFLOW-NWT model used in simulation of groundwater flow and availability in the North Fork Red River aquifer, southwest Oklahoma, 1980-2013"}