MODFLOW-NWT model used to evaluate groundwater-withdrawal scenarios for the North Fork Red River aquifer upgradient from Lake Altus, western Oklahoma, 1980-2022, including streamflow, base-flow, and precipitation statistics

The U.S. Geological Survey, in cooperation with the Bureau of Reclamation, used five scenarios created from a previously published numerical groundwater-flow model (1980–2013) and historical streamflow records (1980–2022) to investigate the relation between groundwater withdrawals from the North Fork Red River aquifer and inflows to Lake Altus from the North Fork Red River in western Oklahoma. The five scenarios were (1) a scaled-EPS groundwater-withdrawal scenario, (2) a scaled-reported groundwater-withdrawal scenario, (3) a zonal-scaled-reported groundwater-withdrawal scenario, (4) a historical drought-threshold scenario, and (5) a base-flow and evapotranspiration depletion scenario. This USGS data release contains all input and output files for the groundwater-flow simulations and streamflow and base-flow statistics described in the associated model documentation report (https://doi.org/10.3133/SIR20265047). Supporting geospatial data are provided that were used to display model outputs.