MODFLOW-NWT model used in simulation of groundwater availability in the Salt Fork Red River aquifer, southwestern Oklahoma, 1980-2015
The U.S. Geological Survey, in cooperation with the Oklahoma Water Resources Board, 
constructed a finite-difference numerical groundwater-flow model of the Salt Fork Red 
River aquifer using MODFLOW with the Newton formulation solver (MODFLOW-NWT). 
The 1973 Oklahoma Water Law requires the Oklahoma Water Resources …