Analyzing and modeling the groundwater system of the principal alluvial aquifers in the upper Red River basin, in particular the connection between groundwater and surface water, and estimating effects of water use or drought on groundwater resources, the effects on groundwater flow to and from streams, and how this affects available surface water and ecological flow in the upper Red River Basin. This will be done by constructing and calibrating one or more numerical groundwater models for alluvial aquifers that are hydraulically connected to major streams in the upper Red River Basin.
The study area is defined as the Red River Basin upstream from Lake Texoma, which impounds streamflow from the Red River where it forms the border between Oklahoma and Texas westward into the Texas panhandle and western Oklahoma. Principal aquifers are defined as those that are directly connected to the streams and depending on the season or location provide base flow to the stream or receive infiltration of streamflow. Alluvial aquifers were chosen because they are the primary source for base flow to streams in the upper Red River Basin, and they are affected by precipitation that provides recharge.
The hydrogeological characteristics these aquifers influence streamflow by providing base flow during dry periods, and water withdrawal from the aquifers can potentially cause streamflow depletion.
The groundwater model and results that are compiled during the study will archived according to USGS policy. The methods used during the study and a summary of results will be documented in a USGS Scientific Investigations Report.