Digital map of the elevation of the base of the High Plains Aquifer in the Republican River Basin upstream of Hardy, Nebraska, in parts of Nebraska, Kansas, and Colorado

This digital spatial data set consists of the aquifer base elevation contours
(50-foot contour interval) for part of the High Plains aquifer in the central
United States. This subset of the High Plains aquifer covers the Republican
River Basin in Nebraska, Kansas, and Colorado upstream from the streamflow
station on the Republican River near Hardy, Nebraska, near the Kansas/Nebraska
border. In Nebraska, the digitized contours extend to the South Platte, Platte,
and Little Blue Rivers. In Colorado and Kansas, the digital contours extend to
the edge of the High Plains aquifer. These boundaries were chosen to simplify
boundary conditions for a computer simulation model being used for a hydrologic
study of the Republican River Basin.