Specific yield, High Plains aquifer

This raster data set represents specific-yield ranges in the High Plains aquifer of the United States.
The High Plains aquifer underlies 112.6 million acres (176,000 square miles) in parts of eight States:
Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming.
Specific yield ranges from near zero to 30 percent (Gutentag and others, 1984). This data set
was generated in ESRI ArcInfo Workstation Version 9.3, which is a geographic information
system (GIS), from a contour map of specific-yield ranges.
REFERENCES CITED --
Gutentag, E.D., Heimes, F.J., Krothe, N.C., Luckey, R.R., and Weeks, J.B., 1984,
Geohydrology of the High Plains aquifer in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming:
U.S. Geological Survey Professional Paper 1400-B, 63 p.