Digital data sets that describe aquifer characteristics of the alluvial and terrace deposits along the Beaver-North Canadian River from the panhandle to Canton Lake in northwestern Oklahoma

This data set consists of digital aquifer boundaries for the
alluvial and terrace deposits along the Beaver-North Canadian
River from the panhandle to Canton Lake in northwestern
Oklahoma. Ground water in 830 square miles of the Quaternary-age
alluvial and terrace aquifer is an important source of water for
irrigation, industrial, municipal, stock, and domestic supplies.
The aquifer consists of poorly sorted, fine to coarse,
unconsolidated quartz sand with minor amounts of clay, silt, and
basal gravel. The hydraulically connected alluvial and terrace
deposits unconformably overlie the Tertiary-age Ogallala
Formation and Permian-age formations.

The aquifer boundaries established in a ground-water flow model
for the aquifer include areas: 1) where the terrace deposits
pinch out against relatively impermeable Permian-age formations;
2) where the alluvium has been deposited against relatively
impermeable Permian-age formations; 3) where the alluvial and
terrace deposits have been eroded and underlying Permian-age
formations are exposed at the surface; 4) where the aquifer
extends beyond the geographic limit of the study area; and 5)
where the aquifer has little or no saturated thickness.

The lines in the data set representing aquifer boundaries
along geological contacts were extracted from a published
digital surficial geology data set based on a scale of
1:250,000. The geographic limits of the aquifer and areas of
little or no saturated thickness were digitized from a folded
paper map, at a scale of 1:250,000 from a ground-water
modeling report.