Digital data sets that describe aquifer characteristics of the alluvial and terrace deposits along the North Canadian River from Canton Lake to Lake Overholser in central Oklahoma

This data set consists of digital polygons of a constant
recharge value for the alluvial and terrace deposits along the
North Canadian River from Canton Lake to Lake Overholser in
central Oklahoma. Ground water in approximately 400 square miles
of Quaternary-age alluvial and terrace aquifer is an important
source of water for irrigation, industrial, municipal, stock,
and domestic supplies. The aquifer consists of clay, silt,
sand, and gravel. Sand-sized sediments dominate the poorly
sorted, fine to coarse, unconsolidated quartz grains in the
aquifer. The hydraulically connected alluvial and terrace
deposits unconformably overlie Permian-age formations. The
aquifer is overlain by a layer of wind-blown sand in parts of
the area.

A uniform recharge rate of 1 inch per year was used as input to
the ground-water flow model for the aquifer and is used in this
data set.

The features representing boundaries along geological contacts
were extracted from published digital surficial geology data
sets based on a scale of 1:250,000. The northwest and southeast
geographic limits of the aquifer and were digitized from a
folded paper map in a ground-water modeling report, at a scale
of 1:250,000

Ground-water flow models are numerical representations that
simplify and aggregate natural systems. Models are not unique;
different combinations of aquifer characteristics may produce
similar results. Therefore, values of recharge used in the
model and presented in this data set are not precise, but are
within a reasonable range when compared to independently
collected data.