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Digital data sets that describe aquifer characteristics of the Elk City aquifer in western Oklahoma

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Release Date
15 March 2013
Modified Date
17 November 2014
Update Frequency
notPlanned
Publishers
U.S. Geological Survey, Department of the Interior
Identifier
digital-data-sets-that-describe-aquifer-characteristics-of-the-elk-city-aquifer-in-western-okla876b6
Landing Page
http://catalog.data.gov/dataset/digital-data-sets-that-describe-aquifer-characteristics-of-the-elk-city-aquifer-in-western-okla876b6

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Description

This data set consists of digitized polygons of constant recharge values for the Elk City aquifer in western Oklahoma. The aquifer covers an area of approximately 193,000 acres and supplies ground water for irrigation, domestic, and industrial purposes in Beckham, Custer, Roger Mills, and Washita Counties along the divide between the Washita and Red River basins. The Elk City aquifer consists of the Elk City Sandstone and overlying terrace deposits, made up of clay, silt, sand and gravel, and dune sands in the eastern part and sand and gravel of the Ogallala Formation (or High Plains aquifer) in the western part of the aquifer. The Elk City aquifer is unconfined and composed of very friable sandstone, lightly cemented with clay, calcite, gypsum, or iron oxide. Most of the grains are fine-sized quartz but the grain size ranges from clay to cobble in the aquifer. The Doxey Shale underlies the Elk City aquifer and acts as a confining unit, restricting the downward movement of ground water. The recharge polygon boundaries were transfered from a figure in the ground-water model thesis for the Elk City aquifer to a photocopy of a paper map and digitized. The source map was published at a scale of 1:63,360. The Elk City aquifer was divided into three subareas based on soil type and topography and assigned the recharge rates 2.00, 3.92, and 4.00 inches per year in a ground-water model thesis. These subareas and recharge rates are used in this data set. 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.

Información General

Información legal

This dataset has been created by US Government which means it is required to be in the public domain. However US copyright law only allows open access by US citizens, we have assumed the data is equivalently licensed as CC0 for the rest of the world as this is in the spirit of the US Government’s Open Data policy.

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