Digital data sets that describe aquifer characteristics of the Central Oklahoma aquifer in central Oklahoma

This data set consists of digitized polygons of a constant recharge value for the Central Oklahoma aquifer in central Oklahoma. This area encompasses all or part of Cleveland, Lincoln, Logan, Oklahoma, Payne, and Pottawatomie Counties. The Central Oklahoma aquifer includes the alluvial and terrace deposits along major streams, the Garber Sandstone and Wellington Formations, and the Chase, Council Grove, and Admire Groups. The Quaternary-age alluvial and terrace deposits consist of unconsolidated clay, silt, sand, and gravel. The Permian-age Garber Sandstone and Wellington Formations consist of sandstone with interbedded siltstone and mudstone. The Permian-age Chase, Council Grove, and Admire Groups consist of sandstone, shale, and thin limestone. The recharge data set was created from digital data sets developed to produce a map for a previously published report. Most of the recharge to the Central Oklahoma aquifer is infiltration of precipitation through outcrops of the Garber Sandstone and Wellington Formations, the Chase, Council Grove, and Admire Groups, and the alluvial and terrace deposits. The median recharge to the aquifer is 1.61 inches per year.本数据集包含俄克拉荷马州中部地区中央奥克拉荷马含水层（Central Oklahoma aquifer）恒定补给值的数字化多边形要素。该研究区域涵盖克利夫兰（Cleveland）、林肯（Lincoln）、洛根（Logan）、奥克拉荷马、佩恩（Payne）以及波特瓦特米（Pottawatomie）县的全部或部分辖区。中央奥克拉荷马含水层涵盖沿主要河道分布的冲积与阶地堆积物、加伯砂岩组（Garber Sandstone）与惠灵顿地层（Wellington Formations），以及蔡斯群（Chase Group）、考恩斯格罗夫群（Council Grove Group）与阿德米尔群（Admire Group）。第四纪（Quaternary）冲积与阶地堆积物由未固结的黏土、粉砂、砂及砾石组成。二叠纪（Permian）形成的加伯砂岩组与惠灵顿地层以夹有粉砂岩与泥岩的砂岩为主要构成。二叠纪形成的蔡斯群、考恩斯格罗夫群与阿德米尔群则由砂岩、页岩及薄层石灰岩组成。 本补给数据集源自为制作此前已发表研究报告中的地图所开发的数字化数据集。中央奥克拉荷马含水层的大部分补给来自降水通过加伯砂岩组、惠灵顿地层、蔡斯群、考恩斯格罗夫群、阿德米尔群以及冲积与阶地堆积物的露头区入渗补给。该含水层的补给量中位数为1.61英寸/年。