Digital map of saturated thickness in 1980 for the High Plains aquifer in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming

This digital data set consists of saturated thickness contours
for the High Plains aquifer in the central United States. The
High Plains aquifer extends from south of 32 degrees to almost
44 degrees north latitude and from 96 degrees 30 minutes to 106
degrees west longitude. The outcrop area covers 174,000 square
miles and is present in Colorado, Kansas, Nebraska, New Mexico,
Oklahoma, South Dakota, Texas, and Wyoming.

This digital data set was created by digitizing the saturated
thickness contours from a 1:1,000,000-scale base map created by
the U.S. Geological Survey High Plains Regional Aquifer-System
Analysis (RASA) project (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.) The data
are not intended for use at scales larger than 1:1,000,000.

本数字数据集包含美国中部高平原含水层（High Plains aquifer）的饱和厚度等值线。高平原含水层的分布范围为北纬32°以南至近44°，西经96°30′至106°。其出露面积达17.4万平方英里，覆盖科罗拉多州、堪萨斯州、内布拉斯加州、新墨西哥州、俄克拉荷马州、南达科他州、得克萨斯州与怀俄明州。
本数字数据集通过数字化美国地质调查局高平原区域含水层系统分析（High Plains Regional Aquifer-System Analysis，简称RASA）项目所绘制的1:100万比例尺底图中的饱和厚度等值线制作完成（Gutentag, E.D., Heimes, F.J., Krothe, N.C., Luckey, R.R. 及Weeks, J.B., 1984, 《科罗拉多州、堪萨斯州、内布拉斯加州、新墨西哥州、俄克拉荷马州、南达科他州、得克萨斯州及怀俄明州部分区域高平原含水层水文地质》：美国地质调查局专业报告1400-B，共63页）。本数据集不适用于比例尺大于1:100万的应用场景。