Digital data set of water-level changes in the High Plains aquifer in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming, 1980 to 1996

These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set consists of digital water-level-change contours for the High Plains aquifer in the Central United States, 1980 to 1996. The High Plains aquifer extends from south of 32 degrees to almost 44 degrees north latitude and from 96 degrees 30 minutes to 104 degrees west longitude. The aquifer underlies about 174,000 square miles in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming. This digital data set [...]

本数据集发布于2016年10月1日之前，彼时美国地质调查局（United States Geological Survey, USGS）的科学数据审核、批准与发布政策尚未生效——该政策详见《美国地质调查局勘测手册第502.8章：基础科学实践：科学数据发布审核与批准》。
本数据集包含1980年至1996年美国中部高平原含水层（High Plains aquifer）的数字化水位变化等值线数据。
高平原含水层的地理范围为北纬32°以南至北纬近44°，西经96°30′至西经104°。
该含水层覆盖科罗拉多州、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、得克萨斯州以及怀俄明州的部分区域，覆盖面积约17.4万平方英里。
本数字化数据集 [...]