Mojave Region Water-Level Study, 2012

Regional water-table maps of the Mojave River and Morongo ground-water basins have been published in reports by the U.S. Geological Survey (USGS) every two years since 1992. The water-level reports for the years 1992-2004 were published as USGS Water-Resources Investigations Reports or Scientific Investigations Reports and are available online as separate Portable Document Fomat (pdf) formatted reports, which can be accessed on the "References" page on this website; the water-level contours from most of the water-level maps are available also on this website: data page. Beginning in 2006, the biannually scheduled water-level reports and maps will be published on this interactive mapping website; any future water-level studies also will be available on this website..\r\n\r\nThe water-level studies include water-level contour maps drawn from data measured from wells during each study. Most of the studies demonstrate water-level changes by hydrographs that show long-term and short-term water-level changes, and by maps that compare water levels at individual wells between two consecutively published reports.

自1992年起，美国地质调查局（U.S. Geological Survey, USGS）每两年便会发布一次莫哈韦河与莫龙戈地下水盆地的区域地下水位图。1992至2004年的水位报告以《美国地质调查局水资源调查报告》（USGS Water-Resources Investigations Reports）或《科学调查报告》（Scientific Investigations Reports）的形式刊印，可通过本网站「参考文献」页面获取对应的独立可移植文档格式（Portable Document Format, PDF）报告；此外，多数水位图的等值线数据也可在本网站的数据页面获取。自2006年起，每两年一期的水位报告与图件将发布于本交互式测绘网站，未来所有水位研究成果也将上架本平台。

本次水位研究涵盖基于各次监测井实测数据绘制的水位等值线图。多数研究通过水文过程线展示水位的长期与短期变化，并通过对比两次连续发布报告中各监测井的水位数据，直观呈现水位变化情况。