DS926 Digital surfaces and thicknesses of selected hydrogeologic units of the Floridan aquifer system in Florida and parts of Georgia, Alabama, and South Carolina -- Raster surface generated for the 10,000 mg/L total dissolved solids boundary across the study area

Digital surfaces and thicknesses of selected hydrogeologic units of the Floridan aquifer system were developed to define an updated hydrogeologic framework as part of the U.S. Geological Survey Groundwater Resources Program. This feature class contains a gridded surface depicting the altitude of the 10,000 mg/L total dissolved solids (TDS) boundary in reference to NGVD29. Surface is based on estimated TDS computed from geophysical logs. Where the aquifer system is fresh to base, the base of the aquifer system represents this surface.

本数据集针对佛罗里达含水层系统（Floridan aquifer system）中选定的水文地质单元的数字曲面与厚度进行了构建，旨在作为美国地质调查局（U.S. Geological Survey）地下水资源计划（Groundwater Resources Program）的一部分，更新其水文地质框架。该要素类（feature class）包含一幅网格化曲面，用于表征以1929年国家大地垂直基准（NGVD29）为参照的10000 mg/L总溶解固体（total dissolved solids, TDS）边界的海拔高度。该曲面基于由地球物理测井（geophysical logs）计算得到的估算TDS数值生成。当含水层系统为淡水至基底状态时，含水层系统的基底即对应此曲面。