Historical boundary of the Death Valley regional ground-water flow system by Harrill and Prudic (1998), for the Death Valley regional ground-water flow system study, Nevada and California

This digital data set is a historical definition of the extent (approximately 42,600 square-kilometers) and lateral boundary of the Death Valley regional ground-water flow system (modified from Harrill and others, 1988; and Harrill and Prudic, 1998). Harrill and others (1988) developed boundaries for the major ground-water flow systems in the Great Basin region of Nevada, Utah, and adjacent states using the boundaries of hydrographic areas. Harrill and Prudic (1998) refined the delineation of the Death Valley ground-water flow system by using a more accurate base map. The studies by Harrill and others (1988) and Harrill and Prudic (1998) served as historical references used to support development of the transient ground-water model of Death Valley regional ground-water flow system (DVRFS) completed in 2004 by the USGS (see "Larger Work Citation", Chapter A, pages 9-10, for details).本数字数据集为死亡谷区域地下水流系统（Death Valley regional ground-water flow system）的范围（约42600平方千米）与横向边界的历史定义，修改自Harrill等人1988年及Harrill与Prudic1998年的研究成果。Harrill等（1988）借助水文区域边界，划定了美国内华达州、犹他州及邻近州所属大盆地区域的主要地下水流系统边界。Harrill与Prudic（1998）则采用精度更高的底图，对死亡谷地下水流系统的划界工作进行了细化完善。这两项研究作为历史参考依据，支撑了美国地质调查局（United States Geological Survey, USGS）于2004年完成的死亡谷区域地下水流系统瞬态地下水流模型（DVRFS）的开发工作，详细信息详见"Larger Work Citation"A章节第9-10页。