Description: This data set consists of the administrative hydrographic area boundaries for Nevada at 1:750,000-scale and estimates of natural recharge, artificial recharge, pumpage, and net ground-water flow for each basin where the information is available. The source of the hydrographic area delineations is a 1974 ground-water map (Rush, 1974.) The hydrographic area boundaries were originally delineated by Rush in 1968 and compiled by Cardinalli and others in 1968. The recharge estimates were compiled from reports published between 1948 and 2000. The data were tabulated and published by Evetts and Lopes in 2004.