Ground-water levels in the Great Basin region of Nevada, Utah, and adjacent states

The Great Basin Regional Aquifer-System Analysis (RASA) is the tenth study in a national program b the U.S. Geological Survey to analyze regional ground-water systems that comprise a major part of the Nation’s water supply. The main objectives of RASA studies are to: (1) Describe the ground-water systems as they exist today, (2) analyze the changes that have led to the system’s present condition, (3) combine the results of previous studies in a regional analysis, and (4) provide means by which effects of future ground-water development can be estimated (G.D. Bennett, U.S. Geological Survey, written comm., 1978).

This atlas is Chapter B of a three-part series. Chapter A delineates and describes hydrogeologic units in the Great Basin, and Chapter C shows inferred directions of ground-water flow and individual flow systems.