Groundwater Budgets for Detrital, Hualapai, and Sacramento Valleys, Mohave County, Arizona, 2007?08

The United States Geological Survey, in cooperation with the Arizona Department of Water Resources, initiated an inves-tigation of the hydrogeology and water resources of Detrital, Hualapai, and Sacramento Valleys in northwestern Arizona in 2005, and this report is part of that investigation. Water budgets were developed for Detrital, Hualapai, and Sacramento Val-leys to provide a generalized understanding of the groundwater systems in this rural area that has shown some evidence of human-induced water-level declines. The valleys are within the Basin and Range physiographic province and consist of thick sequences of permeable alluvial sediment deposited into basins bounded by relatively less permeable igneous and metamorphic rocks.