Annual summary of ground-water conditions in Arizona, spring 1975 to spring 1976

Water-Resources Investigations Report 77-10



Two small-scale maps of Arizona show (1) pumpage of ground water by areas and (2) the status of the ground-water inventory in the State. A larger map of the State at a scale of 1:500,000 shows potential well production, depth to water in selected wells in spring 1976, and change in water level in selected wells from 1971 to 1976. The brief text that accompanies the maps summarizes the current ground-water conditions in the State. The withdrawal of ground water in Arizona was about 5.6 million acre-feet in 1975, of which about 4.7 million acre-feet was used for the irrigation of crops. The Salt River Valley and the lower Santa Cruz basin are the largest agricultural areas in the State. For 1971-75, ground-water withdrawal in the two areas was about 8.3 and 4.7 million acre-feet, respectively, and, in general, water levels are declining. Other areas in which ground-water withdrawals have caused large water-level declines are the Willcox, San Simon, upper Santa Cruz, Avra Valley, Gila Bend, Harquahala Plains, and McMullen Valley areas. (Woodard-USGS)

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Annual summary of ground-water conditions in Arizona, spring 1975 to spring 1976
Series title Water-Resources Investigations Report
Series number 77-10
DOI 10.3133/wri7710
Year Published 1977
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Description 2 Plates: 24.83 x 24.63 inches and 24.63 x 37.92 inches
Country United States
State Arizona
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