Annual summary of ground-water conditions in Arizona, spring 1977 to spring 1978

Water-Resources Investigations Report 78-144



The withdrawal of ground water was about 5.5 million acre-feet in Arizona in 1977. About 4.7 million acre-feet of ground water was used for the irrigation of crops in 1977. The Salt River Valley and the lower Santa Cruz basin are the largest agricultural areas in the State. For 1973-77, ground-water withdrawal in the two areas was about 8.1 and 5.1 million acre-feet, respectively, and, in general, water levels are declining. Other areas in which ground-water withdrawals have caused water-level declines are the Willcox, San Simon, upper Santa Cruz, Avra Valley, Gila Bend, Harquahala Plains, and McMullen Valley areas. 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. The main map, scale 1:500 ,000, shows potential well production, depth to water in selected wells in spring 1978, and change in water level in selected wells from 1973 to 1978. The brief text that accompanies the maps summarizes the current ground-water conditions in the State. (Woodard-USGS)

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Annual summary of ground-water conditions in Arizona, spring 1977 to spring 1978
Series title Water-Resources Investigations Report
Series number 78-144
DOI 10.3133/wri78144
Year Published 1978
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Description 2 Plates: 24.89 x 38.32 inches and 24.68 x 37.95 inches
Country United States
State Arizona
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