Annual summary of ground-water conditions in Arizona, spring 1976 to spring 1977

Water-Resources Investigations Report 77-106



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, which is at a scale of 1:500,000, shows potential well production, depth of water in selected wells in spring 1977, and change in water level in selected wells from 1972 to 1977. The brief text that accompanies the maps summarizes the current ground-water conditions in the State. The withdrawal of ground water was about 5.5 million acre-feet in Arizona in 1976 of which about 4.7 million acre-feet was used for the irrigation. The Salt River Valley and the lower Santa Cruz basin are the largest agricultural areas in the State. For 1972-76, ground-water withdrawal in the two areas was about 8.2 to 4.9 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)

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Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Annual summary of ground-water conditions in Arizona, spring 1976 to spring 1977
Series title Water-Resources Investigations Report
Series number 77-106
DOI 10.3133/wri77106
Year Published 1977
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Description 2 Plates: 25.28 x 38.34 inches and 25.00 x 38.33 inches
Country United States
State Arizona
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