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Maps showing ground-water conditions in the lower San Pedro Basin area, Pinal, Cochise, Pima, and Graham counties, Arizona; 1979

Open-File Report 80-954

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Abstract

The lower San Pedro basin area includes about 1,550 square miles in southeastern Arizona. The area depends almost entirely on groundwater for its water supplies. In 1978 the estimated groundwater pumpage was 55,000 acre-feet, 30,000 acre-feet of which was used for irrigation. Withdrawal of groundwater has had little effect on groundwater levels in the area. Information shown on the maps includes depth to water, altitude of the water level, spring discharge, chemical quality of the groundwater, and irrigated area. Hydrographs of the water level in selected wells and a table of historical pumpage also are included. Scale 1:125,000. (USGS)

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Maps showing ground-water conditions in the lower San Pedro Basin area, Pinal, Cochise, Pima, and Graham counties, Arizona; 1979
Series title:
Open-File Report
Series number:
80-954
Edition:
WRI/OFR
Year Published:
1980
Language:
ENGLISH
Description:
2 maps ;80 x 84 cm.