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Seawater intrusion and potential yield of aquifers in the Soquel-Aptos area, Santa Cruz County, California

Water-Resources Investigations Report 80-84

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Abstract

Seawater has intruded the Purisima Formation in the interval 0-100 feet below sea level in the Soquel-Aptos area. It occurs in the central part of the area and extends inland about half a mile. The potential yields of the two principal aquifers in the Soquel-Aptos area are 4,400 acre-feet per year from the Purisima Formation and 1,500 acre-feet per year from the Aromas Sand. Pumping from the Purisima Formation, averaging about 5,400 acre-feet per year since 1970, has caused water levels along the coast to decline below sea level and has allowed seawater to enter the aquifer. Seawater intrusion and ground-water storage could be monitored in all depth zones by expanding the observation-well network to include a number of shallow wells, one deep well inland from the coast, and three deep wells along the coast. (USGS)

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Seawater intrusion and potential yield of aquifers in the Soquel-Aptos area, Santa Cruz County, California
Series title:
Water-Resources Investigations Report
Series number:
80-84
Edition:
-
Year Published:
1980
Language:
ENGLISH
Publisher:
U.S. Geological Survey, Water Resources Division,
Description:
iv, 29 p. :ill., maps ;28 cm.