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Relation of precipitation to annual ground-water recharge in the Edwards Aquifer, San Antonio area, Texas

Open-File Report 75-298

Prepared in cooperation with the city of San Antonio and the Texas Water Development Board
By:

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Abstract

Annual recharge data obtained from historical records and mean-annual precipitation data computed from rainfall records were used to develop simple linear-regression equations for use in estimating annual recharge for seven subbasins in the San Antonio area. Adjustments were made to the precipitation parameter to account for the effects of year-end storms. The standard errors of estimate of the regression equations ranged from 26 percent for the Blanco River basin to 45 percent for the area between the Sabinal and Medina River basins.

Annual-recharge estimates computed by use of the regression equations compared favorably with estimates made on the basis of observed streamflow and precipitation data.

The report includes a brief review of the geology and hydrology of the Edwards aquifer, a discussion of the preparation and evaluation of the precipitation data used in the regression analyses, and a brief summary of the method previously used to estimate recharge.

Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Relation of precipitation to annual ground-water recharge in the Edwards Aquifer, San Antonio area, Texas
Series title:
Open-File Report
Series number:
75-298
Year Published:
1975
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Austin, TX
Contributing office(s):
Texas Water Science Center
Description:
iii, 31 p.
Online Only (Y/N):
N
Additional Online Files (Y/N):
N