Records of Ground-Water Recharge, Discharge, Water Levels and Chemical Quality of Water for the Edwards Aquifer in the San Antonio Area, Texas, 1934-80.
|Author||Reeves RD, Maclay RW and Davis MF (US Geological Survey)|
|Description||Title page: Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1934-80. Annual hydrologic report issued by the Edwards Underground Water District.|
|Report Number||Bulletin 40|
|Publisher||Edwards Underground Water District|
|Location||Edwards Aquifer - San Antonio Area|
The average annual ground-water recharge to the Edwards aquifer in the San Antonio area, Texas, from 1934 through 1980, was 594,800 acre-feet. The recharge during 1980 was 406,400 acre-feet . A maximum annual recharge of 1,711,200 acre-feet occurred during 1958, and a minimum annual recharge of 43,700 acre-feet occurred during 1956.
The estimated annual discharge by wells and springs during 1980 was 819,400 acre-feet. A maximum annual discharge of 960,900 acre-feet occurred during 1977 , and a minimum annual discharge of 388,800 acre-feet occurred during 1955. The annual discharge by wells was 491,100 acre-feet during 1980, which i s a record high for 1934- 80.
Although water levels in many of the wells in the Edwards aquifer fluctuated near the midpoint between record high and low levels during the last 6 months of 1980, the volume of ground water in storage in the aquifer was above average.
Analyses of water samples from 61 wells and 3 springs· show that the water is of a significantly better quality than the level established for public water systems.