Records of Ground-Water Recharge, Discharge, Water Levels and Chemical Quality of Water for the Edwards Aquifer in the San Antonio Area, Texas, 1934-79.
|Author||Reeves RD, Maclay RW, Grimm KC and Davis MF (US Geological Survey)|
|Description||Title page: Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1934-79. Annual hydrologic report issued by the Edwards Underground Water District.|
|Report Number||Bulletin 39|
|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 1979, was 598,800 acre-feet. The recharge in 1979 was 1,117,800 acre-feet, which was the fifth highest estimated recharge since 1934. A maximum annual recharge of 1,711,200 acre- feet occurred in 1958, and a minimum annual recharge of 43,700 acre-feet occurred in 1956.
The estimated annual discharge by wells and springs in 1979 was 914,500 acre-feet . A maximum annual discharge of 960,900 acre-feet occurred in 1977, and a minimum annual discharge of 388,800 acre-feet occurred in 1955.
During 1979, water levels in wells in the Edwards aquifer fluctuated near record highs; consequently, the volume of ground water in storage in the aquifer also was near the record high.
Analyses of water samples from 77 wells and 3 springs show no evidence of significant degradation of water quality in the Edwards aquifer, and the data show no trend of degradation in water quality.
Search for Documents
Explore EAA's Scientific Reports
- All Reports
- RZ Protection
- Aquifer Levels
- Remote Sensing
- Overview Studies
- Hydrology and Hydrogeology
- Groundwater Recharge, Recharge Zone
- Groundwater Movement
- Geomorphology and Caves
- Weather Modification
- Water Use and Conservation
- Water Resources Planning and Management
- Floods and Drought
- Water Quality
- Surface Water / Groundwater Relationship
- Springs, Groundwater Discharge