1. Flow Loss in Jacob’s Well Hays County, TX
Elspeth Steinhauer

2. Jacob’s Well Located in Wimberley, TX Extends at least 2,900 ft
Fractured limestone bedrock
Stopped flowing July 2000
Not sure of recharge source

3. Possible Reasons for drop in flow
Population increase from 65,614 in 1990 to 97,589 in 2000 (nearly 50% increase)
Drought (
July 5, 1999
January 13, 2000

4. Hays County, TX

5. Map of 1992 Land Use

6. Potentiometric Surface Maps
2000
1986
2006
1996

8. Implications
Population increase from 97,589 in 2000 to124,432 in 2005, Cypress Creek continues to flow
Flow from Cypress Creek appears to be linked to rainfall
Conservation important, but maybe not the key factor here

9. Future Research
Data from USGS gage of Jacob’s Well flow soon available
Explore possibility of other recharge sources (Blanco River?)
Use time series in ArcGIS to link rainfall data to discharge data spatially and temporally

10. Questions