Flow Loss in Jacob’s Well Hays County, TX Elspeth Steinhauer http://www.visitwimberley.com/articles-events/jacobsWellTests.shtml

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

Possible Reasons for drop in flow Population increase from 65,614 in 1990 to 97,589 in 2000 (nearly 50% increase) Drought (http://synergyx.tacc.utexas.edu/Spotlight/Texas_drought/drought_playa.html) July 5, 1999 January 13, 2000

Hays County, TX

Map of 1992 Land Use

Potentiometric Surface Maps 2000 1986 2006 1996

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

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

Questions