BSEACD Report of Investigations 2013-0501
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ABSTRACT On January 24, 2012, a 4.5 inch rainfall filled a Storm Water Retention Pond (SWRP) located in the recharge zone of the Barton Springs segment of the Edwards Aquifer with about 10 feet of stormwater. Subsequently, a cover-collapse sinkhole developed within the floor of the SWRP, measuring about 30 ft in diameter and 12 ft deep. About 7 million gallons of stormwater drained into the aquifer through this opening. To determine the path, velocity, and destination of stormwater entering the sinkhole, a dye trace was conducted. Phloxine B was injected into the sinkhole on February 3, 2012. The dye was detected at one well and arrived at Barton Springs in less than 4 days, corresponding to a minimum velocity of 1.3 mi/day. The successful dye trace confirmed conclusions of previously published reports by demonstrating that the sinkhole is well integrated into the aquifer system, and that groundwater in the study area is within the Sunset Valley Groundwater Basin. Phloxine B proved to be a very good, conservative tracer through the collapsed terra rosa material of the sinkhole. Open Access - Permission by Publisher See Extended description for more information.
Barton Springs (Austin, Texas, United States), United States, Geology
1 online resource
Barton Springs/Edwards Aquifer Conservation District, "Dye tracing results from the Arbor Trails Sinkhole, Barton Springs segment of the Edwards Aquifer, Austin, Texas BSEACD Report of Investigations 2013-0501" (2013). KIP Data Sets and Technical Reports. 66.