Tracing Groundwater Flowpaths in the Edwards Aquifer Recharge Zone, Panther Springs Creek Basin, Northern Bexar County, TX

Citation

Material Information

Title:
Tracing Groundwater Flowpaths in the Edwards Aquifer Recharge Zone, Panther Springs Creek Basin, Northern Bexar County, TX
Creator:
Johnson, S
Schindel, G
Veni, G
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Groundwater ( local )
Recharge Zone ( local )
Texas ( local )
Hydrostratigraphy ( local )
Genre:
serial ( sobekcm )

Notes

Abstract:
The purpose of this study was to characterize groundwater-flow directions and velocities and to evaluate hydrostratigraphy in the Edwards Aquifer recharge zone in northern Bexar County in south-central Texas. It presents the findings of investigations by the Edwards Aquifer Authority regarding groundwater flowpaths, velocities, and hydrostratigraphy in the Panther Springs Creek groundwater basin, which is located in the San Antonio segment of the Balcones Fault Zone Edwards Aquifer. In a series of four phases, the Authority injected nontoxic organic dyes into six caves and sampled an array of 32 wells to track the dye movements. The tracer tests revealed discrete groundwater flowpaths near Panther Springs Creek with apparent (point-to-point) groundwater velocities ranging from 13 to 5,300 meters per day from the recharge zone to the transition/artesian zone of the Edwards Aquifer. The results indicated that groundwater flows freely across faults with displacements up to 104 meters through a single hydrostratigraphic unit comprised of the upper member of the Glen Rose Formation in the Upper Trinity Aquifer and the overlying Edwards Aquifer. Dye poured on the ground surface in an area with no observable karst features such as sinkholes, dissolutioned fractures, or caves demonstrated that the aquifer is vulnerable to contamination even in the absence of recognizable karst landforms.

Record Information

Source Institution:
University of South Florida Library
Holding Location:
University of South Florida
Rights Management:
This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.

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University of South Florida
Karst Information Portal

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