Waterborne Gradient Self-potential, Temperature, and Conductivity Logging of Lake Travis, Texas, near the Bee Creek Fault, March–April 2020
Dates
Publication Date
2020-06-10
Start Date
2020-03-25
End Date
2020-04-20
Citation
Ikard, S.J., and Sparks, D.D., 2020, Waterborne Gradient Self-potential, Temperature, and Conductivity Logging of Lake Travis, Texas, near the Bee Creek Fault, March–April 2020, https://doi.org/10.5066/P9CJDGN2.
Summary
This data release provides gradient self-potential (SP), conductivity, and temperature measurements made during an investigation of surface-water and groundwater exchange in Lake Travis near Austin, Texas, where the Colorado River is incised into two zones of the Cretaceous-age Trinity aquifer (the lower-zone, and several hydrostratigraphic units of the middle zone). The voltage, temperature, and conductivity data contained herein were continuously logged along three longitudinal profiles with the logging sensors positioned at depths of 3.0 and 6.1 meters vertically below the surface of Lake Travis, and in a cove along a fourth continuous, non-linear profile of intersecting tracks with the logging sensors positioned at a depth of 6.1 [...]
Summary
This data release provides gradient self-potential (SP), conductivity, and temperature measurements made during an investigation of surface-water and groundwater exchange in Lake Travis near Austin, Texas, where the Colorado River is incised into two zones of the Cretaceous-age Trinity aquifer (the lower-zone, and several hydrostratigraphic units of the middle zone). The voltage, temperature, and conductivity data contained herein were continuously logged along three longitudinal profiles with the logging sensors positioned at depths of 3.0 and 6.1 meters vertically below the surface of Lake Travis, and in a cove along a fourth continuous, non-linear profile of intersecting tracks with the logging sensors positioned at a depth of 6.1 meters beneath the water surface. Each of the longitudinal profiles (profiles 1– 3) began at the Collier boat ramp in Pace Bend Park and ended at the first point-bar downstream from the Hurst Harbor Marina— a distance of about 31 kilometers. A submerged groundwater spring (Deadhead Spring) that discharges from the middle zone of the Trinity aquifer is located along this reach of Lake Travis, and the Bee Creek fault also intersects this reach at two or more different locations. Profile 4 represents a two-dimensional map in the cove. The resulting data sets contained in this data release include more than 40,000 measurements of waterborne gradient self-potential, water temperature and conductivity, and the geospatial coordinates of each measurement.
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Data.txt
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Lake_Travis_Geophysical_Logging_Metadata.xml Original FGDC Metadata
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Purpose
The purpose of this study was to use waterborne self-potential (SP) logging in combination with surface-water temperature and conductivity logging to investigate surface-water and groundwater exchanges in Lake Travis, Austin, Texas along a 31-kilometer reach where the lower Colorado River is incised into the lower and middle zones of the Trinity aquifer.
On July 6, 2020, the header of the data file was updated to correct the units of conductivity from milliseimens_per_centimeter to microsiemens_per_centimeter.
