14.86 km Profiles of the Electric and Self-potential Fields Measured in the Lower Guadalupe River Channel, Texas Interior Gulf Coastal Plain, September 2016

Dates

Publication Date: 2017-12-15
Time Period: 2016-09-23

Citation

Ikard, S.J., Teeple, A.P., Payne, J.D., Stanton, G.P., and Banta, J.R., 2017, 14.86 km Profiles of the Electric and Self-potential Fields Measured in the Lower Guadalupe River Channel, Texas Interior Gulf Coastal Plain, September 2016: U.S. Geological Survey data release, https://doi.org/10.5066/F7CJ8CDH.

Summary

This data release consists of three geophysical data sets measured in the lower Guadalupe River channel, south-central Texas, and one supplementary geophysical data set measured in a laboratory. The lower Guadalupe River is incised into the outcrop of the Carrizo-Wilcox aquifer in south-central Texas. The river and the aquifer are hydraulically connected across the outcrop, although the connectivity is obscured by alluvium and surface-water and groundwater exchange dynamics are currently poorly understood. The data sets were therefore produced to investigate surface-water and groundwater exchange dynamics between the lower Guadalupe River and the Carrizo-Wilcox aquifer, and consist of (1) a 14.86 kilometer (km) profile of waterborne [...]

Summary

This data release consists of three geophysical data sets measured in the lower Guadalupe River channel, south-central Texas, and one supplementary geophysical data set measured in a laboratory. The lower Guadalupe River is incised into the outcrop of the Carrizo-Wilcox aquifer in south-central Texas. The river and the aquifer are hydraulically connected across the outcrop, although the connectivity is obscured by alluvium and surface-water and groundwater exchange dynamics are currently poorly understood. The data sets were therefore produced to investigate surface-water and groundwater exchange dynamics between the lower Guadalupe River and the Carrizo-Wilcox aquifer, and consist of (1) a 14.86 kilometer (km) profile of waterborne gradient self-potential (SP) data; (2) a 20 km profile of waterborne resistivity tomography data; and (3) discrete profiles of water temperature and electric conductivity in the channel, acquired with a handheld conductivity probe. The shorter gradient SP profile overlaps the longer waterborne resistivity tomography profile. Gradient SP profile data were measured with floating 2 meter dipole by logging potential differences between the dipole electrodes at a frequency of one sample per second while the dipole floated in a downstream direction in the channel. Resistivity tomography profile data were measured using the IRIS Syscal Pro direct-current resistivity meter connected to an 80 m long floating, multi-electrode cable containing 13 stainless-steel electrodes. The resistivity meter incorporated an echo sounder to determine the depth of the water column along the resistivity profile, and the data along each respective profile were geospatially located with a differential global positioning system. The laboratory data set contains approximately 4.5 hours of logged measurements of the potential difference between the electrodes of the dipole used for gradient SP profiling in the lower Guadalupe River. This data set was used to correct the gradient SP field measurements for their transient drift characteristics based upon the drift-characteristics that were observed in the laboratory. The companion journal paper to this data release explores the utility of these water-borne geoelectric methods in delineating gaining and losing channel reaches, and demonstrates that geoelectric signals in the form of total electric field strength can be logged with an electric dipole and decomposed into component SP signals and interpreted with respect to regional and local groundwater flow patterns, net gaining and losing segments of a surface channel, and localized gains and losses distributed throughout a channel that are attributable to bed-form induced hyporheic exchange flows.

Contacts

Point of Contact :: Public Information Officer, Oklahoma-Texas Water Science Center
Originator :: Scott Ikard, Andrew Teeple, Jason Payne, Greg Stanton, Ryan Banta
Metadata Contact :: Public Information Officer, Oklahoma-Texas Water Science Center
Publisher :: U.S. Geological Survey
Distributor :: U.S. Geological Survey - Science Base
USGS Mission Area :: Water Resources
SDC Data Owner :: Oklahoma-Texas Water Science Center

Attached Files

sorting

Metadata First

Recent First

Alphabetical

Click on title to download individual files attached to this item.

New_Insights_SWGW_Exchange_Metadata.xml Original FGDC Metadata	View	48.75 KB	application/fgdc+xml
Self_Potential_Processing_Code_Matlab.txt		15.77 KB	text/plain
Temperature and Conductivity.txt		1.72 KB	text/plain
Temperature and Conductivity.csv		2.27 KB	text/csv
Temperature and Conductivity.xlsx		12.47 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Laboratory Electrode Drift.txt		326.17 KB	text/plain
Laboratory Electrode Drift.csv		328.68 KB	text/csv
Laboratory Electrode Drift.xlsx		493.05 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Self Potential Data.txt		2.19 MB	text/plain
Self Potential Data.csv		2.3 MB	text/csv
Self Potential Data.xlsx		2.94 MB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Electric Resistivity Tomography Data.txt		1.22 MB	text/plain
Electric Resistivity Tomography Data.csv		1.27 MB	text/csv
Electric Resistivity Tomography Data.xlsx		1.91 MB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

Related External Resources

Type: Related Primary Publication

Ikard, S.J., Banta, J.R., and Stanton, G.P., 2018, New insights into surface-water/groundwater exchanges in the Guadalupe River, Texas, from floating geophysical methods: U.S. Geological Survey Fact Sheet 2018–3057, 4 p., https://doi.org/10.3133/fs20183057.	https://doi.org/10.3133/fs20183057

Purpose

The data sets contained in this data release were produced to investigate surface-water and groundwater exchange dynamics between the lower Guadalupe River and the Carrizo-Wilcox aquifer.

14.86 km Profiles of the Electric and Self-potential Fields Measured in the Lower Guadalupe River Channel, Texas Interior Gulf Coastal Plain, September 2016

Dates

Citation

Summary

Summary

Contacts

Attached Files

sorting

Metadata First

Recent First

Alphabetical

Purpose

Map

Communities

Tags

Provenance

Additional Information

Identifiers

Item Actions

View Item as ...

Save Item as ...

View Item...

Dates

Citation

Summary

Summary

Contacts

Attached Files sorting Metadata First Recent First Alphabetical

Related External Resources

Purpose

Map

Communities

Tags

Provenance

Additional Information

Identifiers

Item Actions

View Item as ...

Save Item as ...

View Item...

Attached Files

sorting

Metadata First

Recent First

Alphabetical