In south-central Texas, the amount of streamflow in the Guadalupe River is a primary concern for local and downstream communities because of municipal, agricultural, wildlife, and recreational uses. Understanding the flow paths and rates of exchange between the surface water in the river and the groundwater in the underlying Carrizo-Wilcox aquifer is vital for understanding the water budget and streamflow variations. In areas where the Guadalupe River crosses the Carrizo-Wilcox aquifer outcrop, the surface-water and groundwater exchanges are not well characterized. Traditional methods to measure these interactions, such as measuring differences in surface-water flows at different locations to infer gains and losses between the locations, are not feasible along this stretch of the Guadalupe River because of upstream dams that cause large daily fluctuations in streamflow. Consequently, the U.S. Geological Survey, in cooperation with the Guadalupe-Blanco River Authority, applied geophysical methods in an exploratory study to identify reaches of the river where streamflow gains and losses (surface-water/groundwater exchanges) might be occurring.
Citation Information
| Publication Year | 2018 |
|---|---|
| Title | New insights into surface-water/groundwater exchanges in the Guadalupe River, Texas, from floating geophysical methods |
| DOI | 10.3133/fs20183057 |
| Authors | Scott J. Ikard, J. Ryan Banta, Gregory P. Stanton |
| Publication Type | Report |
| Publication Subtype | USGS Numbered Series |
| Series Title | Fact Sheet |
| Series Number | 2018-3057 |
| Index ID | fs20183057 |
| Record Source | USGS Publications Warehouse |
| USGS Organization | Texas Water Science Center |
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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
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 connectivi - Connect