New insights into surface-water/groundwater exchanges in the Guadalupe River, Texas, from floating geophysical methods

Fact Sheet 2018-3057
Prepared in cooperation with the Guadalupe-Blanco River Authority
By: , and 

Links

  • Document: Report (19.0 MB pdf)
  • Related Work: Journal article - New insights on scale-dependent surface and groundwater exchange from a floating self-potential dipole
  • Data Release: USGS data release - 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
  • Download citation as: RIS | Dublin Core

Abstract

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.


Suggested Citation

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.

ISSN: 2327-6932 (online)

ISSN: 2327-6916 (print)

Study Area

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title New insights into surface-water/groundwater exchanges in the Guadalupe River, Texas, from floating geophysical methods
Series title Fact Sheet
Series number 2018-3057
DOI 10.3133/fs20183057
Year Published 2018
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Texas Water Science Center
Description Report: 4 p.; Data Release
Country United States
State Texas
Other Geospatial Guadalupe River
Online Only (Y/N) N