Georgia Water Science Center
This report is available online in pdf format (3 MB): USGS WRIR 02-4016 (
)
Phillip N. Albertson and Lynn J. Torak
U.S. Geological Survey Water-Resources Investigations Report 02-4016, 54 pages (Published 2002)
Simulation results indicate that ground-water withdrawal in the lower Apalachicola-Chattahoochee-Flint River basin during times of drought could reduce stream–aquifer flow and cause specific stream reaches to go dry. Of the 37 reaches that were studied, 8 reaches ranked highly sensitive to pumpage, 13 reaches ranked medium, and 16 reaches ranked low. Of the eight reaches that ranked high, seven contain at least one federally protected mussel species. Small tributary streams such as Gum, Jones, Muckalee, Spring, and Cooleewahee Creeks would go dry at lower pumping rates than needed to dry up larger streams. Other streams that were ranked high may go dry depending on the amount of upstream flow entering the reach; this condition is indicated for some reaches on Spring Creek. A dry stream condition is of particular concern to water and wildlife managers because adequate streamflow is essential for mussel survival.
Abstract
Introduction
Purpose and scope
Method of study
Description of the study area
Physiography
River and lake system
Precipitation
Geohydrology
Acknowledgments
Stream–aquifer relations
Simulation of stream–aquifer flow
Model representation of stream reaches
Sensitivity ranking procedure
Model limitations
Simulated effect of changing pumpage and boundary conditions on stream–aquifer flow
Simulated stream–aquifer flow in the vicinity of federally protected freshwater mussels
Summary and conclusions
References cited
Appendix A. Tables listing stream–aquifer flow, by reach, for simulated hydrologic and pumpage conditions
Appendix B. Graphs showing the simulated effect of pumpage on stream–aquifer flow for stream reaches
This report is available online in pdf format (3 MB): USGS WRIR 02-4016 ()
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