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Preconstruction and postconstruction ground-water levels, Lock and Dam 3, Red River Valley, Louisiana

Open-File Report 79-920

Prepared by the U.S. Geological Survey in cooperation with the Soil Conservation Service and U.S. Army Corps of Engineers
By:
,

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Abstract

Proposed construction of a series of locks and dams in the Red River in Louisiana will cause a permanent increase in average river stage. The potentiometric surface of the shallow alluvial aquifer and the water table in the fine-grained material confining the aquifer will be affected. The purpose of this study, using digital-modeling techniques, was to predict the average postconstruction potentiometric surface (steady state) and the water table (nonsteady state) so that potential effects of the water-level changes could be evaluated. Plans for lock and dam 3 at realined mile 111 (kilometer 179) above the mouth of the Red River call for a pool elevation of 87 feet (27 meters) and will cause an average increase in river stage ranging from 21 to 3.5 feet (l.4 to 1.1 meters). As a result, ground-water levels will be raised to near land surface in low areas east of the river from the damsite to Aloha and in a 0.5-mile (0.8-kilometer) strip along the west side extending 9 miles (14 kilometers) above the dam. The potentiometric surface may be above land surface locally near the dam. The magnitude of ground-water-level fluctuations near the river will be reduced to less than half the preconstruction range.

Geospatial Extents

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Preconstruction and postconstruction ground-water levels, Lock and Dam 3, Red River Valley, Louisiana
Series title:
Open-File Report
Series number:
79-920
Year Published:
1979
Language:
English
Publisher:
U.S. Geological Survey
Description:
6 Plates: 32.84 x 42.30 inches and smaller
Country:
United States
State:
Louisiana
Other Geospatial:
Red River Valley
Scale:
62500