Potential effects of dredging the South Fork Obion River on ground-water levels near Sidonia, Weakley County, Tennessee
Water-Resources Investigations Report
90-4041
By: Patrick Tucci and G. E. Hileman
Links
- More information: Publisher Index Page (html)
- Download citation as: RIS | Dublin Core
Abstract
The U.S. Army Corps of Engineers has proposed dredging an approximate 7-mile reach of the South Fork Obion River near Sidonia, Tennessee. This dredging will have an effect on ground-water levels in a wetland area near the river. The river cuts into a sandy aquifer that is confined by an overlying clay layer. Ground water in the confined aquifer flows from a ridge on the north side of the study area toward the river, Estimates of aquifer transmissivity range from 3,300 to 18,800 feet squared per day.
Assuming a 3-foot decline in stream stage due to dredging, the maximum decline in ground-water levels would be about 2.4 feet at low flow. Ground-water levels in the aquifer would decline by at least 2 feet at a distance of 0.5 mile from the river within 60 days after the change in stream stage, regardless of the assumed transmissivity value. Water-level declines in the upper clay layer probably would be much smaller. The time required for a specified change in ground-water level is dependent on the aquifer properties and distance from the river.
Suggested Citation
Tucci, P., Hileman, G.E., 1992, Potential effects of dredging the South Fork Obion River on ground-water levels near Sidonia, Weakley County, Tennessee: U.S. Geological Survey Water-Resources Investigations Report 90-4041, iii, 12 p. :ill. ;28 cm., https://doi.org/10.3133/wri904041.
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Potential effects of dredging the South Fork Obion River on ground-water levels near Sidonia, Weakley County, Tennessee |
| Series title | Water-Resources Investigations Report |
| Series number | 90-4041 |
| DOI | 10.3133/wri904041 |
| Year Published | 1992 |
| Language | ENGLISH |
| Publisher | U.S. Dept. of the Interior, U.S. Geological Survey ; Books and Open-File Reports Section [distributor], |
| Description | iii, 12 p. :ill. ;28 cm. |