Program plan for TNX Area groundwater characterization wells [electronic resource]
The TNX Area post-Cretaceous hydrogeological section consists of an unconfined aquifer in recent to Pliestocene age sediments and a confined aquifer in tertiary aged sediments. The unconfined aquifer is a local water bearing reservoir and will not be correlated to a specific stratigraphic unit at th...
Saved in:
| Online Access: |
Online Access |
|---|---|
| Corporate Authors: | , |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C : Oak Ridge, Tenn. :
United States. Dept. of Energy. Office of the Assistant Secretary for Defense Programs ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1989.
|
| Subjects: |
| Summary: | The TNX Area post-Cretaceous hydrogeological section consists of an unconfined aquifer in recent to Pliestocene age sediments and a confined aquifer in tertiary aged sediments. The unconfined aquifer is a local water bearing reservoir and will not be correlated to a specific stratigraphic unit at this time. Depth to the water table ranges from 25 feet at the New TNX Seepage Basin to 50 feet at the Old TNX Seepage Basin. The unconfined aquifer is 45--50 feet thick and outcrops in the swamp to the west of TNX. The hydraulic gradient in the unconfined aquifer decreases westerly across the TNX Area from 0.05 to 0.01. The unconfined aquifer is separated from the underlying confined aquifer by a sandy slit aquitard (A1) which is approximately 5--10 feet thick. Researchers reported an increase in hydraulic head across this unit of approximately 8 feet which results in an upward gradient between the unconfined and confined aquifer. The confined Tertiary aquifer (C1) at TNX is 25--30 feet thick and can generally be found 60 to 90 feet below the surface. The C1 aquifer is part of the aquifer commonly referred to as the Congaree'' which occurs in the Congaree Formation. The C1 aquifer lies on the Lower Tertiary aquitard (A2) which is 45--55 feet thick and is commonly referred to as the Ellenton Formation.'' Currently there is an upward gradient across A2 with a head differential of 28 feet. Regional hydrogeologic models indicate that the C1 aquifer discharges to the Savannah River producing westward groundwater flow in C1. 3 figs., 1 tab. |
|---|---|
| Item Description: | Published through the Information Bridge: DOE Scientific and Technical Information. 05/19/1989. "wsrc-rp-89-269" "DE90000655" Nichols, R.L. |