Hydrologic studies within the Pasco Basin
Technical Report
·
OSTI ID:6724424
As part of the Basalt Waste Isolation Project (BWIP), hydrologic studies are being performed to provide an evaluation of groundwater systems within the Columbia River Basalt Group. These studies are focused on the Hanford Site, which is located within the Pasco Basin in south-central Washington. Hydrologic studies within the Pasco Basin involve the areal and vertical characterization of hydraulic head, hydrologic properties, and hydrochemical content for the various basalt groundwater systems. Currently, in excess of 150 test intervals have been tested for hydraulic properties, while in excess of 80 horizons have been analyzed for hydrochemical characteristics at about 30 borehole sites within the Pasco Basin. Data obtained from these studies provide input for numerical modeling of groundwater flow and solute transport. Results from numerical modeling are used for evaluating potential waste migration as a function of space and time. In the Pasco Basin, geologic structures influence groundwater flow patterns within basalt aquifer systems. Potentiometric data and hydrochemical evidence collected from recent studies indicate that geologic structures act as areal hydrologic barriers and in some instances, regions of enhanced vertical conductivity. 8 figures.
- Research Organization:
- Rockwell International Corp., Richland, WA (USA). Energy Systems Group
- DOE Contract Number:
- AC06-77RL01030
- OSTI ID:
- 6724424
- Report Number(s):
- RHO-BW-SA-251-P; CONF-821205-11; ON: DE83001749
- Country of Publication:
- United States
- Language:
- English
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