Basalt System Characterization: Inverse Technique

by A. H. Lu, Rockwell Hanford Operations, Basalt, Waste Isolation Project, WA, USA,
William W. G. Yeh, Rockwell Hanford Operations, Basalt, Waste Isolation Project, WA, USA,



Document Type: Proceeding Paper

Part of: Computer Applications in Water Resources

Abstract: The Basalt Waste Isolation Project (BWIP) has been established to assess the feasibility of the Columbia River Basalt Group as a host medium for a high-level radioactive waste repository. Representative hydraulic parameter values are needed to predict site performance. Thus, a series of multiple-well large-scale, hydraulic stress (LHS) tests of selected hydrogeologic units in deep basalts are planned. An automatic parameter estimation technique has been incorporated into the quasi-three-dimensional model as one of the tools to be used for interpretation of the LHS tests. This paper presents test cases that incorporate important geological and hydrological features characteristic of Pasco Basin basalts. Results of preliminary studies are promising in terms of identifying critical parameters in one- and two-layer applications.

Subject Headings: Radioactive wastes | Parameters (statistics) | Recycling | Rivers and streams | Hydraulics | Hydrogeology | Model tests

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