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Development of 3-D Lithostratigraphic and Confidence Models at Yucca Mountain, Nevada

by D. C. Buesch, U.S. Geological Survey, Las Vegas, United States,
J. E. Nelson, U.S. Geological Survey, Las Vegas, United States,
R. P. Dickerson, U.S. Geological Survey, Las Vegas, United States,
R. W. Spengler, U.S. Geological Survey, Las Vegas, United States,



Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1993

Abstract:

Computerized three-dimensional geologic models of potential high-level nuclear waste repositories such as Yucca Moutain, Nevada, are important for visualizing the complex interplay of (1) thickness and facies variations in lithostratigraphic units and (2) the disruption of these units by faults. The concept of a 'model of confidence' in the lithostratigraphic model is introduced to show where data are located versus regions where interpolations are included. Models of confidence can be based on (1) expert judgment, (2) geostatistical analysis, or (3) a simplified combination of these two methods. Linking of lithostratigraphic models and models of confidence provide guidelines for future characterization and modeling activities, as well as for design and construction of the Exploratory Studies Facility.

Subject Headings: Mathematical models | Radioactive wastes | Three-dimensional models | Geology | Computer models | Waste disposal | Subsurface investigation | Nevada | United States

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