Applications of Fracture-Flow Modeling to Site Characterization

by W. Dershowitz, Golder Associates, United States,
T. Doe, Golder Associates, United States,
J. Geier, Golder Associates, United States,

Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1990


This paper describes practical applications of discrete-fracture approaches for design and analysis of groundwater flow about high-level radioactive waste repositories. The paper presents a survey of the approach from data collection and analysis through geometric flow modeling and interpretation. The examples are primarily taken from characterization studies in Swedish granite, notably at the Stripa facility. Hydrologic modeling has traditionally used porous continua, which represent the hydrologic properties of the rock either as being homogeneous or having a small number of regions each having homogeneous properties. This continuum approach overlooks many of the heterogeneities in rock, which have a major affect on a rock's capacity for hydrologic isolation.

Subject Headings: Hydrologic properties | Rock properties | Cracking | Homogeneity | Hydrologic models | Hydraulic fracturing | Radioactive wastes | Groundwater

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