Review and Selection of Unsaturated Flow Models

by Mark Reeves, INTERA Inc, Austin, United States,
Noreen Jasak, INTERA Inc, Austin, United States,
J. O. Duguid, INTERA Inc, Austin, United States,

Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1993

Abstract: The Civilian Radioactive Waste Management System Management and Operating Contractor (CRWMS M&O) is conducting a thorough review and evaluation of existing flow and transport models. This paper discussed the M&O approach and lists some of the conclusions. A technical review of the models yielded four major conclusions. Generally speaking, existing code capabilities address the physics embodied in the requirements. Therefore, future development should focus on upgrading existing codes with respect to several inadequacies. The existing codes do not adequately characterize the effect of discrete fractures, the effect of nonequilibrium fracture-matrix flow, they do not adequately satisfy the need for site characterization, design and interpretation of natural events and processes. Their lack of efficiency seriously restricts their ability to perform mountain-scale calculations in reasonable amounts of computer processing times.

Subject Headings: Unsaturated flow | Fluid flow | Groundwater flow | Standards and codes | Water flow | Systems management | Mathematical models | Hydrologic models

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