Testing Models of Flow and Transport in Unsaturated Porous Media

by Everett P. Springer, Los Alamos Natl Lab, Los Alamos, United States,
Malcolm D. Siegel, Los Alamos Natl Lab, Los Alamos, United States,
Polly L. Hopkins, Los Alamos Natl Lab, Los Alamos, United States,
Robert J. Glass, Los Alamos Natl Lab, Los Alamos, United States,



Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1993

Abstract:

The design of an intermediate-scale flow and transport experiment in an unsaturated porous media is described. This experiment will be conducted a 3-m-diameter by 6-m-long caisson filled with silica sand. The study has been designed to minimize uncertainties in the conceptual model governing flow and transport of nonreactive tracers and to evaluate predictions of field tracer migration using laboratory data. Data from laboratory characterization of hydraulic and geochemical properties of the sand and tracer were used in preliminary modeling and sensitivity analyses to determine optimal fluid flux, influent tracer concentrations, and locations of sensors and sampling devices. Alternative approaches to compare observed and predicted data for model evaluation are discussed.

Subject Headings: Sensitivity analysis | Probe instruments | Porous media flow | Laboratory tests | Fluid flow | Data analysis | Waste disposal

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