In many geoenvironmental problems the interpretation of infiltration process involves flow analysis through unsaturated porous media. Under conditions of unsaturated behavior soil permeability is a variable related to suction or volumetric water content. This work shows infiltration tests results conducted in laboratory. Tests were conducted on natural and compacted samples of silty clay soils that belong to loess formation in the center of Argentina. A finite-difference computer program was employed to simulate unsaturated transient flow. Advance of wetting front and seepage through natural and compacted soils have been simulated. Simulations results agree reasonably well with the data from laboratory tests. The present model has been used to simulate a silty clay liner behavior. Recommendations for liners landfills design located on regional little towns are formulated based on simulations obtained.
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