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The soil-water characteristic curve generally has two primary defining points; namely: 1.) the water content and suction at the air entry value for the soil, and 2.) the water content and soil suction at residual conditions. There are also two additional points that define the extreme limits on the SWCC; namely, completely saturated conditions under zero suction (i.e., saturated water content and porosity), and completely dry conditions (i.e., zero water content and a soil suction of 1,000,000 kPa).
Is it possible to generate data points along the entire range of the SWCC if I have an estimate of the air entry value and residual conditions for a soil?
Computer modeling of a physical process in an unsaturated soil (e.g., seepage) requires that one or more unsaturated soil property functions for each soil strata. There are numerous procedures to arrive at the unsaturated soil properties. Virtually in every situation requires an initial assessment of a representative soil-water characteristic curve, SWCC, for each soil strata.
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