Sensitivity Analysis and Validation for Numerical Simulation of Water Infiltration into Unsaturated Soil

Figure 3

The cumulative effect of input parameters, on the absolute residual error at simulation time 10⁵ s. Note: (initial cond.) (step 2), clay medium initial value of volumetric water content; (step 3), residual volumetric water content; (step 4), (step 5), (step 7), and (step 8) are fitting parameters; (step 6), saturated hydraulic conductivity; (step 9), time-step size; and (step 10), spatial spacing size.