EVALUATION OF INFILTRATION MODELS IN KINEMATIC WAVE APPROXIMATION TO FORESTED WATERSHED OVERLAND FLOW.
The paper reports on a study to assess the relative accuracy with which deterministic urban hydrologic simulation models could be applied to predict the surface outflow hydrographs from forested watersheds, and to evaluate the dependency of the kinematic wave approximation to overland flow on the type of infiltration model used. Since these watersheds are essentially pervious, the technique used to estimate infiltration rates becomes critically important and deserves detailed analysis. Horton's classical exponential decay infiltration equation as a function of time results in a reduction in infiltration capacity even if rainfall intensities are very light. Thus, an integrated form of Horton's equation was evaluated to correct such a problem. Results are compared with the Soil Conservation Service curve number method.
