Numerical Simulation of the Hydrodynamics of Overland Flow with Spatial Variationin Its Physical Characteristics

摘要

The research will develop a two-dimensional, hydrodynamic and numerical model foroverland flow. The model explicitly incorporates realistic spatial variations in physical characteristics of hillslopes. Based on the detail simulation results of the model, the impacts of the spatial variations of hillslope properties on the characteristics of overland flow is examined, and the implications of the spatial variability of the overland flow on soil erosion are also discussed. Through quantitative analysis of the relationships between the characteristics of overland flow and spatial variations of hillslope characterstics, the study will provide a fundamental and realistic framework necessary for the prediction of surface runoff and soil erosion on spatially varied hillslopes.