NUMERICAL ANALYSIS ON FORMATION PROCESS OF DEPOSITIONAL LANDFORM OVER A PERMEABLE BED

Abstract

Numerical analysis of the flow, which is established under the effect of interaction between surface flow and subsurface flow, was conducted, together with the analysis of the bed evolution due to a sediment transport in this study. Basic equations of water flow are one-dimensional shallow water equation for surface flow, and two-dimensional Richards equation for subsurface flow. Numerical model was applied to simulate the formation process of depositional landform on one-dimensional permeable bed, which is just like a fl uvial fan.