A Study on Mathematical Model for Sediment Yield in Mountain Regions with Large Hillside Slopes

by Duo Fang, Chengdu Univ of Science and, Technology, Chengdu, China,
Guoliang Yu, Chengdu Univ of Science and, Technology, Chengdu, China,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

Based on the characteristics of water and soil loss in mountain region with large hillside slopes in southwest of China, the equations of runoff formation and sediment yield are obtained. In a wet area, when precipitation intensity is large enough, runoff can be formed even before soil moisture being less than soil absorption capacity. The sediment discharge and the soil erosion rate per unit area can be presented as the similar form of Meyer-Peter equation. The incipient shear stress should include the parameter of soil cohesion. The watershed model based on these characteristics is used in a small basin, and a satisfactory result has been obtained.

Subject Headings: Slopes | Sediment | Soil water | Shear stress | Runoff | Mountains | Mathematical models | China | Asia

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