Simulation Experimental Study on Hydrodynamics Process of Erosion and Sediment by Runoff on Grassland
[Objective] The aim was to study the simulation test of hydrodynamics process of erosion. [Method] Through the runoff scouring experiment , the property of soil erosion in Damaoqi grassland in Inner Mongolia was studied. The process and mechanism of soil erosion were studied. [ Result] The results of runoff scouring experiment on inner Damaoqi steppe showed that the average flow velocity of change slope increased with the discharge of flow and slope gradient. The average silt content rate, the average sediment transport rate and the average sheer stress all increased when the discharge of flow increased, which changed in parabolic form with the increase of slope gradient and the critical gradient is 25°. The relationship between the average sediment transport rate and the average sheer stress is linear. [Conclusion] The study provided theoretic basis for the report of soil erosion in grassland in China.
国家科技期刊平台
NSTL
万方数据
维普
