Simulation Experimental Study on Hydrodynamics Process of Erosion and Sediment by Runoff in Grassland

• 作者: XING En-de CUI Wei LIU Yan-ping LI Jin-rong
• 来源期刊: 气象与环境研究：英文版
• 学科: 农学
• 关键词: 模拟实验 动力过程 径流侵蚀 土壤侵蚀过程 径流冲刷试验 平均流速 泥沙 草地
• 年，卷（期）: 2012,（9）
• 页码范围: 66-68
• 页数: 3页
• 分类号: S157.1

摘要

[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 mean flow velocity of change slope increased with the discharge of flow and slope gradient.The mean silt content rate,the mean sediment transport rate and the mean 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 mean sediment transport rate and the mean sheer stress was linear.[Conclusion]The study provided theoretic basis for the report of soil erosion in grassland in China.