Hillslope soil erosion and runoff model for natural rainfall events

作     者：Zhanyu Zhang Guohua Zhang Changqing Zuo Xiaoyu Pi 

作者机构：Agricultural Engineering College Hohai UniversityNanjing 210098 China Soil and Water Conservation Research Institute of JiangxiProvince Nanchang 330000 China The Water Service Bureau of Chaoyang of Beijing CityBeijing 100026 China 

出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)

年 卷 期：2008年第24卷第3期

页      面：277-283页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0802[工学-机械工程] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：The project supported by the National Natural Science Foundation of China(50309003) 

主　　题：Overland flow Raindrop splash Runoff Erosion process Numerical simulation 

摘      要：By using the momentum theorem and waterbalance principle, basic equations of slope runoff were derived, soil erosion by raindrop splash and runoff were discussed and a model was established for decribing hillslope soil erosion processes. The numerical solution of the model was obtained by adopting the Preissmann format and considering the common solution-determining conditions, from which not only the runoff and soil erosion but also their processes can be described. The model was validated by ten groups of observation data of Soil Conservation Ecological Science and Technology Demonstration Park of Jiangxi Province. Comparisons show that the maximum relative error between simulation and experimental data is about 10.98% for total runoff and 15 % for total erosion, 5.2% for runoffprocess and 6.1% for erosion process, indicating that the model is conceptually realistic and reliable and offers a feasible approach for further studies on the soil erosion process.