【作者】 张新华； 张祥伟； 雷孝章； 谢和平； 王江平；

【Author】 ZHANG Xin-hua~1 ZHANG Xiang-wei~2 LEI Xiao-zhang~1 XIE He-ping~3 WANG Jiang-ping~4 (1.State Key Lab.of Hydraulics & Mountain River Engin.,Sichuan Univ.,Chengdu 610065;2.Department of Planning and Program,Ministry of Water Resources of P.R.China,Beijing 100053;3.College of Water Resources & Hydropower,Sichuan University,Chengdu 610065;4.Guizhou Hongfu Company,Fuquan 550501.)

【机构】 四川大学水力学与山区河流开发保护国家重点实验室； 水利部规划计划司； 四川大学水电学院； 贵州宏福实业有限总公司；

【摘要】 水土流失除受降雨特性的强烈影响外,还受所处地域的地形地貌、土地利用情况、下垫面特征等影响,比较理想的研究方法应该将以上各种影响纳入同一体系进行系统研究．为此, 提出了将二维浅水波方程,二维不平衡输沙方程与地表高程受水沙影响变化的方程进行系统耦合,考虑到研究区域内下垫面条件、土地利用情况等复杂性,采用任意多边形网格的非构造有限体积法(FvM)对系统耦合模型进行数值离散,通过在四川省遂宁市水土保持试验站的实际应用,验证了该数值模型,结果表明：该模拟模型运行稳定、可靠、精度也能满足要求,能够模拟水土流失的时空分布规律．更多还原

【Abstract】 Water and soil losses are dominated by the conditions of regional geomorphologics, land-uses,and landcovers,in addtion to a strong influences of rainfall characteristics in the region. An ideal approach to deal with the problem of water and soil losses in the studies should be consider all of the conditons together.Therefore,an coupled 2D numercal model of water and sediments based on 2D shallow water equations,2D unballanced sedimental transportation,and land variation in elevations was proposed in this study.Considering the complexeties of regional land covers and land-uses,the coupled 2D numericla model was developed by an unstructured FVM method based on irregular polygonal mesh systems.Throughout its application in the experiment station of water and soil conservation in Suining Municipal of Sichuan Provinc,the 2D numerical model was validated.Results indicate that the model can be operated stably and that the results of simulation are reliable and accurate for the distributions of water and soil losses both in temporal and spatial domains.更多还原