摘要
针对流域水沙模拟问题,在可变下渗能力(VIC)模型的产流单元和河道汇流中分别耦合物理概念的产沙和汇沙结构,构建了能够模拟水沙时空变化的分布式水沙耦合模型,并应用于黄土高原岔巴沟流域1987~2006年10场洪水的模拟和验证。结果表明,水沙耦合模型具有较好的精度,对流域输沙量模拟的平均绝对值误差为22.2%,对输沙率过程模拟的确定性系数达到0.61,同时耦合模型能够模拟流域产沙汇沙的空间分布特征,具有较大的应用潜力。
To solve flow-sediment simulation problem,this study improved variable infiltration capacity(VIC)model.We coupled conceptual sediment yield module into runoff unit.In addition,sediment confluence module was coupled into channel confluence.It constructed a distributed model of coupled flow and sediment to simulate the spatio-temporal variation of flow-sediment.Ten floods in Chabagou basin from 1987 to 2006 was simulated using the model.The average absolute error of sediment discharge is 22.2%,the certainty coefficient of sediment transport rate is 0.61,and the simulation results verified the high precision of the proposed model.The model simulation can show the spatial distribution characteristics of sediment yield-confluence,which has good application potential.
作者
孙昭敏
吴志勇
何海
徐征光
张宇亮
倪用鑫
SUN Zhao-min;WU Zhi-yong;HE Hai;XU Zheng-guang;ZHANG Yu-liang;NI Yong-xin(College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China;Yellow River Institute of Hydraulic Research,Yellow River Conservancy Commission,Zhengzhou 450003,China)
出处
《水电能源科学》
北大核心
2020年第3期30-33,97,共5页
Water Resources and Power
基金
国家自然科学基金项目(51779071,51579065)
中央高校基本科研业务费专项(2019B10214)
中央级公益性科研院所基本科研业务费专项(HKY-JBYW-2017-12)。
关键词
VIC模型
水沙耦合模拟
岔巴沟流域
水沙时空分布
VIC model
coupled flow-sediment simulation
Chabagou basin
spatio-temporal distribution of flowsediment
