长江福山倒套二维水沙数值模拟  

Two-dimensional sediment-flow numerical simulation in Fushan watercourse of the Yangtze River

作　　者：吴挺峰[1,2] 胡艳[3] 崔广柏[2] 

机构地区：[1]中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,江苏南京210008 [2]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [3]太湖流域管理局,上海200434

出　　处：《泥沙研究》2009年第2期46-52,共7页Journal of Sediment Research

基　　金：国家自然科学基金重点项目:太湖富营养化控制机理研究(50239030)

摘　　要：由对历年实测地形资料分析发现,福山倒套目前正处于淤积阶段,其水沙状况主要受控于上部串沟及下部串沟来水来沙。借助EFDC模型中的水动力及泥沙模块,对倒套水沙状况进行数值模拟实验,结果表明:(1)倒套内部水位降低,但变化不明显;(2)倒套内部流场流速整体下降,尤其是倒套口门处流速值减小较大;(3)倒套淤积加速,但倒套口门段较为稳定。因此,适时疏浚上部串沟是维持倒套稳定之关键。According to the analysis of the surveyed terrain data in Fushan watercourse,it was found that Fushan watercourse was in the state of siltation.The flow and sediment condition in Fushan watercourse was controlled by sediment and discharge conditions from the up-ditch and down-ditch.In this paper,EFDC model was used to simulate the flow movement and sediment transport in the Fushan watercourse.The results showed that the water level decreased slightly,the entire flow velocity in Fushan watercourse was reduced and the most reduction value appeared at the mouth section of Fushan watercourse,and although the siltation accelerated,the mouth section of Fushan watercourse was stable.Therefore,dredging in the up-ditch will be an important measurement to keep the stability of Fushan watercourse.

关 键 词：河床演变 福山倒套 EFDC模型 淤积 

分 类 号：TV147[水利工程—水力学及河流动力学]