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中文摘要：
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。
英文摘要：
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.
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