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中文摘要：
对含有多个沙洲的天然河道，由于河道分汉，不便采用一维或平面二维模型计算洪水演进过程。通过把这种类型的河流看作小型河网，采用一维河网水流数学模型来进行模拟。将这种模型应用于东荆河洪水演进计算，率定后，模型验证的计算结果和实测资料基本一致，效果良好，将其应用于东荆河洪水调度具有积极的指导作用。
英文摘要：
For natural water course with multi-sandbank,it＇s inconvenient to simulate flood routing when adopting 1D or horizontal 2D flow model, because of the multi-branches of river. In this paper,this kind of river is regarded as a small river networks and the 1D river networks flow modal is used to carry out simulation. Finally,this modal is applied to simulate flood routing in Dongjing River,and the results show that computational outcome basically accords with field data,which is satisfied and plays an active role in flood control planning of modem water enterprise.
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