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中文摘要：
随着分洪区内人口、经济的增长，建设项目的增多，分洪区的地形情况变得复杂，这给分洪区分洪后的洪水演进模拟带来了困难。针对分洪区内存在相互交错线状建筑物的情况进行研究，考虑了分洪区内普通区域与线状物区域的水流交换，对已有的二维水流数学模型进行拓展，建立了相应的数学模型。最后通过对两个概化地形区域进行计算，证明了新模型的合理性。
英文摘要：
As the population grows and the economy develops in flood detention areas, the landform in flood detention areas becomes complicated, which brings difficulties in simulating the flood flow in flood detention areas. Function of the 2-D flow numerical model is extended to simulate flood flow in flood detention areas existing inter-crossing line-type structures, like canals and roads. Exchanges of flow between the land surface and line-type structures are considered. Finally, two cases are given and the numerical results show that the new model can simulate the flows reasonably in the flood detention areas existing inter-crossing line-type structures.
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