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从实用的角度介绍了建立分洪区数字地形模型（DTM）方法，并给出了在分洪区信息可视化、分洪区特征曲线生成、分洪区二维洪水演进等方面的应用。
This paper introduces the method of establishing digital terrain model (DTM) for flood diversion from a practical point of view, and presents the application of information visualization in flood diversion area, the generation of characteristic curve of flood diversion area and the evolution of two-dimensional flood in flood diversion area.