For better basin flood control planning and disaster prevention drafting, based on the flood routing characteristics and damage degree of dam break flood on economic property, a division method of disaster zones is put forward according to the disaster condition. In the combination of the national standard, the inundation zone of dam break flood is divided into 6 sub-zones, i. e, breaking zone, ruin zone, severe disaster zone, medium disaster zone, light disaster zone and safe zone. In the dis-aster zone division, the traditional element extension model is improved and the attribution of the disaster sub-zone is deter-mined by using the advantages of tight connection between variable weight element and evaluation order, which makes the disaster division more scientific, intuitive and effective.%为更好地进行流域防洪规划和制定防灾预案，根据溃坝洪水演进特征及其对经济财产的破坏作用，提出了一种基于淹没区受灾严重程度划分受灾区的评估方法。结合国家相关标准将溃坝洪水淹没范围划分为6种区域：溃决区、毁灭区、重灾区、中灾区、轻灾区和安全区。在受灾区的划分上，对传统物元可拓模型加以改进，利用变权物元与评价等级紧密联系的优势来确定受灾区的归属问题，使受灾区的划分更科学、直观、有效。
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