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选取频遭洪涝灾害威胁与危害的沿海平原低地，试图建立描述洪涝强度的等级测度模式，并分析其减灾意义。
This paper tries to establish a hierarchical measure model to describe the intensity of floods and to analyze the significance of disaster reduction by selecting the lowland of the coastal plain where the floods are threatened and endangered.