1949～1998年中国大洪涝灾害若干特征分析

Research on Characteristics of Flood Disaster from 1949 to 1998 in China

根据1949～1998年大洪涝灾害资料、运用一般统计方法和分形理论，分析了1949～1998年大洪涝灾害的若干特征，得出大洪涝灾害的发生频率在不断增加、受灾农田面积波动上升、空间上以长江和珠江流域为主、季节上集中在6～8月份等特征，并探讨了大洪涝灾害时间序列上的分形特征。

Based on statistical method, fraetal theory and correlative data of flood disasters from 1949 to 1998 in China, this paper analyzes the characteristics of flood disaster and gets some conclusions that the frequency of flood disaster and its affected areas are increasing. Spatially, Yangzi River and Zhujiang River are dominant. Seasonally, June to August is the flood season. The paper also discusses the fraetal characteristics of flood disaster temporally.