论文部分内容阅读
依据中国省级报刊灾害(1949年～1990年)记录,以县域为统计单元,建立了中国自然灾害数据库。在此基础上,对中国自然灾害多度、频次与综合灾害指数等特征值进行计算与制图,从而对其时空分异加以分析,得出近十几年来灾情明显增长与高风险区开发力度加大有直接关系的认识,并再次证明中国自然灾害东西分异高于南北分异,为中国自然灾害区划提出了新的依据。
According to the records of China’s provincial-level newspapers and periodicals (1949-1990), the China Natural Disaster Database was established using the county as the statistical unit. Based on this, the eigenvalues of China’s natural disasters such as multi-degree, frequency and comprehensive disaster index are calculated and plotted, and the spatial and temporal differentiation of the natural disasters is analyzed. It shows that the disasters have been obviously increased and the development of high-risk areas increased It has proved once again that the differentiation of natural disasters in China is higher than that of the north and south and provides a new basis for the division of China’s natural disasters.