淮河流域干旱灾害空间格局重构

Reconstruction of Spatial Pattern of Drought Disasters in Huaihe River Basin

基于历史文献记载,对1200年以来淮河流域的干旱灾害进行了统计与分析,重构并分析了淮河流域干旱灾害空间格局特征.结果表明:(1)淮河流域旱灾易发地由1200年至1948年的东部与南部地区转变成,1949年至2014年的中部与北部地区;(2)1200年至1948年除淮河下游地区旱灾易发等级较低外,其他地区易发等级较高,而1949年至2014年淮河流域整体干旱易发等级较小.

The drought disasters in the Huaihe River basin since 1200 were exacted from Chinese historical documents.Using these records,the frequency of drought was analyzed by using the statistical methods.The spatial pattern of drought disasters was then reconstructed and analyzed.The main results showed that：（1）The areas prone to drought disasters had switched from the eastern and southern Huaihe River basin during 1200-1948 to the central and northern regions over 1949-2014.（2）The drought grade was relatively higher during1200-1948 except for the lower reaches of Huaihe River.However,over the period of 1949-2014,the total drought grade was relatively lower for Huaihe River Basin.