登陆台风对淮河流域降水影响特征分析

Characteristic analysis of the typhoon landing impact on precipitation in Huaihe River Basin

统计分析了1954—2018年影响淮河流域登陆台风的年际和季节变化、登陆地点、登陆后的移动路径特征及其影响淮河流域的降水特征。分析结果表明,平均每年约1.5个登陆台风影响淮河流域,主要集中在7—9月;登陆影响路径,以西行或西北行并从流域南侧经过的Ⅰ类和北行穿越流域的Ⅱ类居多,登陆地点以福建和浙江两省居多,分别占53%和29%;影响淮河流域的台风暴雨高发区与洪水高致灾区高度重叠,应重点关注;影响流域降水最大的前10位典型台风,均为Ⅱ类或Ⅰ类路径,且均在流域降水影响期间与北方冷空气结合。

The interannual variation and seasonal variation of landing typhoon,landing location,moving paths after landing and the precipitation characteristics affecting the Huaihe River Basin from 1954 to 2018 were analyzed.The results show that,averagely,1.5 landing typhoons affect the Huaihe River Basin every year,from July to September;The landing impact paths are mainly type I and type II,which travel westward or northwest along south side of river basin.The landing locations are mainly in Fujian Province and Zhejiang Province,accounting for 53%and 29%respectively.The high incidence area of typhoon and rainstorm affecting Huaihe River overlaps with the disaster area caused by flood,which should be paid more attention to.The top 10 typical typhoons with the largest impact on precipitation in the basin are type II or type I path,and they are all combined with the north cold air during the period of precipitation in the basin.