淮河流域极端旱涝特征分析

Analysis on characteristics of extreme drought andflood events in Huaihe River Basin

摘要: 利用淮河流域历史水文气象、水旱灾害受灾成灾等系列资料,分析了极端旱涝的暴雨、洪水、洪灾和干旱灾害特征,以及天气成因,揭示了交替随机发生极端旱涝的基本规律.结果表明,1470-2010年淮河流域发生的极端旱涝分别为46和63次,平均5a发生1次极端早涝；梅雨期降水量的极端偏多(或偏少)是形成极端洪涝(或干旱)最直接的因素；中高纬度西风环流和副高的季节性异常是发生极端洪涝(或干旱)的根本原因.

Abstract: The rainstorm,flood and disaster characteristics and weather process of extreme drought and flood events in Huaihe River Basin were analyzed using historical hydrological and meteorological data and serial information of flood and drought disasters,and the general law was concluded that extreme drought and flood events occurred randomly and alternately in the area.The analysis showed that the frequency of drought and flood events in the Huaihe River Basin during 1470-2010 was propinquant,46 times and 63 tim...