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《Water Resources and Power》 2012-02
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Characteristics of Water Vapor Transportation in Huaihe River Basin in Drought and Flood Years

HUO Bei1,LU Guihua2,HE Hai2(1.College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China;2.Water Problem Institute,Hohai University,Nanjing 210098,China)  
Based on the NCEP/NCAR(National Centers for Environmental Prediction/National Centers for Atmospheric Research) daily reanalysis data in June~August from 1951 to 2007,the vapor transportation flux and divergence are calculated when drought and flood occurred in Huaihe River Basin in summer.And then the abnormal characteristics of water vapor transportation between flood/drought years and normal years are analyzed.The results show that the distribution of vapor transportation flux and divergence in flood years is opposite in drought years;precipitation is abundant in Huaihe River Basin in flood years could be ascribed to an increase of vapor current from southwest and the whole layer vapor convergence,while a decrease of the vapor flux transporting to the north;however,in dry years,large scales of abnormal vapor transports to the north and the southwest vapor current as well as the whole layer vapor convergence become weaker,which contribute to the decrease of precipitation over the Huaihe River Basin.
【Fund】: 水利部公益性行业科研专项经费基金资助项目(200701039 200901042);; 中央高校基本科研业务费专项资金资助项目(2009B06114)
【CateGory Index】: P426
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