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《Hydro-Science and Engineering》 2011-04
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Analysis on characteristics of extreme drought andflood events in Huaihe River Basin

WU Yong-xiang1,2,YAO Hui-ming2,WANG Gao-xu2,SHEN Guo-chang2,SHI Rui2,HOU Bao-deng2(1.College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China;2.Nanjing Hydraulic Research Institute,State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing 210029,China)  
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 times respectively,and averagely the extreme event occurred every 5 years.It was proposed that the most direct factor causing extreme flood or drought events was excessive increase or decrease of precipitation in Meiyu period,and the root cause was the seasonal anomalies of westerly circulation and subtropical high pressure in medium and high latitude.
【Fund】: 水利部公益性行业科研专项(200701005 200801027);水利部科技推广计划项目(TG0921)
【CateGory Index】: P426.616
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