NAME =  Mr. Chai Huaquan  
ORGANIZATION =  Bengbu meteorological Office, China  
ADDRESS =  Er Gang road, Bengbu, 233000, Anhui Province, P.R.China  
COUNTRY =  P. R. China  
PHONE =  +86-552-3037687  
E-MAIL =  Chq58221@sohu.com  
POSTER_ONLY =  no  
THEME =  T7  
DATE =  30-Jul-04-19:58:24  
ABSID = T7MCH30Jul04195824 
TITLE = An  Analysis  of  Synoptic  System  and  Flood  of  Flood-Causing Torrential  Rain  in the Huaihe  River  Basin  in  1954, 1991  and  2003 
AUTHOR_1 = Chai Huaquan 
INSTITUTION_1 = Bengbu Meterological Office, Anhui Province 
PRESENTER = AUTHOR_1 
AUTHOR_2 = Cheng Xingwu 
INSTITUTION_2 = Hydrological Bureau of Huaihe River Comission, China 
AUTHOR_3 = Zhang Xiaohong 
INSTITUTION_3 = Bengbu Meterological Office, Anhui Province 
AUTHOR_4 = Xu Hui 
INSTITUTION_4 = Hydrological Bureau of Huaihe River Comission, China 
AUTHOR_5 = Qian Mingkai 
INSTITUTION_5 = Hydrological Bureau of Huaihe River Comission, China 
AUTHOR_6 = Liang Shuxian 
INSTITUTION_6 = Hydrological Bureau of Huaihe River Comission, China 
ABSTRACT =   Based on meteorological and hydrological data, the temporal and spatial distribution of the rainfall during the flood period in the years of 1954,1991 and 2003 over Huaihe River basin was analyzed, flood-causing torrential rain process and meteorological cause were studied as well. The results show that the length of Meiyu (plum rain) period is closely related with the position of the ridge line of the subtropical high(along 120oE) and stability blocking high formed in the middle and supper latitude over Eurasia. The heavy rain during Meiyu period results from the combination of multi-weather systems. It was also found that the flood over the Huaihe River basin was mainly caused by the storm of the long period, high intensity and large area. The flood over Huaihe River basin in 2003, the largest one since 1954, resulted from the concentrated and frequent storms, the discharge through the Hongzehu outlets was the largest one for the past 50 years and the discharges through Wangjiaba, Runheji, Lutaizi, Bengbu and Sanhe Gate were larger than those in 1954 and 1991.