Characteristic analysis of autumn floods and flood control regulation in the Weihe River
To ensure the safety of the Weihe River and promote the utilization of autumn flood waters,the characteristics of the autumn floods in the Weihe River and the effect of flood control operation of reservoirs in 2021 were analyzed and summarized.the analysis results show that The empirical frequency of the autumn flood with the annual maximum flood at Huaxian Station(1935-2022 series)occurring after the End of heat is 43.8％;The heavy continuous rain that causes autumn floods in Weihe River can be classified into three cate-gories:short-term,medium-term and long-term,and there are 6 types of 2 categories of the distribution of rainfall areas,which including quadrilateral,triangular,and diagonal types in oblique classes,and latitudinal north,medium,and southern types of latitudinal classes;The 2021 autumn flood at Huaxian Hydrometric Sta-tion in Weihe River in 2021 lasted for 836.5 hours and had the flood volume of 5.582 billion m3,which was only less than"64.9"and"03.8"floods;Fengjiashan reservoir and Heihe Jinpen reservoir reduced the flood peak by 40.2％to 94.2％and 28.3％to 44.9％respectively in 2021 autumn flood.In addition,based on the experience and enlightenment of autumn flood prevention,measures and suggestions such as making up or re-pairing the engineering,emphasizing the utilization of flood resources and improving river conditions are pro-posed.
autumn floodflood disastersreservoir regulationWeihe River
万方数据
维普
