2011年伊洛河秋汛洪水特性分析

Characteristic Analysis on Autumn Floods of 2011 in Yiluo River

对2011年伊洛河秋汛的洪水特性进行了分析,结果表明:①此次秋汛降水强度大,降水时段多,持续时间长;②此次洪水径流系数较大;③洪水峰高量大,历时较长,下游洪水坦化变形严重,削峰率大,洪水水位比2003年、2010年的洪水水位低。

This paper analyzed the characteristics of the 2011 autumn floods in Yiluo River. The results show that： ①this autumn rain is of high in- tensity, multi-period and long duration; ②the rainfall-runoff coefficient of this rain is higher; ③the floods of hydrological stations in Yiluo River have the common features of high peaks, large water volume and long duration. The downstream floods are flattened and deformed seriously and a large flat-topping rate and the flood water level is lower than that of 2003 and 2010.