广西境内西江干流洪水特征变化初探

Characteristics of Floods on Main Stream of Xijiang River in Guangxi

本文重点从降雨、年最高水位、最大流量及区间洪水组合情况等初步分析了西江干流桂平至梧州河段洪水特征变化及成因。指出西江干流桂平至梧州河段较大洪水发生频次增加明显,其原因主要有区间蒙江、桂江较大洪水发生频次增加明显,洪水遭遇组合机遇增大及洪水归槽影响等。

analyzed frequency frequency According to the precipitation, annual maximum water level, and changes of annual maximum discharge, this paper flood characteristics and reasons in the Guiping-Wuzhou reach of the Xijiang River. It is concluded that occurrence of the large floods significantly increased in the reach, which was mainly caused by significant increase in big flood of Mengjiang and Guijiang, higher opportunities of combined flood, and flood convergence in channel.