湘江湘潭-濠河口河段河道演变特点分析

Study of fluvial processes in Xiangtan-Haohekou Section of Xiangjiang River

针对近年来湘江下游枯水期水位过低,洪水期水位较高,下游人为因素不断影响湘江河道的通航条件,本文从不同方面综合分析了湘潭-濠河口河段河床冲淤演变的特点。通过同流量水位变化分析各河段冲淤变化,研究表明湘江总体具有大水淤积、小水冲刷的特点;依据河段中江心洲冲淤变化,得到湘潭-濠河口河段冲淤变化特点,进一步指出不同河段冲刷淤积的原因。

The navigation capacity of the Xiangjiang River has been affected seriously by the low water level during dry seasons, high water level during flood seasons and human activities. In this study, the characteris tics of fluvial processes in the Xiangtan Haohekou section of the Xiangjiang River are analyzed from different aspects. The variation of scouring and deposition in the channel are explored at different discharges and sedi ment conditions using the method of waterlevelchangeatsamedischarge. The results indicate that there is silting during flood periods and scouring in nonflood seasons. Based on the scouring and silting of the sand bars, the features of fluvial processes in the XiangtanHaohekou section are obtained. Furthermore, the rea sons for the scouring and silting are also given in the end of this paper.