下荆江河道水力几何形态的研究

Study on the Hydraulic Geometry of Low Jingjiang River Stream hannels

根据 195 0— 1980年下荆江监利 (姚圻脑 )站的水文测验资料 ,运用L B Leopld河床水力几何形态原理 ,建立下荆江河道的河相关系式 ,研究该河道水力几何形态的特点及变化 .研究表明 ,下荆江河道河宽指数b随流量的变化较小 ,而水深指数f随流量的变化较大 。

Based on the hydrologic data from TianLi(Yaoqinao) Hydrologic Station, Low Jingjiang River from 1950 to 1980, the formula of hydraulic geometry in the section of Low Jingjiang stream channels are constructed according to L.B.Leopolds principle on hydraulic geometry of stream channels. In addition, the characteristics and changes of hydraulic geometry of stream channels are also studied. As a result, the stream channel width exponent b of low Jingjiang River changes little with the discharge, whereas the depth exponent f changes greatly with the discharge. Moreover, the cross section of Low Jingjiang River is getting narrow and deep.