黄河下游游荡型河段挟沙力、阻力沿河宽分布的研究

对游荡型河流挟沙力、阻力沿河宽分布情况进行了研究。研究发现河道断面形态变幅较大是影响现 有二维挟沙力研究方法应用到游荡型河流中的主要原因;阻力沿河宽分布除河道断面形态影响之外,滩槽水 流差异也是不可忽略的。因此,引入反映河流断面形态变幅以及滩槽差异的因子,结合黄河水沙资料对现有 公式进行修正,得到适用于黄河下游游荡型河段的二维挟沙力、阻力公式。

Research on Sediment Carrying Capacity and Resistance Distribution Along River Width in Huanghe Wandering River

To know the situation of sediment carrying capacity and resistance distribution along river width is the key point of the wandering river simulation. Study on sediment carrying capacity distribution along river width, and find that the large change of the section shape are the main reason that restrict the existing method of 2-D sediment carrying capacity applied to wandering river. Including influence of the section shape, the different water condition between floodplain and channel is another import factor that influents the resistance distribution along river width. Therefore, this paper uses some parameters that reflect the large change of section shape and the difference between floodplain and channel, amends the existing formula using the water and sediment data of Huanghe river, then gets the formula of sediment carrying capacity and resistance distribution along river width in Huanghe wandering river.