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挟沙力沿河宽分布的变化是造成游荡型河道主流频繁摆动的主要原因之一,掌握其变化规律是研究游荡型河流演变规律的关键.通过对游荡型河道成因及河道演变特性进行分析,结合黄河下游花园口-高村1954~1958年的水沙资料,考虑暴涨暴落的洪水和剧烈变化的地形条件对挟沙力分布的影响,建立了适用于黄河下游游荡型河道的二维挟沙力公式.通过实测资料检验,计算值与实测值符合良好,表明该公式可以较好地反映游荡型河道挟沙力沿河宽分布的特性.
The change of sediment-carrying sand along the river is one of the main reasons for the frequent swings of the mainstream of the wandering river, and to grasp its variation is the key to study the law of the evolution of the wandering river.Based on the analysis of the origin of the wandering river and the evolution characteristics of the river, Combined with the water and sediment data of Huayuankou - Gaocun 1954 ~ 1958 in the lower Yellow River, considering the impact of the rising and falling floods and drastic changes of topography on the distribution of sediment-carrying capacity, a two-dimensional sediment carrying capacity suitable for the wandering channel of the lower Yellow River The test results show that the calculated values are in good agreement with the measured values, which shows that the formula can well reflect the characteristics of the sediment-carrying capacity along the river.