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。
The law of sediment carrying capacity transverse distribution in braided river, which is the one of the key factors to research on the evolution rule of braided river, is presented.
模型不仅能模拟出河道的垂向冲淤过程，而且还可模拟出由河岸坍塌所引起的河道横向摆动过程。
The 3D model can not only simulate the longitudinal bed deformation, but also calculate the lateral migration in alluvial rivers.
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