Secondly, different changes in river programs, it's outside of river bend shows erosion status in different flood frequencies. And the localscour depth is different with different bend radius.
不同改河方案在不同洪水频率下河流弯道外侧呈现出冲刷状态，而内侧则呈现淤积状态，并且弯道半径不同，局部冲刷深度也不同；
The scour of subgrade along river side is a main type of the highway washout of flood, the maximum scour depth would effect the subgrade safety directly.
沿河公路路基冲刷是公路水毁中的一个主要类型，而最大冲刷深度将直接影响沿河路基的安全。
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