因为天然河道形状复杂，故而在近似化为宽浅人工渠道并用曼宁公式处理时不可避免地会带来模型误差。

Because the situation of an actual river is so complex (not as artificially channels) that using Manning's equation will lead to error inevitably.

youdao

因为天然河道形状复杂，故而在近似化为宽浅人工渠道并用曼宁公式处理时不可避免地会带来模型误差。

Because the situation of an actual river is so complex (not as artificially channels) that using Manning's equation will lead to error inevitably.

youdao