Widen and deepen the channel for expanding floodplain and increasing flood capacity for flood control.

为雨洪控制扩宽加深河道，以扩大泛滥区和增加行洪能力。

youdao

Widen and deepen the channel for expanding floodplain and increasing flood capacity for flood control.

为雨洪控制扩宽加深河道，以扩大泛滥区和增加行洪能力。

youdao