排除洪水to drain off floodwater

• 排洪抢险

  rush to drain off floodwater

• 下游河道不断升高，排洪能力逐年减退。

  The river channel downstream is constantly rising, and its ability to drain off floodwater is degrading each year.

• 扩大重点河段排洪能力。

  Expand the floodwater draining ability of key river sections.