Xiàshuǐdào de páishuǐliàng zài bàoyǔ shí yánzhòng bùzú.
The drainage capacity of the sewers is seriously inadequate during storms.
Tips
usage
Two senses: (1) naval — the weight of water a ship displaces, used to size warships; (2) hydraulic engineering — the volume of water a pipe or channel can discharge per unit time. Context tells you which.