flood plain discharge

例句：

1. 1. The river's floodplain discharge is a significant source of pollution.
   这条河的洪水平原排放是一个重要的污染源。
2. 2.The city has implemented measures to reduce its floodplain discharge and improve water quality.
   该城市已经采取措施减少洪水平原排放并改善水质。
3. 3.The study found that reducing the floodplain discharge could significantly reduce the risk of flooding in the region.
   研究发现，减少洪水平原排放可以显著降低该地区洪水的风险。