watershed management

例句：

1. 1. Watershed management is essential for maintaining the ecological balance of a region.
   流域管理对于维护一个地区的生态平衡至关重要。
2. 2.The government has implemented a new watershed management policy to reduce pollution in the city.
   政府实施了一项新的水文区管理政策，以减少城市中的污染。
3. 3.The watershed management plan aims to protect the natural resources and promote sustainable development.
   水文区管理计划旨在保护自然资源并促进可持续发展。