A drainage basin is the area where these tributaries collect rainwater. A river with all its tributaries is called a river system.
流域是支流蓄水的区域。一条河流连同它的全部支流一起,叫做水系。
2
Some problems of the city drainage engineering construction are discussed from the urban drain system planning for the new district in the west of Qinhuai River in Nanjing.
由南京河西新城区水系规划反思以往城市排水工程建设中存在的问题。
3
Jian Song demanded perfecting legal system establishment in the Huai Riverdrainage area, and strengthening the degree of environmental protection law enforcement.