What are the tasks and categories of hydrological stations?

Hydrological stations for long-term continuous observation of the basic hydrological elements of rivers, lakes, channels, reservoirs and basins, which are established under unified planning for public welfare purposes, refer to the national basic hydrological stations.

The state implements classified management of hydrological stations. Hydrological stations are divided into national basic hydrological stations and special hydrological stations. National basic hydrological stations are divided into national important hydrological stations and general hydrological stations.