What is the function of hydrological forecast?

Hydrological forecast refers to the qualitative or quantitative prediction of hydrological conditions of a certain water body, a certain area or a certain hydrological station in a certain period in the future according to the past or current hydrometeorological data. It is of great significance for flood control, drought resistance, rational utilization of water resources and national defense.

The technology and business of making scientific forecast and issuing forecast for future hydrological conditions. Hydrological forecasting is an important aspect of hydrology serving the economy and society, especially for disastrous hydrological phenomena and short-,medium-and long-term comprehensive utilization of large-scale water conservancy projects. The forecast services in China include flood level and discharge, low water level and discharge, sediment concentration, various ice conditions and water quality.