What is a flood discharge area?

Flood discharge area means that when the water level of rivers and lakes rises to the flood warning line, the gap is manually opened to drain the flood to the designated area to reduce the harm to the surrounding waters.

It is really helpless to introduce the flood into the flood discharge area where tens of thousands or even hundreds of thousands of people live by flood discharge to alleviate the pressure of the flood in the main stream of the river. If there is a better way, of course, you can not do it.

For rivers such as the Yangtze River and Huaihe River, which account for a very high proportion of runoff in summer, their natural river conditions and supporting water conservancy projects cannot achieve the purpose of adjusting water quantity at will, especially in the case of long-term heavy precipitation, the carrying capacity of rivers will be seriously threatened. If decisive measures are not taken to raise the water level, once the dam breaks, not only these low-lying flood storage areas will suffer losses, but also more cities and more people downstream may suffer.

Therefore, the timing of flood discharge, the amount of flood discharge, the prediction of submerged area, the interest game between upstream and downstream and so on. They are all important factors to be considered when formulating and implementing flood discharge schemes.

Operation characteristics of flood discharge area

The flood discharge area is different from the Three Gorges Project and the South-to-North Water Transfer Project. Although the flood problem caused by it is unpredictable under meteorological conditions, it is temporary and controllable in operation as a whole. There is no need to implement large-scale resettlement projects in terms of time, agricultural production and people's will, because fertile land and resources cannot be abandoned.

What needs to be done in the future is to continue to strengthen ecological protection and construction from the perspective of the whole system and the whole basin on the basis of scientific implementation of more favorable water conservancy projects, continuously improve the capacity of soil and water conservation and water conservation, effectively reduce agricultural non-point source pollution, make water "live", "move" and "smooth", do our best to improve the storage capacity of water resources, and finally achieve the goal of effectively resisting heavy rainfall.

Refer to Baidu Encyclopedia-Flood Discharge Area for the above contents.