What's the difference between flood discharge and flood discharge?

The difference between flood discharge and flood discharge is different in definition and nature.

1, different definitions

Flood discharge refers to the measures to abandon the river bank and people's embankment on the beach when a serious flood occurs, so that the flood can flow smoothly between the levees on both sides. Flood discharge means that the reservoir exceeds a certain water level (limited water level in flood season) due to continuous heavy rainfall in the upper reaches. In order to avoid serious disasters caused by flood or dam break, the floodgate is opened to discharge water to the downstream river to ensure the safety of the reservoir dam.

2. Different in nature

Flood discharge area refers to the natural river channel and the area between its banks or embankments, which is used for flood discharge during a big flood. 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.

Flood discharge time

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, the natural river regime, topographic conditions and supporting water conservancy projects can not 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 cities downstream will 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.