When is the Yellow River Xiaolangdi drainage and sediment discharge?

Before the Yellow River flood season comes every year, the Xiaolangdi will be washed by water and sediment. Generally between June 20th and July 10. Turbid flow containing a lot of sediment is washed away from the sand discharge hole, and the storage capacity is reserved for flood control.

Water and sediment regulation is a complex scientific dispatching project, which is influenced by many factors, such as flood, weather and the overall water regime of the Yellow River. Time is uncertain, it may stop at any time, or it may continue to form a landscape. Water and sediment regulation is the most spectacular moment at Xiaolangdi. During the period of water and sediment regulation, yellow and white rapids spewed out of the cave.

If Huanglong rises, Qinglong falls from the sky and fights, setting off rows of huge waves and roaring straight at the lower reaches of the Yellow River. There is a big cross flow of the sea, and the most spectacular waterfall in the world will be inferior to it.

Extended data

meaning

Water and sediment regulation of the Yellow River refers to the timely transportation of sediment in the reservoir and riverbed into the sea by using engineering facilities and dispatching means under modern technical conditions through the impact of water flow, thus reducing the siltation in the reservoir area and riverbed and increasing the flood discharge capacity of the main channel.

The Yellow River Conservancy Committee of the Ministry of Water Resources (hereinafter referred to as the Yellow River Conservancy Committee) began to implement this strategy at the beginning of the new century, but the theory and strategy of "washing sand with water" has a long history. Just because of the productivity level at that time and other factors, this correct understanding is difficult to implement and can only be shelved.

It is difficult to control the Yellow River, and sand comes first. One of the biggest characteristics that distinguishes the Yellow River from other rivers is that there is more sand and less water, and the relationship between water and sediment is not harmonious. The average annual runoff of the Yellow River for many years is 58 billion cubic meters, but the sediment discharge is 65.438+600 million tons. It is the river with the most sediment in the world. As early as the pre-Qin period, the Yellow River was called "turbid river", and in the Han Dynasty there was even a saying that "one stone and six buckets of mud".

Baidu Encyclopedia-Regulation of Water and Sediment in the Yellow River