The Yellow River is famous for its rich sediment. In ancient books, it is often described as "one stone in the river, six buckets of mud" and "the Yellow River is fighting for water, and mud ranks seventh". The average sediment transport in the lower reaches of the Yellow River for many years is 65.438+0.6 billion tons, and the average sediment concentration is about 35 kilograms per cubic meter. The high sediment concentration of the Yellow River is unique among the rivers in the world. If the sediment is 654.38+600 million tons, its length is twice that of the earth to distance to the moon, and it can circle the equator 20 times. The saying that "jumping into the Yellow River can't be washed clearly" also comes from describing the excessive sediment in the Yellow River. The lower reaches of the Yellow River meander in the North China Plain, with a wide and flat riverbed, slow water flow and large sediment deposition, which makes the riverbed 4-5 meters higher than the ground on both banks, making it a world-famous "river on the ground". Every flood season, both sides of the Yellow River are threatened by floods. For a long time, people have used embankment to suppress floods, resulting in an increasing height difference between the riverbed and the ground on both banks. Historically, the lower reaches of the Yellow River have burst many times, which has brought heavy disasters to the people in the North China Plain. Since the founding of People's Republic of China (PRC), the Yellow River has been comprehensively managed. On the one hand, vigorously carry out soil and water conservation in the middle and upper reaches, especially in the Loess Plateau, control soil erosion and reduce sediment transport. On the other hand, building dams in the lower reaches and strengthening the Yellow River dikes have played a great role in ensuring the safety of people's lives and property on both sides of the lower reaches of the Yellow River.
So, the answer is: The Yellow River is famous for its rich sediment. The saying that "jumping into the Yellow River can't be washed clearly" also comes from describing the excessive sediment in the Yellow River. The lower reaches of the Yellow River meander in the North China Plain, with wide and flat riverbed, slow water flow and large sediment deposition, which makes the riverbed 4-5 meters higher than the ground on both sides of the river and becomes a world-famous "river on the ground". A large amount of sediment deposition makes the riverbed in the lower reaches of the Yellow River rise continuously, and the areas on both sides of the river are threatened by floods every flood season.
For a long time, people have used embankment to suppress floods, resulting in an increasing height difference between the riverbed and the ground on both banks. Historically, the lower reaches of the Yellow River have burst its banks many times, which has brought heavy disasters to the people in the North China Plain. Since the founding of People's Republic of China (PRC), the Yellow River has been comprehensively managed. On the one hand, vigorously carry out soil and water conservation in the middle and upper reaches, especially in the Loess Plateau, control soil erosion and reduce sediment transport. On the other hand, building dams in the lower reaches and strengthening the Yellow River dikes have played a great role in ensuring the safety of people's lives and property on both sides of the lower reaches of the Yellow River.