Environmental problems of the Yellow River Basin and comprehensive management measures?

Environmental problems: the upper reaches of the Yellow River tend to be arid, grassland degradation, desertification is serious; the middle reaches of the Yellow River flow through the Loess Plateau, with more tributaries, the Loess Plateau soil layer is loose, the destruction of vegetation is serious, in the event of a rainstorm, a large amount of sand and rainwater together with the Yellow River, resulting in the increase of the sand content; downstream of the plains, the river becomes wider, slopes become slower, the river slowed down the speed of the flow of the river, the carry of the sand deposition, so that the riverbed gradually raised, becoming "above ground river". The riverbed was gradually raised and became a "river on the ground". As the riverbed continued to rise, people were forced to build embankments to contain the water. During the rainy season, the riverbanks are in danger of bursting at any time. The river has formed a floodplain of 250,000 square kilometers.

Comprehensive management measures: the upper reaches of the reservoir; the middle reaches of the Loess Plateau region to carry out comprehensive soil and water conservation management; the lower reaches of the Yellow River embankment reinforcement.