Should there be a question like "what is Yellow River"? You may promptly reply, "who doesn' t know the Yellow River, if he or she is a descendant of Chinese nationality?" There could be no more than but one simple answer: "The Yellow River is a river which runs through on the land of China."
Yet, people of different background may give different explanations and understandings.
Historians may tell you that human was born with the mixture of water and soil from the Yellow River. For this reason, the Yellow River is not only a physical river running through the Loess Plateau of northern China,but a "mother river" which nurtures hundreds of millions of descendants of the ancestry of the Chinese nationality and in essence a great mother who creates the spirit of the Chinese nation.
Geologists may argue that it is the ocean that gives birth to mountains and mountains give birth to the Yellow River. The roaring current of the Yellow River is an evolution from inland lakes that originates from the faults of the Erdos Mountain. As early as 1.5 million years ago, numerous lakes and rivers and streams that flowed into these ancient lakes which gradually merged and linked with each other as a result of strong pressing, lifting and depression of the crust of the earth, a great river was hence formed and eventually found its course leading to the far end of the earth and emptying itself into the sea.
The analysis based on 145 floods during 1950~ 1960 and 1969-1985 in natural conditions shows that, when other factors remain unchanged, the sedimentation in downstream channel will be reduced by 51 million tons if the sediment transport from Hekou township to Longmen is reduced by 100 million tons; the downstream channel sedimentation will be reduced by 39 million tons if the sediment transport from Longmen to Tongguan is reduced by 100 million tons; the downstream channel sedimentation will be reduced by 82 million tons if the water volume above Hekou township increas
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