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Correcting the Wandering Section of the Lower Yellow River by Catching Opportune Time

Hu Yisan (Yellow River Conservancy Commission. Zhengzhou, 450003)  
The wandering section of the lower Yellow River is an important section for flood control at present. Carrying out river training in a planned way is a main measure to lengthen the lifetime of the existing channel. It is shown by the practice of river training on transitional section and a part of wandering section that the wandering section in the lower reaches can be corrected into slightly bended shape mainly for the purpose of flood control. The design and arrangement of engineering works should meet the requirements of flood release and detention and sediment deposition at wide floodplain area. The Xiaolangdi Project will be completed by the year of 2000, which can keep the balance of erosion and deposition in the wandering section about 20 years. Therefore, the opportune time should be catched for training the wandering section.
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