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《Yellow River》 2010-01
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Study on Bankfull Discharge of Gaocun-Aishan Reach Increased by Flood Scour

SUN Zan-ying1,LI Yong1,LI Xiao-ping1,LI Jian-jun2,LUO Xi3(1.Yellow River Institute of Hydraulic Research,Zhengzhou,Henan 450003;2.Yellow River Conservancy Commission,Zhengzhou,Henan 450003;3.Henan Yellow River Engineering Bureau,Zhengzhou,Henan 450003)  
The paper studies the roughness variation and variation trend of erosion intensity of each section of the lower Yellow River since the operation of Xiaolangdi Reservoir.The outcomes show that a) the roughness of the section downstream Jiahetan is not increased because of coarser bed material since the operation of Xiaolangdi Reservoir;b) the influence of sediment getting coarser to the scour only develops to the reach of Huayuankou-Jiahetan,the scour intensity of the reach of Gaocun-Aishan is not weakened remarkably since the operation of the reservoir;c) as long as the reservoir discharge is greater than 1 500 m3/s,the reach of Gaocun-Aishan will be scoured under the current boundary condition of the channel;d) if the bankfull discharge of the reach of Gaocun-Aishan is increased from 3 810 m3/s to 4 000 m3/s,it requires about 3.5 billion m3 of water with the reservoir discharge greater than 4 000 m3/s.
【Fund】: 国家自然科学基金资助项目(50709012)
【CateGory Index】: P333
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