Study of Flood Erosion Efficiency and its Adjustment in the Lower Yellow River during the Storage Periods of the Sanmenxia Reservoir and the Xiaolangdi Reservoir
This paper analyzes erosion efficiencies of floods in the Lower Yellow River during the storage periods of the Sanmenxia Reservoir and the Xiaolangdi Reservoir.The results indicate that erosion efficiency of total load at the downstream of the dam increases with the increase of average flood discharge if discharge is less than 4,000 m3/s and maintains a constant value of 20 kg/m3 when discharge is greater than 4,000 m3/s.By investigating the erosion efficiency of grouped particles,we find that the decreasing extension of erosion efficiency of fine particles is higher than the increasing extension of erosion efficiency of coarse one,which is the crucial reason for erosion efficiency of total load holding at constant when discharge is greater than 4,000 m3/s.Supply of fine particles from bed materials is the major factor that affects erosion efficiencies of total load.It is suggested that the average flood discharge during the storage period of the Xiaolangdi Reservoir should be controlled at about 4,000 m3/s to obtain the highest erosion efficiency,thus to make good use of the limited water resources and improve channel drainage capacity of the Lower Yellow River.
erosion efficiency storage period total load size fraction flood of lower sediment concentration supply of bed material the lower Yellow River
Li Xiaoping Lv XiuHuan Li Wenxue
Institute of Hydraulic Research, Yellow River Conservancy Commission,Zhengzhou, 450003, China Department of International Cooperation, Science and Technology, Yellow River Conservancy Commission Yellow River Engineering Consulting Co., Ltd., Zhengzhou, 450003, China
国际会议
The 5th International Yellow River Forum (第五届黄河国际论坛)
郑州
英文
352-359
2012-09-24（万方平台首次上网日期，不代表论文的发表时间）