摘要
分析了1973—2005年宁蒙河段汛期场次洪水的冲淤特性、冲淤效率与下河沿断面水沙量之间的关系。结果表明:当下河沿断面洪水平均含沙量大于7 kg/m3时,宁蒙河段以淤积为主;当下河沿断面洪水平均含沙量小于7 kg/m3时,宁蒙河段以冲刷为主,且流量为2 200～2 500 m3/s时冲刷效率最大,此时洪水总水量应大于25亿m3。
This paper analyzed the relationship between the quantity of sediment and water at Xiaheyan and the characteristics and efficiency of channel scour and fill by studying the floods in flood season in Ning-Mong reach during the period of 1973-2005.The outcome shows that： a） it gives priority to deposition in Ning-Mong reach when the average sediment concentration at Xiaheyan during flood exceeds 7 kg/m3;b） erosion when the sediment concentration falls short of 7 kg/m3;c） the scour efficiency peaks when the flood flow rate is between 2 200 and 2 500 m3/s,and meanwhile the flood volume is supposed to exceed 2.5×109 m3.
出处
《人民黄河》
CAS
北大核心
2011年第11期27-28,63,共3页
Yellow River
基金
水利部公益性行业科研专项(200701020)
关键词
冲淤效率
冲淤特性
场次洪水
宁蒙河段
黄河
efficiency of scour and fill
characteristics of scour and fill
floods
Ning-Mong reach
Yellow River
