黄河下游河道平滩流量变化及其与汛期水沙条件的关系
Variation of bankfull discharge and its relationship with flow and sediment conditions during flood season in the Lower Yellow River
韩小军 1卢书慧 2史红玲 3林树峰1
作者信息
- 1. 滨州市引黄灌溉服务中心,山东滨州 256600
- 2. 山东黄河河务局黄河河口管理局,山东东营 257091
- 3. 中国水利水电科学研究院,北京 100048
- 折叠
摘要
采用实测资料分析的方法,研究了黄河下游河道平滩流量变化与汛期水沙条件的关系.黄河下游河道平滩流量的变化是先减小后增大,由20世纪中期的7 000～9 000 m3/s减小到20世纪末期的2 000～4 000 m3/s;21世纪后,平滩流量恢复至4 000～7 000 m3/s.2000年前孙口平滩流量与汛期水沙条件关系点群与2000年后两者关系点群存在明显分区,表明小浪底水库蓄水拦沙运用后,下游河道冲刷演变机理与前期河道淤积演变机理存在较大差异.建立的孙口平滩流量与汛期水沙条件的定量关系表明,黄河下游河道平滩流量随着汛期平均水量的增大而增大,随着汛期平均来沙系数的增大而减小.
Abstract
Based on measured data,the variation of bank-full discharge and its relationship with flow and sediment conditions during flood season in the Lower Yellow River was analyzed.The result shows that the variation trend of bank-full discharge in the Lower Yellow River is first decreasing from 7 000～9 000 m3/s in the mid-20th century to 2 000～4 000 m3/s in the late 20th century,and then increasing to 4 000～7 000 m3/s in the 21s1 century.The established relationship between bankfull discharge at Sunkou and flow and sediment conditions during flood season at Huayuankou shows the bankfull discharge increases with the increase of runoff and the decrease of the sediment coefficient during flood season.However,there is an obvious difference in the relationships between bank-full discharge of Sunkou and flow and sediment conditions during flood season at Huayuankou before and after 2000,which means that the use of water storage and sediment control in Xiaolangdi reservoir has changed the evolution mechanism in the Lower Yellow River.
关键词
黄河下游/平滩流量/水沙条件/河道演变/回归分析Key words
Lower Yellow River/bankfull discharge/flow and sediment conditions/channel evolution/regres-sion analysis引用本文复制引用
基金项目
国家自然科学基金项目(U22A20237)
出版年
2024
国家科技期刊平台
NSTL
万方数据