黄河内蒙古河段洪水演进与冲淤模拟研究

发布时间：2019-05-24 09:13

【摘要】：研究洪水过程在黄河内蒙古河段的响应可为该河段的河道整治规划和黄河上游水资源开发方案的确定提供技术支撑。本文采用三维水沙数学模型,对黄河内蒙古巴彦高勒至头道拐河段开展了不同量级洪水过程的模拟研究。结果表明:洪水演进方面,现阶段巴彦高勒到头道拐的洪水演进时间较20世纪80年代有所增加,并维持在7～9 d;其中三湖河口以上河段河槽是主要的行洪区间;往下游发展,水流漫滩程度逐渐加大。河床冲淤方面,通过合适的水沙搭配和持续的洪水过程可实现该河段淤滩刷槽的有效调控;且主槽冲刷强度同流量之间存在非线性响应关系,并在流量2 500 m~3/s时输沙能力达到最大。此外,典型弯曲河段裁弯取直过程的模拟表明,持续的大流量洪水过程是实现局部河段自然裁弯的必要条件,通过裁弯取直可有效提高河段的输沙能力。
[Abstract]:The study of flood process response in Inner Mongolia reach of the Yellow River can provide technical support for the river regulation planning and the determination of water resources development scheme in the upper reaches of the Yellow River. In this paper, a three-dimensional mathematical model of water and sediment is used to simulate the flood process of different orders of magnitude in the section of Bayan Gaolle to Tou Dao Jiao River in Inner Mongolia of the Yellow River. The results show that in the aspect of flood evolution, the flood evolution time from Bayan Gaoler to Tou Dao in the present stage is higher than that in 1980s, and it is maintained at 7 鈮，

本文编号：2484746