【摘要】：研究洪水過程在黃河內(nèi)蒙古河段的響應(yīng)可為該河段的河道整治規(guī)劃和黃河上游水資源開發(fā)方案的確定提供技術(shù)支撐。本文采用三維水沙數(shù)學(xué)模型,對黃河內(nèi)蒙古巴彥高勒至頭道拐河段開展了不同量級洪水過程的模擬研究。結(jié)果表明:洪水演進(jìn)方面,現(xiàn)階段巴彥高勒到頭道拐的洪水演進(jìn)時(shí)間較20世紀(jì)80年代有所增加,并維持在7～9 d;其中三湖河口以上河段河槽是主要的行洪區(qū)間;往下游發(fā)展,水流漫灘程度逐漸加大。河床沖淤方面,通過合適的水沙搭配和持續(xù)的洪水過程可實(shí)現(xiàn)該河段淤灘刷槽的有效調(diào)控;且主槽沖刷強(qiáng)度同流量之間存在非線性響應(yīng)關(guān)系,并在流量2 500 m~3/s時(shí)輸沙能力達(dá)到最大。此外,典型彎曲河段裁彎取直過程的模擬表明,持續(xù)的大流量洪水過程是實(shí)現(xiàn)局部河段自然裁彎的必要條件,通過裁彎取直可有效提高河段的輸沙能力。
[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，

本文編號：2484746