长江上游龙门水道河床演变及碍航原因分析

发布时间：2018-05-21 05:20

本文选题：龙门水道 + 河床演变　；参考：《水运工程》2017年03期

【摘要】：龙门水道为长江上游重点碍航河段,兼具浅险滩和急流滩的特点。采取实测资料研究该河段近期水沙特性,以及岸线、深泓和典型断面等变化,分析龙门水道碍航原因。结果表明,龙门水道平面形态稳定,岸线和深槽位置变化很小,年际间冲淤交替。在上游水库蓄水等的影响下,来沙量减少,枯水河槽小幅冲刷。弯道段洪、枯河宽差距较大,汛期易在凸岸形成碍航浅滩;中、枯水流量下,大河村丁顺坝束水形成急流滩,弯顶右岸石梁头部的复杂流态与左岸漫滩斜流综合作用形成险滩。
[Abstract]:Longmen waterway is an important channel in the upper reaches of the Yangtze River, which is characterized by shallow banks and rapids. The recent characteristics of water and sediment, as well as the changes of shoreline, deep channel and typical section in the reach of the river are studied by using the measured data, and the reasons for the obstruction of navigation in the Longmen waterway are analyzed. The results show that the plane shape of Longmen waterway is stable, the change of shoreline and deep channel position is very small, and the interannual erosion and deposition alternates. Under the influence of upstream reservoir water storage, the amount of incoming sediment is reduced, and the low water channel is scoured slightly. In the bend section of flood, the wide gap between the dry river and the river is large, the shallow beach is easily formed on the convex bank in flood season, and under the low water flow, the water of Dingshun dam in Dahe village forms a jet beach, and the complex flow pattern of the head of the stone beam on the right bank of the bend top and the oblique flow of the left bank flood bank form a dangerous beach.
【作者单位】：交通运输部天津水运工程科学研究院;
【分类号】：U617;TV147

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