长江下游高港边滩演变趋势及其对深水航道的影响

随着长江南京以下12. 5 m深水航道落成洲和鳗鱼沙两个浅滩治理工程的实施,高港浅区段的外部条件发生变化。通过河床演变分析和数值模拟等方法预测10年末高港河段的航道通航条件,分析高港边滩演变趋势及对深水航道通航的影响。研究结果表明:未来扬中河段的河势基本稳定,高港边滩不会大幅度淤涨,也不易冲刷消失;高港边滩段中上段的航道条件能满足深水航道通航条件,高港边滩下段存在轻微碍航情况。

Evolution trend of Gaogang side beach in lower reaches of the Yangtze River and its influence on deep water navigation

With the implementation of the two shoal regulation projects of Luochengzhou and Manyusha in the 12.5 m deep water channel below Nanjing of the Yangtze River,the external conditions of the Gaogang side beach have changed.The channel navigation conditions of Gaogang reach at the end of 10 years are predicted by means of riverbed evolution analysis and numerical simulation,and the evolution trend of Gaogang side beach and its influence on navigation in deep water are analyzed.The results show that:in the future,the river regime of Yangzhong reach will be basically stable,and the Gaogang side beach will not be silted up or washed away;the channel conditions of the upper middle section of the Gaogang reach can meet the navigation conditions of the deep-water channel,but there are slight navigation obstacles in the lower section of the Gaogang reach.