长江中游新洲—九江河段河床演变分析及整治方案研究

根据新洲-九江河段近几十年来原型观测资料，深入分析了顺直分汉形过渡河段的演变特点及碍航特性，提出了“固滩守槽，稳定主流”的治理原则，在此基础上提出治理方案，并结合平面二维水沙数学模型，对治理方案效果进行了计算。结果表明：河段采取以守护为主、调整为辅，利用整治建筑物稳定并适当抬高已有滩体，归顺过渡浅区枯期水流的治理思路是正确的，工程方案实施后可以较好地解决本河段的碍航问题。

Analysis on channel evolution of Xinzhou Jiujiang river reach in the middle of the Yangtze River and the regulation scheme research

Based on the prototype observation data for Xinzhou-Jiujiang river reach in recent decades, the paper analyzes the corresponding fluvial evolution and navigation-failure characteristics, and puts forward the following guidelines for regulation ： strengthening bars, protecting riverbed and stabilizing main stream. At the same time, a horizontal two-dimensional model is developed to check the effectiveness of undergoing regulation projects. The results indicate that the regulation of Xinzhou- Jiujiang reach mainly focuses on protection rather than adjustment and the detail lies on appropriately adjusting the main flow of shoal areas in transitional reach to maintain enough navigating depth in dry season by using regulating structures to stabilize and elevate the bars. The modeling results prove the validity of the proposed regulation which aims at solving the navigation failure problems.