鹅头分汊河段航道整治工程适应性分析

发布时间：2019-02-28 20:53

【摘要】：对鹅头分汊河段进行了分析.鹅头分汊河段多汊并存,洲滩易变,航道条件较差.三峡工程蓄水前后,长江中下游鹅头分汊河道一般都实施了航道整治工程,整治原则以稳定洲滩、保持分汊为主.但由于鹅头分汊河段均处于周期性调整过程中,对于不同演变阶段,河段碍航特性存在差异,工程治理重点和效果也不同.演变初期的汊道,周期性调整动力较强,洲滩演变剧烈,整治思路以稳定分流格局为主,但整治工程往往不能立刻发挥效果,需要反复强化;处于演变中期和末期的汊道,整治工程更着重局部航道条件的改善,一般治理效果较好,但仍需重视河段周期性调整动力及三峡工程蓄水后河段河床冲淤特性,加强观测,及时采取措施,巩固工程效果.
[Abstract]:The braided reach of Goose head is analyzed in this paper. There are many branches in the braided reach of Gotou, the beach is easy to change, and the channel condition is poor. Before and after the impoundment of the three Gorges Project, the channel regulation works are generally carried out in the Etou braided channel of the middle and lower reaches of the Yangtze River. The regulation principle is to stabilize the beach and maintain the bifurcation. However, due to the course of periodic adjustment of the braided reach of Gotou, for different stages of evolution, there are differences in the navigation obstructing characteristics of the reach, and the emphasis and effect of the project management are also different. In the initial stage of evolution, the periodic adjustment power is strong, the tidal flat changes violently, and the idea of regulation is mainly the stable distributary pattern, but the renovation project can not bring into play the effect immediately, and needs to be strengthened over and over again. In the middle and late stages of evolution, the regulation works pay more attention to the improvement of the local channel conditions, and the general control effect is better, but it is still necessary to pay attention to the periodic adjustment power of the reach and the scouring and silting characteristics of the river bed after the impoundment of the three Gorges Project, so as to strengthen the observation. Take timely measures to consolidate the engineering effect.
【作者单位】：长江科学院河流研究所;武汉大学水资源与水电工程科学国家重点实验室;
【基金】：国家自然科学基金项目(编号:11472199)
【分类号】：TV147

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