长江口不同河段近期河床演变特点及碍航特性分析

根据现场调研和多年实测资料,分析和总结了近10 a长江口不同河段河床演变特点及其变化趋势,并结合航道发展规划目标,从航道水深、宽度、走向及稳定性等指标,分析了长江口不同河段的碍航特性。结果表明,长江口多数河段尚未得到有效的人工控制,局部河段航槽稳定性较差,部分航段水深较浅,制约了航道资源的开发利用。为合理开发利用和有效保护长江口航道资源,迫切需要根据近期河势变化特点和碍航特性,进一步明确航道治理基本原则与思路,提出科学合理的工程布置方案。

Recent fluvial processes and navigation-obstructing characteristics in different reaches of the Yangtze Estuary

Based on the site survey and years of field measurement data,the fluvial processes in the recent ten years and its variation trend in the different reaches of the Yangtze Estuary were analyzed and summarized.With the waterway development planning,navigation-obstructing characteristics in the different reaches of the Yangtze Estuary were analyzed from the index of water depth,width,direction and stability.The results show that it has not yet been in effective manual control in the most reaches of the Yangtze Estuary,channel stability in local reaches is poor and the depth of partial waterways is shallow,which restrict the development and utilization of waterway resources.For the rational exploitation and effective protection of the Yangtze Estuary waterway resources,it is need to further clarify the basic principle and ideas of navigation channel regulation and propose the scientific and rational project layout scheme according to the recent changes of river regime and the navigation-obstructing characteristics.