摘要
长江下游土桥水道为一顺直分汊型河道,为解决主通航汊道内常出现水深不足的碍航浅包,且由于其规模及位置不稳定导致的碍航问题,将河床演变分析与二维水流数值模拟计算相结合,分析河床演变主导因素,探讨碍航浅包形成原因及航道整治措施。研究结果表明,碍航浅包的形成与河道特性及汊道演变密切相关,碍航问题的解决必须在疏浚的基础上配合改善局部河道形态、增加退水过程航槽冲刷力度的工程措施,如丁坝工程和锁坝工程,以达到有效提高浅区冲刷能力,改善航道水深的目的。
The Tuqiao Waterway is a straight and multi-branched reach in lower stream of the Yangtze River.In order to solve the navigation-obstructing problem by shallows of uncertain scale and position in the river channel,we analyze the dominant factor of fluvial process,and discuss the formation cause of the navigation-obstructing shallows and the measures for regulating the waterway by combining with riverbed evolution analysis and two-dimensional numerical simulation of the flow.The results show that the formation of navigation-obstructing shallows is closely related to riverbed features and evolution of river branches.To solve navigation-obstructing problem,we should combine dredging and engineering measures such as improving local river patterns and increasing sediment scouring intensity.The spur dyke and closure dam can be adopted so as to increase sediment scouring capacity in shallow areas,and the improvement of the depth in the waterway can be realized.
出处
《人民长江》
北大核心
2011年第4期16-19,49,共5页
Yangtze River
关键词
土桥水道
河床演变
数学模型
航道整治
长江下游河道
Tuqiao Waterway
riverbed evolution
numerical model
waterway regulation
river channel of lower Yangtze River
