摘要
下荆江河道蜿蜒曲折,河岸崩塌、滩槽变化频繁,不利于防洪、航运。经过收集整理下荆江莱家铺弯道近40 a的实测地形资料,对比分析了不同时期滩槽变化及浅滩演变特点,并结合逻辑推理、数值模拟实验,探讨了河床演变影响因素,揭示了河床演变及航道条件变化趋势。结果表明,弯道凸岸边滩将持续冲刷,遇较大洪水存在切滩隐患;弯道下游过渡段左侧的中洲子高滩崩退趋势加剧,致使弯道进口及过渡段河道展宽,形成交错浅滩,航道条件有恶化趋势。对该弯道河道治理及下荆江演变规律研究有一定参考价值。
The river channel of lower Jingjiang River is meandered ; the bank collapse and frequent changes of shoals and bars exist, which is unfavorable to the flood control and navigation. The measured terrain data of Laijiapu bend of lower Jingjiang River in the recent 40 years are collected and the evolution characteristics of shoals, bars and channels in different periods are compared and analyzed. Through logic inference and mathematical simulation, the influential factors of riverbed evolution are discussed and the variation trend of river bed and waterway condition is discovered. The results show that the point bar of convex bank in the river bend is scouring continuously, and there is risk of bend cutting during large flood ; the collapse of Zhongzhouzi shoal at the left side of downstream transition of the bend is intensified, which widens the entrance and transition reach of the bend and forms intricate shoals. The waterway condition is worsening.
出处
《人民长江》
北大核心
2013年第1期26-29,68,共5页
Yangtze River
基金
交通运输重大科技专项"黄金水道通过能力提升技术"(2011-328-548-50)
关键词
弯曲河段
浅滩演变
航道变化
下荆江河段中图法
curved reach
evolution of shoal
waterway variation
lower Jingjiang River
