摘要
对长江中下游镇扬河段的水沙特征和演变特点作了归纳性概述,结合该河段各时期的治理情况,分析了河道现状及存在的主要问题。分析表明,近年来镇扬河段总体河势基本稳定,局部仍存在许多不稳定因素。主要表现为:仪征水道主流贴岸冲刷、世业洲左汊发展速率加快、和畅洲左汊持续发展而导致岸线崩塌、右汊萎缩淤积,特别是和畅洲南缘边滩淤宽以及征润洲尾淤积下延等。在此基础上,为达到较好控制全河段河势的目标,提出了相应的河道治理方案及相应工程措施。
In the combination of regulation condition of Zhenjiang-Yangzhou reach in the middle and lower Yangtze River,this paper summarizes the flow-sediment characteristics and evolution features of this reach and analyzes the state quo and main problems of the river channel.The results show that in recent years,the river regime of the reach is basically stable with many unstable factors still existing in local area.The major problems are nearshore scoring of Yizheng river course by main flow,rapid development of left branch of Shiye sandbar,bank collapse resulted by successive development of left river course of Hechang sandbar and shrinkage and deposition of right course especially widening of south side-beach and extending downwards of Zhengrun sandbar.On the base of the analysis,the corresponding river channel regulation scheme and engineering measures are put forward for controlling the river regime of the whole river channel.
出处
《人民长江》
北大核心
2009年第21期9-11,58,共4页
Yangtze River
基金
中央级公益性科研院所基本科研业务费项目(YWF200802)
关键词
河道演变
河势特点
治理措施
镇扬河段
river evolution
river regime characteristics
regulation measures
Zhenjiang-Yangzhou reach
