长江澄通河段天生港水道近期演变及整治初探  

Evolution and improvement of Tianshenggang River Channel at Chengtong River Section of Yangtze River Basin in recent period

作　　者：单婷婷[1] 杜德军[2] 吴道文[2] Shan Tingting Du Dejun Wu Daowen

机构地区：[1]江苏省水文水资源勘测局南通分局,南通226406 [2]南京水利科学研究院,南京210024

出　　处：《中国水利》2017年第15期52-54,共3页China Water Resources

基　　金：国家重大科学仪器设备开发专项(2011YQ070055);江苏省水利科技项目(2015004);南京水利科学研究院院基金(Y216016)

摘　　要：根据实测资料,分析了天生港水道近年河床冲淤和水流泥沙的变化。研究表明:其进口与如皋中汊垂直,落潮流较弱,是以涨潮流为主的支汊;其冲淤变化受上游如皋中汊演变及下游横港沙变化影响;20世纪70—90年代总体表现为淤积,90年代后特别是近年上游来沙量减小,河床逐渐稳定。横港沙整治工程实施后,天生港水道中下段水流归顺,滩槽水沙交换减小,有利于河势稳定;进口附近切滩工程的实施,可改善进口的水流条件,增加落潮流,有利于天生港水道河势稳定。According to actual observing data, recent riverbed sedimentation and change of flow and sediment in Tianshenggang River Channel are evaluated. The results indicate that the entrance is built vertically to the middle branch of Rugao with less falling tide but more flood tide; the change of sedimentation are affected by evolution of middle branches of Rugao and sediment change of Henggang downstream; sedimentation dominated the period of 1970-1990 and riverbed has turned to be more stable due to reduction of coming sand from upstream in recent years, in particularly after 1990s. Thanks to the project of Sediment Regulation for Henggang, the flow in the middle and lower section of Tianshenggang Channel has been under control that reduces the time of water-sand exchange overbank and benefits to the stabilization of river regime. The cutoff of beach improves the flow condition of entrance and increase the outgoing flow that may stable the river regime in Tianshenggang Channel.

关 键 词：长江 澄通河段 天生港水道 河床冲淤 整治 

分 类 号：TV147[水利工程—水力学及河流动力学]