长江口新增太仓险工段成因及应对措施初探  

Cause Analysis and Preliminary Countermeasures for New Vulnerable Section in Taicang Reach of Changjiang Estuary

作　　者：刘传杰 张朝阳 LIU Chuanjie;ZHANG Chaoyang(Changjiang River Estuary Bureau of Hydrological and Water Resources Survey,Changjiang Water Resources Commission,Shanghai 200136,China)

机构地区：[1]长江水利委员会水文局长江口水文水资源勘测局,上海200136

出　　处：《长江技术经济》2024年第4期1-7,共7页Technology and Economy of Changjiang

摘　　要：近年来,长江口河段局部河床出现强烈冲刷,太仓河段南支新太海汽渡至七丫口段升级为新的险工段,预警级别为最高级。通过对长江口太仓险工段水文资料、多频次高精度原型实测地形数据的初步探究,发现新险工段近岸段河床演变呈现出深槽南逼、陡坡加剧、冲刷强度增大、最大冲刷区上移等特点,险工段成因主要包括上游河势调整、上游来沙减少、近岸流速流向变化等。针对险工段成因,提出了应对策略。Local parts of riverbeds in the Changjiang Estuary have seen intense scouring in recent years,resulting in additional vulnerable section reaching the highest warning level extending from Xintaihai ferry dock to Qiyakou in the south branch of Taicang reach.Based on high-precision field measured hydro-topographic data,this paper reveals several critical changes in the riverbed near bank in this newly identified vulnerable section.Such changes include the southward advance of deep channel,the aggravation of steep bank slope,the increasing of erosion rates,and the upward migration of erosion area.The study also identifies several primary causes for this vulnerable section,including the adjustment of upstream river regime,the decrease of sediment discharge from Changjiang River Basin,and changes in the velocity and direction of flow near riverbank.Based on these findings,the paper proposes targeted countermeasures to address these issues.

关 键 词：长江口 新险工段 冲刷成因 太仓河段 

分 类 号：U617[交通运输工程—船舶及航道工程] TV147[交通运输工程—船舶与海洋工程]