2022年后汛期长江口严重咸潮空间分布特征分析
Spatial Distribution Characteristics of Serious Saltwater Intrusion of Yangtze River Estuary in Post-flood Season of 2022
乔红杰 1王金华 2张志林 1卜东平3
作者信息
- 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
- 2. 南京水利科学研究院,江苏 南京 210029
- 3. 上海市浦东新区河道管理事务中心,上海 201200
- 折叠
摘要
2022 年长江流域出现"汛期反枯"现象,9 月长江口河段遭遇了历史罕见的咸潮入侵,对长江口沿江水源地造成严重威胁.为研究 2022 年后汛期(9～10 月)长江口严重咸潮入侵的空间分布,掌握咸潮上溯的最上游位置,基于 2022 年 9～11 月长期站实测资料和咸潮应急监测资料及历年实测水文资料,定量分析了长江口咸潮的横向、纵向及垂向分布,结合 FVCOM盐度数值模型进行模拟.结果显示,北港水域盐度底表层差异显著,底表层盐度比值平均为 25;咸潮最严重时,影响到徐六泾节点段,最上游到达苏通大桥上游约 1.0 km.研究结果对长江口应急水源地的规划选址具有指导意义.
Abstract
In 2022,it experienced a phenomenon of"flood season back dry"in the Yangtze River basin.The Yangtze River estuary was encountered by historic saltwater intrusion in September,and the water source along the Yangtze River estuary has been seriously affected.To study the spatial distribution characteristics and master the location of the upper reaches of the saltwater intrusion in post-flood season(Sep.-Oct.)of 2022,based on the salinity data of long-term station of Yangtze River Estuary from September to November 2022,and the salinity data of special emergency monitoring data during saltwater intrusion and historical measured hydrological data,the horizontal,downstream along the river and ver-tical distribution of saltwater intrusion in the Yangtze Estuary were quantitatively analyzed by combining the FVCOM nu-merical salinity model.The results show that there is a significant gradient change of salinity at south branch,the average salinity ratio of the bottom layer and surface layer is 25;When the saltwater intrusion was at the worst,it affected Xuliu-jing reach;Saltwater appeared in the upper reaches of Sutong Bridge about 1.0 km.The search result has guiding signifi-cance to the site selection of emergency water source in the Yangtze River Estuary.
关键词
长江口/咸潮入侵/盐度/数值模型/空间分布Key words
Yangtze River Estuary/saltwater intrusion/salinity/numerical model/spatial distribution引用本文复制引用
基金项目
上海市水务局科研项目(沪水科2023-06)
国家自然科学基金面上项目(42076174)
长江水利委员会水文局科技创新基金项目(SWJ-CJX23Z06)
出版年
2024
NETL
NSTL
万方数据