Spatial Distribution Characteristics of Serious Saltwater Intrusion of Yangtze River Estuary in Post-flood Season of 2022
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.
Yangtze River Estuarysaltwater intrusionsalinitynumerical modelspatial distribution
NETL
NSTL
万方数据
