Impacts of Different Dynamic Factors on the Saltwater Intrusion in the Northern Branch of the Yangtze Estuary

作     者：WANG Jin-hua ZHANG De-bin ZHANG Wei-sheng ZHANG Jin-shan 

作者机构：State Key Laboratory of Hydrology-Water Resources and Hydraulic EngineeringNanjing Hydraulic Research InstituteNanjing 210029China College of HarborCoastal and Offshore EngineeringHohai UniversityNanjing 210098China 

出 版 物：《China Ocean Engineering》 (中国海洋工程（英文版）)

年 卷 期：2019年第33卷第6期

页      面：673-684页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0908[农学-水产] 07[理学] 0707[理学-海洋科学] 08[工学] 0807[工学-动力工程及工程热物理] 081501[工学-水文学及水资源] 0815[工学-水利工程] 0824[工学-船舶与海洋工程] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：financially supported by the National Key Research and Development Program of China(Grant Nos.2016YFC0401505 and 2017YFC0405402) the National Natural Science Foundation of China(Grant No.51779147) 

主　　题：Yangtze Estuary saltwater intrusion ocean currents vertical stratification FVCOM 

摘      要：A 3-D baroclinic numerical model is established to study the temporal and spatial distribution of salinity in the Northern Branch(NB) of the Yangtze Estuary(YE) in response to river runoff, wind and currents. The idealized,process-oriented studies show that the lower river runoff in the dry season is the main driving factor for the spilling over from the NB to the Southern Branch(SB). The NB takes longer time to get in dynamic stable state compared with the SB, as the runoff transfers from the wet season to the dry season. The vertical stratification intensity of the NB has obvious periodic phenomena in the dry season, and the stratification strength is enhanced under the action of low runoff and north wind, which further weakens the vertical transport of water. Momentum balance analysis suggested that the landward net flux increases when considering the influence of the moderate north wind, and the landward flux will enhance if considering the boundary current during the spring tide. With the influence of the boundary current, increases the average salinity of the NB, as well as the intrusion degree from the NB to the *** indicates that the nearshore ocean current of the Yellow Sea is an important factor affecting the saltwater intrusion in the NB of the YE.