Study of an abnormally strong saltwater intrusion in the Humen Channel of the Pearl River estuary  

作　　者：Jiaxi Wang Bo Hong Wenping Gong 

机构地区：[1]School of Marine Sciences,Sun Yat-sen University,Zhuhai 519082,China. [2]Southern Marine Science and Engineering Guangdong Laboratory,Zhuhai 519000,China. [3]School of Civil and Transportation Engineering,South China University of Technology,Wushan Rd.,Tianhe District,Guangzhou 510641,China. [4]Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering,Guangzhou 510275,China.

出　　处：《Anthropocene Coasts》2022年第1期58-69,共12页人新世海岸(英文)

基　　金：the National Natural Science Foundation of China(grant numbers 51761135021,41890851).

摘　　要：Saltwater intrusion in estuaries has become a serious environmental problem,such as in the Pearl River estuary(PRE).In this study,we used a fully validated three-dimensional hydrodynamic model EFDC to numerically investigate the saltwater intrusion in the PRE during the dry season of 2007-2008.Based on the measured salinity,an abnormally strong saltwater intrusion occurred in the Humen Channel in February 2008.The saltwater intrusion occurred twice a month to varying extents,with each saltwater intrusion happening 1-3 days before spring tide,and the stronger saltwater intrusion always occurred at the beginning of the month.Our model results show that caused by a long-term northerly wind during the dry season,the increased steady shear term in the salt transport flux were responsible for the abnormally strong saltwater intrusion in the Humen Channel.The abnormally strong saltwater intrusion has features of long duration,far-reaching upstream distance and great hazard to freshwater resources.The wind effects were revealed to mainly influence the bottom salinity in the middle reach of the PRE,especially near the Humen outlet.

关 键 词：Saltwater intrusion EFDC Pearl River estuary Humen Channel 

分 类 号：P73[天文地球—海洋科学]