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学科主题: Oceanography
题名: Investigation of saltwater intrusion and salinity stratification in winter of 2007/2008 in the Zhujiang River Estuary in China
作者: Zhou, W ; Wang, DX ; Luo, L
通讯作者: dxwang@scsio.ac.cn
关键词: saltwater intrusion ; spring tide ; neap tide ; salt transport
刊名: ACTA OCEANOLOGICA SINICA
发表日期: 2012
卷: 31, 期:3, 页:31-46
部门归属: [Zhou Wei; Wang Dongxiao; Luo Lin] Chinese Acad Sci, S China Sea Inst Oceanol, Key Lab Trop Marine Environm Dynam, Guangzhou 510301, Guangdong, Peoples R China; [Zhou Wei] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
项目归属: LTO
摘要: Saltwater intrusion is a serious environmental problem in the Zhujiang River Estuary (ZRE), which threatens the water supply of fifteen million people. The hydrological observations as well as meteorological and tidal forcing in the winter of 2007/2008 were analyzed to examine the saltwater intrusion in the ZRE. The observational results suggest that the maximum vertical difference of salinity can reach 10 in the Humen Channel during neap tide, but is very small in the Hengmen Channel. The vertically averaged salinity from time series stations during spring tide is higher than that during neap tide. A three-dimensional finite difference model was developed based on the environmental fluid dynamic code (EFDC) to study the mechanism of saltwater intrusion and salinity stratification in the ZRE. By analyzing the salt transport and the temporal variation of saltwater intrusion, the authors found that the net salt transport due to the estuarine circulation during neap tide was more than that during spring tide. This caused salt to advance more into the estuary during neap tide. However, saltwater intrusion was stronger during spring tide than that during neap tide because the spring-neap variation in salt transport was small relative to the total length of the saltwater intrusion. The physical mechanism causing this saltwater intrusion was investigated by a series of sensitivity experiments, in order to examine saltwater intrusion in response to river discharge and winds. The freshwater source was a dominant influencing factor to the saltwater intrusion and controlled salinity structure, vertical stratification and length of the saltwater intrusion. The prevailing northeast monsoon during winter could increase the saltwater intrusion in the ZRE. Though the southwest wind was unfavorable to saltwater intrusion during spring tide, it could increase stratification and saltwater intrusion during neap tide.
语种: 英语
WOS记录号: WOS:000305262200004
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10173
Appears in Collections:热带海洋环境国家重点实验室(LTO)_期刊论文

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Recommended Citation:
Zhou, W; Wang, DX; Luo, L.Investigation of saltwater intrusion and salinity stratification in winter of 2007/2008 in the Zhujiang River Estuary in China,ACTA OCEANOLOGICA SINICA,2012,31(3):31-46
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