Responses of estuarine salinity and transport processes to sea level rise in the Zhujiang (Pearl River) Estuary

CHEN Yuxiang; ZUO Juncheng; ZOU Huazhi; ZHANG Min; ZHANG Kairong

doi:10.1007/s13131-016-0857-2

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Article Navigation > Acta Oceanologica Sinica > 2016 > 35(5): 38-48

CHEN Yuxiang, ZUO Juncheng, ZOU Huazhi, ZHANG Min, ZHANG Kairong. Responses of estuarine salinity and transport processes to sea level rise in the Zhujiang (Pearl River) Estuary[J]. Acta Oceanologica Sinica, 2016, 35(5): 38-48. doi: 10.1007/s13131-016-0857-2

Citation:

CHEN Yuxiang, ZUO Juncheng, ZOU Huazhi, ZHANG Min, ZHANG Kairong. Responses of estuarine salinity and transport processes to sea level rise in the Zhujiang (Pearl River) Estuary[J]. Acta Oceanologica Sinica, 2016, 35(5): 38-48. doi: 10.1007/s13131-016-0857-2

Citation:

CHEN Yuxiang, ZUO Juncheng, ZOU Huazhi, ZHANG Min, ZHANG Kairong. Responses of estuarine salinity and transport processes to sea level rise in the Zhujiang (Pearl River) Estuary[J]. Acta Oceanologica Sinica, 2016, 35(5): 38-48. doi: 10.1007/s13131-016-0857-2

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Responses of estuarine salinity and transport processes to sea level rise in the Zhujiang (Pearl River) Estuary

doi: 10.1007/s13131-016-0857-2

1.
Key Laboratory of Coastal Disaster and Defence of Ministry of Education, Hohai University, Nanjing 210098, China
2.
Key Laboratory of the Zhujiang Estuarine Dynamics and Associated Process Regulation, Ministry of Water Resources, Guangzhou 510610, China
3.
South China Sea Marine Prediction Center, State Oceanic Administration, Guangzhou 510310, China
4.
Yalong River Hydropower Development Co., Ltd., Chengdu 610051, China

Received Date: 2015-12-02
Rev Recd Date: 2016-03-03

Abstract

Abstract

Understanding the changes of hydrodynamics in estuaries with respect to magnitude of sea level rise is important to understand the changes of transport process. Based on prediction of sea level rise over the 21st century, the Zhujiang (Pearl River) Estuary was chosen as a prototype to study the responses of the estuary to potential sea level rise. The numerical model results show that the average salt content, saltwater intrusion distance, and stratification will increase as the sea level rises. The changes of these parameters have obvious seasonal variations. The salt content in the Lingdingyang shows more increase in April and October (the transition periods). The saltwater intrusion distance has larger increase during the low-flow periods than during the high-flow periods in the Lingdingyang. The result is just the opposite in Modaomen. The stratification and its increase are larger during the low-flow periods than during the high-flow periods in Lingdingyang. The response results of transport processes to sea level rise demonstrate that: (1) The time of vertical transport has pronounced increase. The increased tidal range and currents would reinforce the vertical mixing, but the increased stratification would weaken the vertical exchange. The impact of stratification changes overwhelms the impact of tidal changes. It would be more difficult for the surface water to reach the bottom. (2) The lengthways estuarine circulation would be strengthened. Both the offshore surface residual current and inshore bottom residual current will be enhanced. The whole meridional resident flow along the transect of the Lingdingyang would be weakened. These phenomena are caused by the decrease of water surface slope (WWS) and the change of static pressure with the increase of water depth under sea level rise.
- sea level rise,
- salinity,
- stratification,
- transport process,
- Zhujiang Estuary

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References(44)

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