Analysis on the change trend and influencing factors of seawater intrusion in Shenzhen from 2017 to 2022

CHEN Beichen; LI Qinglan; WANG Zhengyang; ZHANG Hongyan; LI Wenbo; CHENG Jingqing; WANG Xiao

doi:10.16028/j.1009-2722.2023.003

2024 Vol. 40, No. 1

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Article navigation > Marine Geology Frontiers > 2024 > 40(1): 55-64

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CHEN Beichen, LI Qinglan, WANG Zhengyang, ZHANG Hongyan, LI Wenbo, CHENG Jingqing, WANG Xiao. Analysis on the change trend and influencing factors of seawater intrusion in Shenzhen from 2017 to 2022[J]. Marine Geology Frontiers, 2024, 40(1): 55-64. doi: 10.16028/j.1009-2722.2023.003

Citation:

CHEN Beichen, LI Qinglan, WANG Zhengyang, ZHANG Hongyan, LI Wenbo, CHENG Jingqing, WANG Xiao. Analysis on the change trend and influencing factors of seawater intrusion in Shenzhen from 2017 to 2022[J]. Marine Geology Frontiers, 2024, 40(1): 55-64. doi: 10.16028/j.1009-2722.2023.003

Analysis on the change trend and influencing factors of seawater intrusion in Shenzhen from 2017 to 2022

1.
Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
2.
Shenzhen Natural Resources and RealEstate Assessment and Development Research Center, Shenzhen 518040, China
3.
College of Oceanography, China University of Geosciences (Wuhan), Wuhan 430074, China
4.
Shenzhen Branch of CNOOC (China) Ltd., Shenzhen 518054, China

More Information

Corresponding author: LI Qinglan, ql.li@siat.ac.cn

Received Date: 04 January 2023

Publish Date: 28 January 2024

Abstract

Abstract

Based on the data of 25 monitoring wells on seawater intrusion in Shenzhen, from 2017 to 2022, and using Cl⁻ concentration as the evaluation index, the spatial distribution and variation trend of seawater intrusion in Shenzhen were analyzed. Results show that the buried groundwater layer in Shenzhen is relatively shallow, and the change of water level elevation was relatively stable. Seawater intrusion was detected mainly in the Shajing area of Bao’an, the central area of Nanshan, the Yantian Free Trade Zone, and the mouth of the Kwai Chung River in Dapeng. Meanwhile, the factors including regional geology, rock and soil types, resistivity geophysical prospecting, rainfall changes, and human activities were considered, and results show that the exploitation of groundwater is an important factor causing seawater intrusion. The Quaternary faults are potential channels for seawater intrusion. The land reclamation area is vulnerable to seawater intrusion. The correlation between rainfall and seawater intrusion is small. This study provided a reference for the disaster prevention of seawater intrusion in Shenzhen.
- seawater intrusion /
- groundwater /
- chloride concentration /
- rainfall /
- Shenzhen

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References

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