Hydrochemical evolution of groundwater in muddy coastal zone of the northern Shandong Peninsula

FENG Chenxin; QIU Longwei; GAO Maosheng; HOU Guohua; DANG Xianzhang; SUN Qiming

doi:10.16028/j.1009-2722.2021.315

2022 Vol. 38, No. 12

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Article navigation > Marine Geology Frontiers > 2022 > 38(12): 16-25

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FENG Chenxin, QIU Longwei, GAO Maosheng, HOU Guohua, DANG Xianzhang, SUN Qiming. Hydrochemical evolution of groundwater in muddy coastal zone of the northern Shandong Peninsula[J]. Marine Geology Frontiers, 2022, 38(12): 16-25. doi: 10.16028/j.1009-2722.2021.315

Citation:

FENG Chenxin, QIU Longwei, GAO Maosheng, HOU Guohua, DANG Xianzhang, SUN Qiming. Hydrochemical evolution of groundwater in muddy coastal zone of the northern Shandong Peninsula[J]. Marine Geology Frontiers, 2022, 38(12): 16-25. doi: 10.16028/j.1009-2722.2021.315

Hydrochemical evolution of groundwater in muddy coastal zone of the northern Shandong Peninsula

1.
School of Geosciences, China University of Petroleum (East China), Qingdao 266555, China
2.
Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266237, China
3.
School of Environmental Studies, China University of Geosciences (Wuhan), Wuhan 430074, China

More Information

Corresponding author: GAO Maosheng, gms532@163.com

Received Date: 09 December 2021

Publish Date: 28 December 2022

Abstract

Abstract

The northern Shandong Peninsula is one of the typical areas of seawater (saline water) intrusion in China, with complex sedimentary environment and various types of groundwater quality. Influenced by multiple transgressions and regressions, the aquifer system is complicated by the fact that the stratum in study area is composed of cyclic interbedding of unconfined river delta sand bodies and shelf muddy deposits in a high-amplitude sea level change setting. In recent decades, excessive exploitation of groundwater by human activities has resulted in fresh depression cone and brine depression cone, which have changed the hydrodynamic conditions of local groundwater and influenced the formation and evolution of groundwater. Based on the sedimentary background and distribution characteristics of aquifers in the study area, we divided the groundwater into three basins and two layers, on which analysis and discussion were conducted in marine geology, environmental isotopes, and hydrochemistry. Results show that there are obvious regional differences in the evolution of shallow groundwater, Mihe River and Bailang River are mainly recharged by precipitation, and the depression cone is dominated by Cl-Ca water, reflecting groundwater salinization. Weihe River is mainly recharged by runoff, and the depression cone is dominated by HCO₃·Cl-Na water, indicating groundwater desalination. Therefore, the formation of saline and brine in deep groundwater of the study area is mainly controlled by mixing among fresh water, seawater, and brine.
- brine /
- three-endmember mixing /
- groundwater evolution /
- hydrochemistry /
- Shandong Peninsula /
- muddy coastal zone

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References

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