Ecological security risk assessment of underground space utilization in valley cities in cold and arid regions: A case study of Ledu District, Haidong City, Qinghai Province

YUAN Youjing; LIU Changli; PENG Hongming; WANG Xiuyan; SUN Weichao; A Huijuan; LI Nan; XU Dezhen

doi:10.12029/gc20230421001

2025 Vol. 52, No. 3

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Article navigation > Geology in China > 2025 > 52(3): 1116-1127

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YUAN Youjing, LIU Changli, PENG Hongming, WANG Xiuyan, SUN Weichao, A Huijuan, LI Nan, XU Dezhen. 2025. Ecological security risk assessment of underground space utilization in valley cities in cold and arid regions: A case study of Ledu District, Haidong City, Qinghai Province[J]. Geology in China, 52(3): 1116-1127. doi: 10.12029/gc20230421001

Citation:

YUAN Youjing, LIU Changli, PENG Hongming, WANG Xiuyan, SUN Weichao, A Huijuan, LI Nan, XU Dezhen. 2025. Ecological security risk assessment of underground space utilization in valley cities in cold and arid regions: A case study of Ledu District, Haidong City, Qinghai Province[J]. Geology in China, 52(3): 1116-1127. doi: 10.12029/gc20230421001

Ecological security risk assessment of underground space utilization in valley cities in cold and arid regions: A case study of Ledu District, Haidong City, Qinghai Province

1.
Key Lab of Geo−Environment Qinghai Province, Xining 810007, Qinghai, China
2.
Qinghai Institute of Geology and Environment Survey, Xining 810007, Qinghai, China
3.
Qinghai 906 Engineering Survey and Design Institute Co., Ltd., Xining 810007, Qinghai, China
4.
Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, Hebei, China
5.
Fujian Provincial Key Laboratory of Water Cycling and Eco−Geological Processes, Xiamen 361021, Fujian, China

Fund Project: Supported by the project of Urban Geological Survey and Evaluation on Qinghai Haidong City (No.2022012023sh003).

More Information

Author Bio: YUAN Youjing, male, born in 1988, senior engineer, mainly engaged in the investigation and research of hydrogeology, environmental geology, and geothermal geology; E-mail: 841077603@qq.com
Corresponding author: LIU Changli, male, born in 1963, researcher, mainly engaged in research on urban geology and environmental geology; E-mail: 315850110@qq.com.

Received Date: 21 April 2023

Revised Date: 09 October 2023

Publish Date: 25 May 2025

Abstract

Abstract

This paper is the result of urban geological survey engineering.
Objectives
This paper aimed at investigating solutions of eco−geological security issues caused by rising groundwater level due to the utilization of underground space in valley cities in cold and arid regions, such as soil salinization in farmland ecological zone and building damage in urban ecological zone.
Methods
On the basis of relevant data collection, geological drilling, geotechnical engineering test, pumping test and eco−geological observation were carried out. The genetic mechanism of eco−geological security risk was analyzed by using hydrogeological and other theoretical methods.
Results
The geological security risk assessment approaches for 3 types of ecosystems, including human habitation, farmland, forest−grass, were proposed, and the evaluation index system and standards were established. The eco−geological security risk in Ledu District of Haidong city were evaluated. The results showed that, under the current situation of underground space utilization, the high−risk areas were mainly distributed in mouth areas of Yinsheng Gully, Gangzi Gully, Fengdui Gully and other high−rise building urban areas influenced by groundwater; the medium−risk areas were mainly distributed in the low−lying areas of grade I and II terraces. Under the scenario of building an underground railway along the bank of Huangshui River, the high−risk and medium−risk areas would be expanded compared with the current situation of underground space.
Conclusions
The proposed three evaluation approaches for eco−geological security risk were proven to be effective. Both scenarios would induce the geological security risk for all three ecosystems, with the latter scenario posing higher risks and wider impacts. The key areas should be monitored periodically, and techniques such as groundwater drainage be used to prevent risks.
- valley−city /
- underground space utilization /
- groundwater depth /
- ecosystem function /
- eco-geological security risk assessment /
- urban geological survey engineering

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References

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