Karst hydrogeological survey and tracing of Zhangyukeng phosphogypsum repository

ZHAO Zhihao; WANG Kongwei; ZHOU Zhun; LIU Shiyuan; ZHANG Kaiyuan; WANG Lan

doi:10.11932/karst2023y017

Volume 42 Issue 3

Jun. 2023

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Article Navigation > CARSOLOGICA SINICA > 2023 > 42(3): 413-424

ZHAO Zhihao, WANG Kongwei, ZHOU Zhun, LIU Shiyuan, ZHANG Kaiyuan, WANG Lan. Karst hydrogeological survey and tracing of Zhangyukeng phosphogypsum repository[J]. CARSOLOGICA SINICA, 2023, 42(3): 413-424. doi: 10.11932/karst2023y017

Citation:

ZHAO Zhihao, WANG Kongwei, ZHOU Zhun, LIU Shiyuan, ZHANG Kaiyuan, WANG Lan. Karst hydrogeological survey and tracing of Zhangyukeng phosphogypsum repository[J]. CARSOLOGICA SINICA, 2023, 42(3): 413-424. doi: 10.11932/karst2023y017

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Karst hydrogeological survey and tracing of Zhangyukeng phosphogypsum repository

doi: 10.11932/karst2023y017

ZHAO Zhihao^{1, 2
,},
WANG Kongwei^{1, 2
,
,},
ZHOU Zhun^{1, 2},
LIU Shiyuan^{1, 2},
ZHANG Kaiyuan^{1, 2},
WANG Lan^{1, 2}

1.
Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of Education, Yichang, Hubei 443002, China
2.
College of Civil Engineering and Architecture, Three Gorges University, Yichang, Hubei 443002, China

Received Date: 2022-06-06
Available Online: 2023-04-10

Abstract

Abstract

The most effective treatment of phosphogypsum—the waste generated in the production of phosphoric acid—is centralized landfill. Given the stability of phosphogypsum landfill and possible pollution to groundwater, Zhangyukeng phosphogypsum repository, a typical phosphogypsum landfill site, should be established in accordance with strict requirements on the geological environment. In this study, based on the field geological survey, observation of drilling cores and interpretation of geophysical profiles, the tracer evaluation technology was used to evaluate karst development and to analyze characteristics of karst water runoff and discharge in the study area. The following conclusions are drawn as follows. Firstly, the gullies where Zhangyukeng phosphogypsum repository is located have no hydraulic connection with the adjacent valley; therefore, there will be no groundwater leakage to the adjacent valley. Secondly, NE karst pipelines control the runoff and discharge of karst water in Zhangyukeng area. The discharge channel is unique and the geological point (D5) is the contact-type descending spring existing in this area—the discharge channel of karst groundwater. Thirdly, the tracer curve is a unimodal one with trailing characteristics, and the type of underground karst pipeline is single with relatively simple structures, which shows that the underground karst in the experimental area is developed and there is a main path channel with smooth flow between two geological points from D2 to D5. In conclusion, from the perspective of hydrogeological conditions, the building of a phosphogypsum landfill should meet the requirements that there exists a relatively independent underground geological unit without the hydraulic connection with the adjacent valley, and the discharge channel is single and clear. The karst hydrogeological conditions of Zhangyukeng phosphogypsum repository basically satisfy the above requirements and meet the hydrogeological conditions for its construction.
- Zhangyukeng phosphogypsum repository,
- hydrogeological conditions,
- groundwater,
- tracer test

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References(14)

References

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Karst hydrogeological survey and tracing of Zhangyukeng phosphogypsum repository

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