Monitoring Regional Surface Subsidence of Ningdong Coal Base by DinSAR

CHENG Xia; WANG Hui; WANG Guorui; DU Lingtong; WEI Caiyong; ZHOU Feng

doi:10.12401/j.nwg.2023056

Northwestern Geology > 2023 > 56(6): 369-375. > DOI: 10.12401/j.nwg.2023056

CHENG Xia, WANG Hui, WANG Guorui, et al. Monitoring Regional Surface Subsidence of Ningdong Coal Base by DinSAR[J]. Northwestern Geology, 2023, 56(6): 369-375. DOI: 10.12401/j.nwg.2023056

Citation:

CHENG Xia, WANG Hui, WANG Guorui, et al. Monitoring Regional Surface Subsidence of Ningdong Coal Base by DinSAR[J]. Northwestern Geology, 2023, 56(6): 369-375. DOI: 10.12401/j.nwg.2023056

Citation:

CHENG Xia, WANG Hui, WANG Guorui, et al. Monitoring Regional Surface Subsidence of Ningdong Coal Base by DinSAR[J]. Northwestern Geology, 2023, 56(6): 369-375. DOI: 10.12401/j.nwg.2023056

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Monitoring Regional Surface Subsidence of Ningdong Coal Base by DinSAR

1.
Ningxia Survey and Monitor Institute of Land and Resources, Yinchuan 750002, Ningxia, China
2.
Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China, Ningxia University, Yinchuan 750021, Ningxia,China
3.
School of Ecological and Environment, Ningxia University, Yinchuan 750021, Ningxia, China
4.
Ningxia Instituteof Remote Sensing Survey, Yinchuan 750021, Ningxia, China
5.
Ningxia Institute of Geological and Mineral Resources Survey, Yinchuan 750021, Ningxia, China

More Information

Received Date: December 11, 2022
Revised Date: January 28, 2023
Accepted Date: February 26, 2023
Available Online: April 09, 2023

Graphical Abstract

Abstract

Abstract

The exploitation of Ningdong coal base has become an important engine for industrial economic development in Ningxia. Surface subsidence, which caused by coal mining has become the main geological environmental problem in the area. This study monitored regional surface subsidence characteristics of Ningdong coal base by utilizing Differential Interferometry Synthetic Aperture Radar (DinSAR) and Sentinel-1A dataset from 2015 to 2019. The results indicated that the characteristics of subsidence vary widely in different regions and years, subsidence in the north is larger than that in the south, which maximum reached 0.13 m. In the past four years, the subsidence from 2015 to 2016 is most serious and however its from 2016 to 2017 is lest. During 2015～2019, the area with subsidence value more than 0.1 m were 578 km². The subsidence area is consistent with the mining activity area, which means that the surface subsidence is mainly caused by coal mining. Other slight surface subsidence, on the one hand, could caused by coherent distortion of radar image and be related to the surface deformation such as wind-sand erosion on the other hand. DinSAR technique has distinct advantage in monitoring large-scale land subsidence, but there is a loss of coherent phenomenon due to the long time baseline.
- surface subsidence,
- DinSAR,
- coal base,
- deformation monitoring,
- Ningdong

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References (15)

References

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