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Land Subsidence Monitoring in Wuhai City Based on D-InSAR
Photonics and Electromagnetics Research Symposium (PIERS) ; : 1961-1966, 2021.
Article in English | English Web of Science | ID: covidwho-1883139
ABSTRACT
Wuhai City is an important coal resource area in Inner Mongolia Autonomous Region. High-intensity underground mining will cause large land subsidence. Differential SAR Interferometry (D-InSAR) is a popular monitoring method of land subsidence in recent years. This paper uses two-pass D-InSAR method to monitor land subsidence in Wuhai City. The experimental data selects 7 scenes of C-band Sentinel-1A images from September 2019 to March 2020. The final deformation results are shown in the Figure 3. The two-pass D-InSAR processing flow includes data focusing, baseline estimation, interferogram generation, adaptive filtering and coherence generation, phase unwrapping, orbit refining and re-flattening, deformation map generation. The result shows During the monitoring time, the most serious subsidence areas are concentrated near the mine clusters on the east and west sides of Wuhai City. Maximum settlement value up to 242 mm. The subsidence values in heavy industrial and residential areas are slightly smaller compared to the former. Settlement values are generally ranged from 56 to 87 mm. The settlement is lightest in the southern part of Hainan district. It indicates that mining can greatly accelerate surface subsidence. Meanwhile, human activities and groundwater extraction can increase subsidence. From the perspective of time, Settlement in Wuhai City is more pronounced during September to December 2019 but it decreases sharply in January 2020.This should be related to the outbreak of COVID-19. The subsidence value increased slightly from February to March 2020, which showed that the epidemic had been preliminarily controlled and people began to return to work.

Full text: Available Collection: Databases of international organizations Database: English Web of Science Language: English Journal: Photonics and Electromagnetics Research Symposium (PIERS) Year: 2021 Document Type: Article

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Full text: Available Collection: Databases of international organizations Database: English Web of Science Language: English Journal: Photonics and Electromagnetics Research Symposium (PIERS) Year: 2021 Document Type: Article