Long time-series of surface deformation monitoring and cause analysis in Baiyun district,Guangzhou base on SBAS-InSAR technology

doi:10.13474/j.cnki.11-2246.2023.0124

Abstract

Abstract: With the advancement urbanization, the human activities, such as ground water extraction and underground project, become increasingly intensive in cities, resulting in surface subsidence, which influences people's life. To ensure the healthy and stable development of the city, it is of great significance to carry out large-scale land subsidence monitoring in urban areas. This paper uses SBAS-InSAR technology to process 176 Sentinel-1 SAR images of Baiyun district, Guangzhou, acquired from February 2016 to March 2022, and obtains the annual average deformation rate and time-series of deformation. We analyzes the causes of deformation in the study area by combining historical optical images and field investigations. The results show that the deformation is mainly related to local geological conditions, biological and chemical degradation of garbage and human activities. The maximum deformation rate exceeds 40 mm/a, and the maximum cumulative deformation exceeds 350 mm. The research provides a reference for land subsidence monitoring and cause analysis in urban areas.

Key words: SBAS-InSAR, land deformation, Baiyun district, Sentinel-1

CLC Number:

P258

DING Wei, CHEN Zhanpeng, XU Bing, FENG Zhixiong. Long time-series of surface deformation monitoring and cause analysis in Baiyun district,Guangzhou base on SBAS-InSAR technology[J]. Bulletin of Surveying and Mapping, 2023, 0(4): 167-171.

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