Surface deformation and monitoring geodetic detection mechanism in Liuku street based on ascending and descending SAR data

doi:10.13474/j.cnki.11-2246.2024.1205

Abstract

Abstract: Surface deformation, a common geological hazard, frequently triggers landslides and debris flow disasters in complex mountainous terrain, posing a long-term threat to personal and property safety. However, the effective prevention of surface deformation remains challenging due to the lack of comprehensive monitoring and quantitative analysis of its driving factors. To accurately identify the dominant factors of surface deformation in mountainous areas, this study uses InSAR technology with ascending and descending orbit SAR datasets to determine the spatiotemporal distribution of surface deformation in Liuku county, Yunnan province, from January 2016 to February 2022. After verifying the reliability of the monitoring results, a geographic detector quantifies the contributions of driving factors and reveals their interactive mechanisms. The research results show that:①Surface deformation in Liuku county is primarily subsidence, mainly concentrated in the main urban area, with deformation rates ranging from -44 to 30 mm/a. ②Rainfall, elevation, and soil type have a strong spatial correlation with surface deformation in the study area, and interactions among driving factors enhance this spatial correlation. ③Deformation in the main urban area is primarily characterized by vertical subsidence, while horizontal deformation occurs in Lijiatian and Damikou village.

Key words: SBAS, PS, time series InSAR, geographical detector, deformation monitoring

CLC Number:

P237

YU Wenxuan, LI Yimin, JI Peikun, MA Enhua, Lü Shengbin. Surface deformation and monitoring geodetic detection mechanism in Liuku street based on ascending and descending SAR data[J]. Bulletin of Surveying and Mapping, 2024, 0(12): 24-32.

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