基于PS-InSAR的福建寿宁地区地表形变监测与分析

doi:10.13474/j.cnki.11-2246.2024.1219

摘要/Abstract

摘要： 福建寿宁地区地质灾害频发,严重影响该地区人民生命和财产安全。本文应用永久散射体差分干涉测量技术(PS-InSAR)对覆盖研究区2018年1月—2020年5月的100景升轨Sentinel影像进行数据处理,获取研究区形变信息和形变速率剖面曲线,标定识别出形变异常区,再结合野外调查确定6处形变靶区。结果表明,研究时段内形变速率为[-16,10]mm/a、累计形变量为[-54,34] mm、剖面平均形变速率在 [-10,5] mm/a,整体上研究区地表相对稳定,少部分区域可能存在形变;标定的6处靶区主要形变特征为滑坡、不稳定斜坡、崩塌,周边形变曲线趋势均保持一致,总体远离视线方向下沉,降水是影响形变的主要因素。研究结果可为福建寿宁地区地质灾害防治提供数据支撑和决策依据。

关键词: 福建寿宁, PS-InSAR, 形变信息, 剖面曲线, 形变靶区

Abstract: Shouning area in Fujian province is prone to geological hazards, severely affecting the lives and properties of the local residents. In this study, persistent scatterer interferometric synthetic aperture radar (PS-InSAR) technology is applied to process data from 100 ascending orbit Sentinel images covering the study area from January 2018 to May 2020. Deformation information and deformation rate profiles of the study area are obtained, identifying deformation anomalies and confirming 6 deformation targets through field investigations. The results indicate that during the study period, the deformation rate ranged from -16 to 10 mm/a, with cumulative deformation ranging from -54 to 34 mm. The average deformation rate along profiles varied from -10 to 5 mm/a. Overall, the study area's surface remains relatively stable, with deformation possibly occurring in some localized areas. The identified 6 target areas mainly exhibit deformation characteristics such as landslides, unstable slopes, and collapses, with consistent deformation trends in the surrounding areas, generally sinking away from the line of sight. Precipitation emerges as the primary factor influencing deformation. The research findings provide valuable data support and decision-making basis for geological hazard prevention and control in the Shouning area of Fujian province.

Key words: Fujian Shouning, PS-InSAR, deformation information, profile curves, deformation targets

中图分类号:

P237

张敏, 郑哲, 陈哲锋. 基于PS-InSAR的福建寿宁地区地表形变监测与分析[J]. 测绘通报, 2024, 0(12): 117-122.

ZHANG Min, ZHENG Zhe, CHEN Zhefeng. Surface deformation monitoring and analysis in Fujian Shouning area based on PS-InSAR[J]. Bulletin of Surveying and Mapping, 2024, 0(12): 117-122.

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