基于D-InSAR技术的汶川县地表形变监测与潜在泥石流灾害隐患分析  

Surface Deformation Monitoring and Potential Debris Flow Hazard Analysis in Wenchuan County Based on D-InSAR Technology

作　　者：陈跨越 王保云 CHEN KuayueWANG Baoyun(School of Mathematics,Yunnan Normal University,Kunming 650500;Yunnan Key Laboratory of Modern Analytical Mathematics and Applications,Kunming 650500)

机构地区：[1]云南师范大学数学学院,昆明650500 [2]云南省现代分析数学及应用重点实验室,昆明650500

出　　处：《四川地质学报》2025年第1期116-124,共9页Acta Geologica Sichuan

基　　金：基于深度迁移学习的遥感影像中泥石流孕灾沟谷识别——以云南省为例(国家自然科学基金,61966040);基于时序InSAR技术和改进Elman神经网络的高山峡谷区地表形变预测分析(云南师范大学研究生科研训练项目基金,YJSJJ23-B69)。

摘　　要：针对“5·12”大地震为汶川县内沟谷提供了充足的松散固体物质,使该县易形成滑坡、泥石流等自然灾害问题,提出利用合成孔径雷达差分干涉测量(differential interferometric synthetic aperture radar, D-InSAR)技术对汶川县地表进行形变监测与潜在泥石流灾害隐患分析。通过利用D-InSAR技术监测汶川县地表形变,根据地表形变结果与高程等6个地形因子开展统计研究,并以绵虒镇板子沟作为典型泥石流潜在风险区域进行深入研究。实验结果表明,通过融合D-InSAR技术和光学图像,成功检测出18处泥石流灾害隐患点,其中最大的形变达到了21.72 cm,并且分析出隐患点与高程等地形因子有强相关性;通过对板子沟的分析,发现在高程落差大、坡面多分布于阳坡、植被覆盖度和地表粗糙度低的沟谷,易发生泥石流灾害。In view of the"May 12"earthquake provided sufficient loose solid materials for the gullies in Wenchuan County,which made the county prone to natural disasters such as landslides and debris flows.differential interferometric synthetic aperture radar(D-InSAR)technology is used to monitor surface deformation and analyze potential debris flow hazards in Wenchuan County.By using D-InSAR technology to monitor the surface deformation in Wenchuan County,a statistical study was carried out according to the surface deformation results and 6 topographic factors such as elevation,and Banzigou in Miansi town was taken as a typical potential risk area for debris flow.The experimental results show that 18 hidden points of debris flow disaster have been successfully detected through the fusion of D-InSAR technology and optical images,among which the largest deformation reaches 21.72 cm,and it is analyzed that the hidden points are strongly correlated with terrain factors such as elevation.Through the analysis of Banzi gully,it is found that the gully with large elevation drop,mostly distributed on sunny slope,low vegetation coverage and surface roughness is prone to debris flow disaster.

关 键 词：合成孔径雷达差分干涉测量 地表形变 形变监测 泥石流 自然灾害 

分 类 号：P237[天文地球—摄影测量与遥感]