基于InSAR技术的滑坡灾害监测

摘要

分析InSAR技术监测滑坡灾害存在的技术难点,提出采用L波段的高分辨率PALSAR雷达数据,基于雷达干涉测量技术及多源观测数据,对滑坡地质灾害进行综合监测.以北京房山区史家营滑坡为实验区,选取2008-2010年7景ALOS PALSAR雷达数据,通过分析时空基线构建4个干涉对,分别获取了不同时段的滑坡分布及滑坡位移,并对滑坡位移及相干图进行分析.试验证明基于雷达干涉测量技术联合多源观测数据是进行滑坡地质灾害定量监测的最有效的手段之一.%According to the problems in the landslides monitoring using InSAR technique in practical applications,the research was carried out to monitor the landslides based on InSAR technique and multi-source observations data.It monitored the landslides comprehensively using high-resolution PALSAR data and multi-source observations data on the basis of the method of radar interferometry.The landslides in Shijiaying which located in Fangshan region of Beijing were selected as the test area.Then it selected 7 PALSAR images during 2008 to 2010 to build 4 InSAR pairs.The monitoring precision can be achieved to 1 cm.The result proved that InSAR technique combined multi-source observations data is a powerful and effective tool to measure surface deformation and study landslides.