木鱼包滑坡形变特征的InSAR监测分析

Monitoring Slope Displacements of Muyubao Landslide Using InSAR Analysis Technique

三峡库区地质条件复杂,问题库岸斜坡众多,滑坡灾害问题一直十分突出,需要对三峡库区的灾害隐患进行日常监测。然而常规的监测手段往往需要耗费大量的人力物力,监测效果也容易受到外界条件的限制。以三峡巴东县城长江沿岸为研究区,基于ALOS-2数据,使用PS InSAR(永久散射体干涉测量)处理技术对2016年8月—2017年10月共22景ALOS-2数据进行处理,结合水文、地质和实地调查资料对木鱼包滑坡的滑动速率和规模等变形特征做了分析。结果表明:木鱼包滑坡在监测周期内处于缓慢的蠕动变形阶段,平均形变速率为10.4 mm/a,形变的主要影响因素是库水位的变化。

The Three Gorges Reservoir area has been suffering from striking landslid disasters due to complex geological conditions and numerous slope problems,posing daily monitoring requirements.Conventional monitoring not only costs large amounts of manpower and material resources,and also is prone to be limited by external conditions.In the present research,22 views of ALOS-2 satellite data from August 2016 to October 2017 of the Yangtze River bank in Badong County as the research area were processed using PS InSAR(permanent scatterer interferometry)technology to obtain accurate regional surface deformation results.In association with hydrology,geology and field investigation,the deformation characteristics such as sliding rate and scale of Muyubao landslide were analyzed.Results manifested that in the monitoring period,the Muyubao landslide was in a slow creep deformation stage,with an average deformation rate of 10.4 mm/a.Water level fluctuation was the major influential factor of landslide deformation.