基于D-InSAR的广域滑坡变形识别应用技术研究

Research on Deformation Recognition Application Technology of Wide-area Landslide with D-InSAR

阐述D-In SAR三轨法地表变形测量技术原理及数据处理流程,提出基于滑坡变形时—空连续性特征的广域滑坡变形识别技术,并以乌东德近坝库段为例,对比分析D-In SAR技术获得的滑坡变形分布区域与现场地质调查结果、滑坡变形量与实际变形监测结果,分析表明:在植被稀少的区域,D-In SAR获得的滑坡变形范围与实际调查基本一致,但其变形量与实际变形监测结果相差较大,因此认为采用D-In SAR技术在一定范围内可以对广域滑坡变形进行识别,为快速、有针对性地现场地质调查及滑坡稳定性评价提供重要参考。

The authors introduce principle of surface deformation measurement technique and the data processing flow of three-pass D-In SAR technology,and put forward a wide-area landslide deformation recognition technology based on the feature of spatial and temporal continuity of landslide deformation. Taking the Wudongde dam-reservoir as an example,it had compared and analyzed the landslide deformation distribution area and the site geological survey results acquired from the D-In SAR technique,the deformation of landslide and the actual monitoring results of deformation. The analysis results indicate that in the area of sparse vegetation,the landslide deformation range acquired from D-InSAR is agreed to the actual survey,but the deformation varies considerably. So that the D-InSAR technology can be used to identify the wide-area landslide deformation within a certain range,which can provide an important reference on rapid and targeted field geology survey and the stability evaluation of landslide.