基于时序InSAR技术的新磨村滑坡发生前后变形研究

基于时序InSAR技术,并结合现场调查,采用新磨村滑坡发生前30景SAR数据和滑坡发生后36景SAR数据对滑坡及周边区域形变进行监测,结果表明:①新磨村滑坡发生前,坡脚未探测到明显的变形,但滑源区有明显的变形迹象,主要变形发生2016年和2017年,滑源区坡体经历了“缓慢变形-加速-暂时稳定-再加速-滑坡发生”过程;②新磨村滑坡发生后,在坡脚堆积区东南部形成一个不稳定变形体,累积变形量较大,雨季有加快变形趋势,尚未达到稳定状态;③根据新磨村滑坡前、后变形规律,滑坡发生前、后地表变形受降雨影响明显。

Research on Deformation of Xinmo Village Landslide before and after Occurrence Based on the Time-series InSAR

This paper uses the 30 SAR data before the occurrence of the Xinmo landslide and 36 SAR data after landslide occurred to monitor of landslide and surrounding area deformation. The results show:①Before the occurrence of the Xinmo landslide, no obvious deformation was detected at the foot of the slope, but the source area showed obvious signs of deformation.The main deformation occurred in 2016 and 2017,the source area experienced the process of ”slow deformation-acceleration-temporary stabilization-re-acceleration”.②After the occurrence of the Xinmo landslide, an unstable deformation area is formed in the southeastern part of the accumulation area. Its cumulative deformation is large. The rainy season has a tendency to accelerate deformation.It has not yet reached steady state.③Analyzing the deformation law before and after the Xinmo Village landslide, the surface deformation is obviously affected by the rainy season rainfall.