利用Sentinel-1A数据监测抚顺市地表形变

Surface Deformation Monitoring of Fushun Using Sentinel-1A Data

针对抚顺市大范围地表形变问题,利用短基线集InSAR技术和覆盖研究区的17景降轨Sentinel-1A影像,提取抚顺市2015~2016年地表形变信息,结合信息熵分析地表不均匀形变现状,并提取典型形变区在东西向和南北向的时序剖面结果,最后利用已有文献验证该结果的可靠性。研究表明:1)2015-06~2016-06形变中心主要分布在东露天矿、西露天矿、塔峪、南花园、新屯地区;2)抚顺市的榆林街道和站前街道形变信息熵均大于1.0,地表不均匀形变极为严重,后期需重点监测;3)西露天矿北帮最大沉降量约为78 mm,东露天矿自西至东存在4个局部沉降漏斗,最大沉降量约为250 mm,塔峪北沉降区最大沉降量约为55 mm。

According to the wide range of surface deformation,seventeen descending Sentinel-1 A images are used to obtain subsidence information of Fushun from 2015 to 2016,based on the short baseline subset InSAR technique.The surface uneven deformation is analyzed using the information entropy method,and then the profile results of the typical regions in the east-west and south-north directions are extracted.Finally,the reliability of the experimental results is verified with existing.The results show that:1)From June 2015 to June 2016,the deformation centers are distributed in the Fushun east open-pit mine,Fushun west open-pit mine,Tayu,Nanhuayuan,Xintun,etc.2)The deformation information entropy of both Yulin and Zhanqian street is greater than 1.0,and the surface deformation is severely uneven,which should be monitored continually in the future.3)The maximum subsidence is about 78 mm in the north side of the Fushun west open-pit mine;four subsidence funnels formed from west to east in the Fushun east open-pit mine,and the maximum subsidence is around 250 mm;the maximum value of the north subsidence region is 55 mm in Tayu township.