基于短基线集方法(SBAS-INSAR)技术的山区城市地面沉降监测研究——以攀枝花为例  

Research on Monitoring the Ground Subsidence in Mountainous City by SBAS-InSAR——a Case Study in Panzhihua City

作　　者：孟庆凯[1] 汪宝存[2] 苗放[1] 

机构地区：[1]成都理工大学地球物理学院空间信息技术研究所,成都610059 [2]河南省地质矿产勘查开发局测绘地理信息院,郑州450006

出　　处：《科学技术与工程》2016年第13期12-17,共6页Science Technology and Engineering

基　　金：国家自然科学基金项目(61071121);四川省地理国情监测工程中心开放基金项目(GC201501);欧洲航天局提供的数据资助

摘　　要：基于合成孔径雷达干涉(interferometric synthetic aperture radar,INSAR)技术的山区城市地面沉降研究,因地形复杂、植被覆盖等因素开展较少。首次在攀枝花市,利用12景2009-2010ENVISAT ASAR数据,采用短基线集方法开展大范围、长时间监测。结果表明,攀枝花市东区地面沉降较大,沉降的平均速率高达48 mm/年;西区沉降较小,沉降平均速率10 mm/年。推测原因多为城市化建设所致地面荷载;而市东北方向的露天矿区,因连续开采所致,不同时期同一地点的地表变化,导致高相干点在此区域分散稀疏,不能表明是否有沉降现象。The research on monitoring the ground subsidence in mountains city is relative few since the complex topography and high vegetation cover. The first research about carrying out the large scale,long time monitoring by 12 2009 - 2010 ENVISAT ASAR images in Panzhihua City was presented. The results reveal that serval subsidence region are founded in eastern areas of the city with the max linear velocity 48 mm / a,and the western areas of the city is relatived stable with the average annual subsidence velocity 10 mm / a. The probably hypothesis is because of human being＇s urbanization. However,the high coherence points were founded sparsely in the open-pit mines which was located in the northeast of city. Even the same place changes in the different periods caused by continuous mining,and some actual deformations has not been detected. Thus,the results can＇t prove the ground subsidence in the open-pit mines.

关 键 词：地面沉降 短基线集(sinall BASELINE subset SBAS) 时序分析 攀枝花 

分 类 号：P225.71[天文地球—大地测量学与测量工程]