摘要
选取深圳长岭陂水库土石坝为研究对象,收集了该区域22景升轨TerraSAR-X和28景降轨COSMO-SkyMed雷达影像,采用融合永久散射体和同分布散射体的多时相InSAR(Multi-temporal InSAR,MT-InSAR)技术,获取了坝体加高后由于自重和内部填土材料的固结效应产生的变形场。对比分析了两种SAR卫星数据源在不同升降轨条件下的雷达视线方向变形监测结果,两种结果存在差异的原因主要来源于雷达卫星视角的变化和透视收缩。分析了升降轨InSAR监测结果与同期水准测量结果,显示两者具有较高的一致性,也表明本文提出的融合计算方法有较好的适用性。
Interferometric synthetic aperture radar(InSAR)technology could provide deformation-monitoring results with high spatial-temporal resolution and has the potential of monitoring dams’full lifecycle deformation.Ascending TerraSAR-X and descending COSMO-SkyMed data between July 2011 and June 2012 and multi-temporal InSAR(MT-InSAR)technology combing persistent scatterers(PS)and distributed scatterers(DS)are used to deal with the SAR images.This paper finds that the main dam of Chang lingpi reservoir has differential settlements during the first storing-up period.And it is possible to be related to the compaction of backfilled soil.The experimental results are validated with leveling data and show that the InSAR resultsare in consistent with the traditional survey and the results of this paper are of high reliability.
作者
熊寻安
王明洲
龚春龙
XIONG Xun’an;WANG Mingzhou;GONG Chunlong(Shenzhen Water Planning and Design Institute Co.,Ltd.,Shenzhen518000,China;Shenzhen Water Science and Technology Development Co.,Ltd.,Shenzhen518000,China)
出处
《测绘地理信息》
2019年第5期78-81,共4页
Journal of Geomatics
基金
中华人民共和国水利部公益性行业科研专项(201401072)
关键词
MT-InSAR
水库土石坝
表面变形
永久散射体
同分布散射体
MT-InSAR
reservoir earth rock-filled dam
surface deformation
persistent scatterers
distributed scatterers
