摘要
利用2017年4月—2018年12月的47景COSMO-SkyMed雷达影像,采用永久散射体合成孔径雷达干涉测量技术获得了渤海新区地表沉降信息,并基于GIS空间分析方法进一步揭示了渤海新区地表沉降的空间分布特征。根据InSAR遥感解译结果,结合渤海新区城市规划建设背景,分析了渤海新区地表沉降的分布演化态势及部分区域形变因素。结果显示,超过95.4%的PS点形变速率在区间[-9,6]mm/a内,约95%的PS点累计形变量在[-15,10]mm之间,处在沉降状态的PS点数量偏多。表明渤海新区港城区整体上基本处于稳定状态,形变较严重的地区主要集中在沿海地区和项目区西北部,填海造陆及新建建筑物地表压实等是造成区域形变的原因。
In this paper,47 COSMO-SkyMed radar images from April 2017 to December 2018 are used to obtain the surface subsid-ence information of Bohai New Area by using persistent scatterer interferometric synthetic aperture radar(PS-InSAR)technology,and the spatial distribution characteristics of land surface subsidence in Bohai New Area are further revealed based on GIS spatial analysis method.According to the results of InSAR remote sensing interpretation,combined with the urban planning and construction back-ground of Bohai New area,the distribution and evolution trend of surface subsidence and some regional deformation factors are ana-lyzed.The results show that the deformation rate of more than 95.4%of PS points is in the range of[-9,6]mm/a,and the cumula-tive deformation of about 95%of PS points is between[-15,10]mm.There are more PS points in the settlement state which shows that Bohai New area is basically in a stable state on the whole.The areas with serious deformation are mainly concentrated in the coast-al area and the northwest of the project area.The reasons for regional deformation are land reclamation and surface compaction of new buildings.
作者
唐江森
于亚杰
扈振强
TANG Jiangsen;YU Yajie;HU Zhenqiang(The 2nd Surveying and Mapping Institute of Hebei Province,Shijiazhuang 050031,China)
出处
《测绘与空间地理信息》
2024年第2期160-162,共3页
Geomatics & Spatial Information Technology
