京津冀地区1992—2014年三阶段地面沉降InSAR监测

发布时间：2018-05-29 17:32

本文选题：地面沉降 + InSAR　；参考：《测绘学报》2016年09期

【摘要】：京津冀地区是我国地面沉降灾害发育最严重的地区,几乎每年都造成巨大的经济损失。本文提出了改进的时间序列InS AR技术——多主影像相干目标小基线干涉技术(MCTSB-InS AR),利用4颗卫星摄取的3个时段的时间序列SAR影像:ERS-1/2 SAR(1992—2000年)、ENVISAT ASAR(2003—2010年)、RADARSAT-2(2012—2014年),获取了京津冀地区1992—2014年间3个时段的地面沉降信息。经与京津两地120个以上水准测量数据进行比较,3个时段的地表监测结果的精度分别为8.7、4.7、5.4 mm/a。分析了北京和天津两市22年间地面沉降的时空变化特征,其中北京市地面沉降呈不断加重趋势;天津市地面沉降在1992—2010年间发展迅猛,在2010年以后有所减缓。同时,本文也表明MCTSB-In SAR技术是有效可靠的,在大区域地面沉降监测中具有推广应用价值。
[Abstract]:The Beijing-Tianjin-Hebei region is the most developed area of land subsidence disaster in China, which causes huge economic losses almost every year. In this paper, an improved time series InS AR technique, a small baseline interference technique for coherent targets in multiple main images, is presented. The SAR images of three time periods taken by four satellites are used to measure the time series of SAR images: ERS-1 / 2 SAR(1992-2000. The year of RADARSAT-2T is 2012-2014. The land subsidence information of three periods from 1992 to 2014 in Beijing-Tianjin-Hebei region was obtained. Compared with more than 120 leveling data in Beijing and Tianjin, the accuracy of the surface monitoring results in the three periods is 8.7 / 4.7 / 5.4 mm / a, respectively. The temporal and spatial characteristics of land subsidence in Beijing and Tianjin during 22 years are analyzed. The ground subsidence in Beijing is increasing, and the land subsidence in Tianjin is developing rapidly from 1992 to 2010, which has slowed down since 2010. At the same time, this paper also shows that the MCTSB-In SAR technology is effective and reliable, and has the value of popularization and application in the monitoring of land subsidence in large area.
【作者单位】：中国测绘科学研究院;
【基金】：国家973计划课题(2012CB719905) 国家自然科学基金(41271430;41304010) 国家测绘地理信息局全国地理国情监测项目~~
【分类号】：P642.26

【相似文献】