地面沉降是由于地表高程降低所诱发的区域环境地质灾害.城市快速发展带来的载荷的增加影响地面沉降的发展.选取覆盖北京平原区的TM遥感影像,以北京典型地下水漏斗区为研究区,在NDBI、MNDWI、SAVI指数基础上,计算遥感建筑用地指数(IBI),...地面沉降是由于地表高程降低所诱发的区域环境地质灾害.城市快速发展带来的载荷的增加影响地面沉降的发展.选取覆盖北京平原区的TM遥感影像,以北京典型地下水漏斗区为研究区,在NDBI、MNDWI、SAVI指数基础上,计算遥感建筑用地指数(IBI),获取建筑用地(载荷)时空密度差异信息;结合永久散射体干涉测量(Persistent Scatterers for SAR Interferometry,PS-InSAR)监测结果,基于GIS空间分析技术和统计分析方法,从3种不同的空间采样角度,分析载荷密度差异与地面沉降的相关性.结论显示,(1)地面沉降的不均匀性与载荷密度的正相关性表现为:沉降速率值越大,Spearman秩相关系数越大;(2)动静载荷的共同作用相对于单纯的静载荷对地面沉降的影响更明显;(3)在较短时间周期内,相对于地下水开采,载荷对地面沉降的影响较小,但仍旧是不容忽视的问题,需要长期系统性的研究.展开更多
菏泽市郓城县作为新兴的煤炭城市,是国家重要的能源基地,伴随煤炭资源开采而来的各种地质环境问题,给当地群众生产生活以及经济社会发展带来不利的影响。本文基于高精度水准测量、GPS测量和合成孔径雷达干涉测量技术获取郓城县近1000 k...菏泽市郓城县作为新兴的煤炭城市,是国家重要的能源基地,伴随煤炭资源开采而来的各种地质环境问题,给当地群众生产生活以及经济社会发展带来不利的影响。本文基于高精度水准测量、GPS测量和合成孔径雷达干涉测量技术获取郓城县近1000 km 2范围监测区煤矿开采区域2016年沉降监测数据,同时利用同时期机载LiDAR点云和山东省“十一五”1∶10000基础测绘高程点成果生成沉降等值线图,两者对比发现沉降范围和沉降结果吻合较好,监测区最大沉降量达100 mm。展开更多
Considering the joint effects of various factors such as temporal baseline, spatial baseline, thermal noise, the difference of Doppler centroid frequency and the error of data processing on the interference correlatio...Considering the joint effects of various factors such as temporal baseline, spatial baseline, thermal noise, the difference of Doppler centroid frequency and the error of data processing on the interference correlation, an optimum selection method of common master images for ground deformation monitoring based on the permanent scatterer and differential SAR interferometry (PS-DInSAR) technique is proposed, in which the joint correlation coeficient is used as the evaluation function. The principle and realization method of PS-DInSAR technology is introduced, the factors affecting the DInSAR correlation are analysed, and the joint correlation function model and its solution are presented. Finally an experiment for the optimum selection of common master images is performed by using 25 SAR images over Shanghai taken by the ERS-1/2 as test data. The results indicate that the optimum selection method for PS-DInSAR common master images is effective and reliable.展开更多
文摘地面沉降是由于地表高程降低所诱发的区域环境地质灾害.城市快速发展带来的载荷的增加影响地面沉降的发展.选取覆盖北京平原区的TM遥感影像,以北京典型地下水漏斗区为研究区,在NDBI、MNDWI、SAVI指数基础上,计算遥感建筑用地指数(IBI),获取建筑用地(载荷)时空密度差异信息;结合永久散射体干涉测量(Persistent Scatterers for SAR Interferometry,PS-InSAR)监测结果,基于GIS空间分析技术和统计分析方法,从3种不同的空间采样角度,分析载荷密度差异与地面沉降的相关性.结论显示,(1)地面沉降的不均匀性与载荷密度的正相关性表现为:沉降速率值越大,Spearman秩相关系数越大;(2)动静载荷的共同作用相对于单纯的静载荷对地面沉降的影响更明显;(3)在较短时间周期内,相对于地下水开采,载荷对地面沉降的影响较小,但仍旧是不容忽视的问题,需要长期系统性的研究.
文摘菏泽市郓城县作为新兴的煤炭城市,是国家重要的能源基地,伴随煤炭资源开采而来的各种地质环境问题,给当地群众生产生活以及经济社会发展带来不利的影响。本文基于高精度水准测量、GPS测量和合成孔径雷达干涉测量技术获取郓城县近1000 km 2范围监测区煤矿开采区域2016年沉降监测数据,同时利用同时期机载LiDAR点云和山东省“十一五”1∶10000基础测绘高程点成果生成沉降等值线图,两者对比发现沉降范围和沉降结果吻合较好,监测区最大沉降量达100 mm。
文摘Considering the joint effects of various factors such as temporal baseline, spatial baseline, thermal noise, the difference of Doppler centroid frequency and the error of data processing on the interference correlation, an optimum selection method of common master images for ground deformation monitoring based on the permanent scatterer and differential SAR interferometry (PS-DInSAR) technique is proposed, in which the joint correlation coeficient is used as the evaluation function. The principle and realization method of PS-DInSAR technology is introduced, the factors affecting the DInSAR correlation are analysed, and the joint correlation function model and its solution are presented. Finally an experiment for the optimum selection of common master images is performed by using 25 SAR images over Shanghai taken by the ERS-1/2 as test data. The results indicate that the optimum selection method for PS-DInSAR common master images is effective and reliable.