D-InSAR沉降监测与城市新增建设用地相关度研究  

Correlation Analysis of D-InSAR Subsidence Monitoring and the Increased Urban Construction Land

作　　者：雷帆[1] 陶青山[1] 杨凯钧[1] 曹里[1] 曾海波[1] LEI Fan

机构地区：[1]湖南省国土资源规划院,湖南长沙5470710

出　　处：《地理空间信息》2019年第2期93-95,125,共4页Geospatial Information

基　　金：国家自然科学基金资助项目(41374033)

摘　　要：以3 m级Terra SAR卫星数据为例,对广西省南宁市主城区进行D-In SAR干涉测量,并结合同期土地资源全天候建设用地监测成果进行相关度分析。结果表明,主城区有两个较大的沉降漏斗,沉降趋势由城区向郊区减缓,一定程度上表明该地区的沉降并非自然地壳运动形成。进一步研究表明,高沉降漏斗区域的地下水开采及矿产开采较为严重,并且建设用地与沉降结果整体相关系数达到了0.78,建设密集区域均伴随着不同程度的沉降。根据该区域D-In SAR沉降结果,城市建设应向高稳定性、低沉降区域进行。Taking Nanning City for example,we used 3 m level TerraSAR data to construct the subsidence model by D-InSAR interferometry,and compared with the land use change remote sensing survey database at the same measure time to have a correlation analysis between subsidence and the change of urban construction land.The results show that the integral correlation coefficient achieves 0.78 between subsidence and the change of urban construction land,and the major construction area and the high density construction area are with severe land subsidence.In addition,the correlation coefficient increased from the main city to the suburbs,which indicates that some of the main city cause permanent settlement and are difficult to recover.Some area subsidence caused by long-term mining or other natural factors have no strong correlation with the change of urban construction land.Therefore,according to the results of D-InSAR subsidence monitoring,urban construction should be directed to areas with high stability and low settlement.

关 键 词：D-INSAR 沉降 干涉测量 相关度 

分 类 号：P237[天文地球—摄影测量与遥感]