InSAR非形变信息分离方法研究——以台州地区为例

Research on InSAR non-deformation information separation method——a case study of Taizhou area

为了获取台州地区地面沉降量,该文采用粗差探测与空间滤波相结合的方法对InSAR非形变信息分离,并利用水准观测数据进行验证。结果分析表明:原InSAR与水准观测差值标准差为5.018 mm,优化后InSAR与水准观测差值标准差为1.682 mm,验证了优化方法的可靠性。对比InSAR沉降量,台州地区椒江区、路桥区、温岭市的主城区域地面缓慢抬升,可能由于台州市地下水开采控制等因素导致而成;黄岩西部山区与沿海滩涂区域地面缓慢下降,可能与矿产资源开采、填海造陆、潮汐负荷等因素有关。

In order to obtain the land subsidence in Taizhou area,this paper used the method of combining gross error detection and spatial filtering to separate the interferometric synthetic aperture radar(InSAR)non-deformable information,and leveling observation data was used to verify.The analysis of the results showed that the standard deviation of the difference between the original InSAR and the leveling observation was 5.018 mm,and after the optimization,the standard deviation of the difference between the InSAR and the leveling observation after optimization was 1.682 mm,which verified the reliability of the optimization method.By comparing the InSAR settlements,the ground slowly rose in the main urban areas of Jiaojiang district,Luqiao district,and Wenling city in Taizhou,which may be caused by factors such as the control of groundwater exploitation in Taizhou.The slow decline of the land surface in the western Huangyan mountain area and coastal tidal flat area may be related to mineral resource exploitation,sea reclamation and tidal load.