基于时序合并的PS-InSAR方法在雄县及周边区域地表形变监测中的应用

Application of PS-InSAR method based on time series combination in surface deformation monitoring of Xiongxian county and its surrounding areas

本文提出了一种基于时序合并的PS-InSAR(TSC-PS-InSAR)监测方法,提取雄县及周边区域地表形变信息。形变区域最大沉降速率为-79 mm/a,沉降原因为地下水超采。结果表明,TSC-PS-InSAR方法在无需先验模型的条件下,能显著提高PS目标数量,且监测结果与StaMPS方法提取的形变信息在沉降趋势及沉降量级上保持了良好的一致性,验证了本文方法在实际应用中的可靠性和可行性。

This study proposes a PS-InSAR(TSC-PS-InSAR) monitoring method based on time series combination to extract the surface deformation information of Xiongxian county and suburb areas.Evaluation experiment results indicate that the proposed method can significantly increase the number of PS targets without prior model and the monitoring results are consistent to the deformation information extracted by StaMPS method in the settlement trend and settlement magnitud,which verify the reliability and feasibility of the proposed method.In addtion,according to monitoring results,the maximum annual subsidence rate of deformation area is-79 mm/a,which may be caused by groundwater overexploitation.