Comparative Analysis of Urban Land Subsidence Leveling and InSAR Monitoring
This paper expounds the applicability of leveling and InSAR monitoring in urban land subsidence monitoring,analyzes the mathematical models of single-point calculation and quasi-stable datum calculation for subsidence in the adjust-ment of land subsidence leveling data,and proposes multi-phase leveling results and InSAR Comparative analysis meth-od of monitoring results. Taking Hangzhou City as an exam-ple,using the first and second level observation data of the five phases of 2014,2017,2019,2020 and 2021 and the four phases of InSAR monitoring data of 2015-2017,2017-2019,2017-2020 and 2019-2021,the research found that The use of quasi-stable datums in the adjustment of land subsidence level-ing data is more conducive to the analysis and research of sub-sidence. A large number of leveling results and InSAR moni-toring results verify that the data sets have an obvious linear relationship. The overall performance of the interpretation is consistent,and the agreement is fine. The construction idea of effectively integrating the two technical methods can pro-vide a scientific decision-making basis for the planning of new first-tier cities and monitoring of land subsidence.
urban land subsidencemulti-phase levelingInSAR monitoringcomparative analysisreference datum
万方数据
维普
