Land subsidence monitoring in Binhai New Area based on time-series InSAR technology
In view of the shortcomings of traditional land subsidence measurement methods such as long time consumption and poor timeliness in a wide range of measurement areas,this paper used Sentinel-1A image data covering Binhai New Area in Tianjin from 2017 to 2021 and adopted persistent scatterer interferometric synthetic aperture radar (PS-InSAR) and small baseline subset interferometric synthetic aperture radar (SBAS-InSAR) to obtain land subsidence data. The spatio-temporal analysis of land surface deformation information determined the influence of various factors on land subsidence,and the reliability of the results was cross-verified. The analysis results show that the land subsidence in Binhai New Area in Tianjin is affected by precipitation,quaternary strata thickness,groundwater,and other factors. Among them,there is land subsidence in Binhai New Area in Tianjin from 2017 to 2021,with a maximum subsidence rate of-130 mm/a,a maximum lifting rate of 40 mm/a,and a maximum cumulative subsidence of-411 mm. The key subsidence areas are mainly distributed in the junction area of Yangjiabo Town and Zhaishang Street in the northeast and near Zhongtang Town and Beidagang Reservoir in the southwest.
万方数据
维普
