Ground Subsidence Monitoring Using Sentinel-1 Images in Ningbo City

doi:10.13474/j.cnki.11-2246.2018.0325

Abstract

Abstract: MT-InSAR technique based on 21 Sentinel-1 images is used to research ground subsidence in Ningbo during the period of 2016-2018.The InSAR-derived results were validated by leveling surveys.The difference of displacement rates is less than 3.0 mm/a and RMSE is 1.7 mm/a.This shows that the results obtained by MT-InSAR technique agreed well with those measured by leveling.The spatiotemporal characterization of land subsidence in Ningbo is analyzed.The results show that the settlement centers in the study area are not concentrated and have a large number.The value of largest displacement rate is 22.5 mm/a with maximum settlement of 30.3 mm in Haishu.The main traffic roads,subways and railways are partly located in the subsidence area.Taking metro line 2 as an example,the characteristics of ground subsidence in Ningbo are analyzed along the rail transit.

Key words: Sentinel-1, MT-InSAR, Ningbo, ground subsidence, rail transit

CLC Number:

P258

ZHU Bangyan, LI Jiancheng, CHU Zhengwei, WANG Xiao, SUN Jingwen, YAO Fengyu. Ground Subsidence Monitoring Using Sentinel-1 Images in Ningbo City[J]. 测绘通报, 2018, 0(10): 102-106.

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