Ground Deformation over Century-long Coal Mining City Monitored through Incorporating Both PS and SBAS InSAR: A Case Study of Xuzhou

doi:10.13474/j.cnki.11-2246.2017.0013

Abstract

Abstract: The algorithm fusion of permanent scatterers interferometric SAR (PS InSAR) and small baseline subset interferometric SAR (SBAS InSAR) has become a hot spot of InSAR technology. By fusing the advantages of PS/SBAS, 128 ALOS PALSAR images (from 2007 to 2011) and 24 Radarsat-2 images (from 2012 to 2015) are used to extract the ground deformation field and trend in recent 8 years over Xuzhou region with century-long coal mining history. The experiment results demonstrate that:① From 2007 to 2011, four main subsidence areas have been found in Xuzhou, locating in Peixian County, Fengxian County, Tongshan District and Jiawang District. ② From 2012 to 2015, the subsidence range of Peixian County, Fengxian County and Tongshan District is expanding; however, the subsidence range and rate of Jiawang District decrease significantly. The phenomenon shows that the governance of mining subsidence in Jiawang District has achieved good results in recent years. In addition, there comes into apparent subsidence in Suining County. ③ The results of this experiment has been validated by the published research results on ground subsidence in Datun Center District, Peixian County. ④ The results represents the first-ever subsidence information in the recent 8 years in Xuzhou, which can be applied to monitor and control the subsidence in this area.The monitoring result is of high significance for monitoring and control, prevention and mitigation of ground subsidence disaster over the region.

Key words: differential interferometric SAR(DInSAR), coal mining city, ground deformation, Xuzhou city

CLC Number:

P237

JIANG Decai, ZHANG Jixian, ZHANG Yonghong, WU Hongan, KANG Yonghui. Ground Deformation over Century-long Coal Mining City Monitored through Incorporating Both PS and SBAS InSAR: A Case Study of Xuzhou[J]. 测绘通报, 2017, 0(1): 58-64.

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