Articles | Volume 372
Proc. IAHS, 372, 305–309, 2015
https://doi.org/10.5194/piahs-372-305-2015
Proc. IAHS, 372, 305–309, 2015
https://doi.org/10.5194/piahs-372-305-2015

  12 Nov 2015

12 Nov 2015

Different scale land subsidence and ground fissure monitoring with multiple InSAR techniques over Fenwei basin, China

C. Zhao1,2, Q. Zhang1,2, C. Yang1,2, J. Zhang1,2, W. Zhu1,2, F. Qu1, and Y. Liu1 C. Zhao et al.
  • 1College of Geology Engineering and Geomatics, Chang'an University, Xian Shaanxi, China
  • 2Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, No. 126 Yanta Road, Xian, Shaanxi, China

Abstract. Fenwei basin, China, composed by several sub-basins, has been suffering severe geo-hazards in last 60 years, including large scale land subsidence and small scale ground fissure, which caused serious infrastructure damages and property losses. In this paper, we apply different InSAR techniques with different SAR data to monitor these hazards. Firstly, combined small baseline subset (SBAS) InSAR method and persistent scatterers (PS) InSAR method is used to multi-track Envisat ASAR data to retrieve the large scale land subsidence covering entire Fenwei basin, from which different land subsidence magnitudes are analyzed of different sub-basins. Secondly, PS-InSAR method is used to monitor the small scale ground fissure deformation in Yuncheng basin, where different spatial deformation gradient can be clearly discovered. Lastly, different track SAR data are contributed to retrieve two-dimensional deformation in both land subsidence and ground fissure region, Xi'an, China, which can be benefitial to explain the occurrence of ground fissure and the correlation between land subsidence and ground fissure.

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Short summary
large coverage land subsidence in Fenwei basin, China is monitored. Small scale ground fissures deformation is monitored. Two dimensional ground fissures deformation is achieved. PS-InSAR, SBAS-InSAR and 2D deformation inversion methods are employed.