International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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Volume XLII-3/W10
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-3/W10, 309–313, 2020
https://doi.org/10.5194/isprs-archives-XLII-3-W10-309-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-3/W10, 309–313, 2020
https://doi.org/10.5194/isprs-archives-XLII-3-W10-309-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  07 Feb 2020

07 Feb 2020

MONITORING AND ANALYZING THE SURFACE SUBSIDENCE IN LANGFANG BY TIME-SERIES INTERFEROMETRIC RADAR TECHNIQUE

L. Zhou1,2, X. L. Wen1, X. J. Lu1, Y. J. Shi3, J. Ma4, and D. Zhang5 L. Zhou et al.
  • 1College of Geomatics and Geoinformation, Guilin University of Technology, Guilin, China
  • 2Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University, Wuhan, China
  • 3Guangxi Deep Space Sail Engineering Survey and Design Co., LTD., Nanning, China
  • 4China Railway Siyuan Survey And Design Group Co., LTD, Wuhan, China
  • 5School of Geodesy and Geomatics, Wuhan University, Wuhan, China

Keywords: PSInSAR, surface subsidence, Langfang area, spatial-temporal analysis

Abstract. In this paper, the subsidence change maps in Langfang were obtained using ASAR images covering Langfang area acquired from August 2007 to September 2010 with the Persistent Scatterer Interferometric Synthetic Aperture Radar (PSInSAR) technique. Surface subsidence spatial-temporal characteristics in Langfang was investigated. The analysis of experimental results show that 1) prominent uneven subsidence patterns were identified in Langfang. Specifically, surface subsidence rates ranged from −77 mm/year to 4 mm/year, and maximum subsidence rate was detected in Nanjianta Town; 2) the standard deviation of the target point subsidence rates in the study area ranges from 0.8 mm/year to 9.3 mm/year, 70.4% of the monitoring point standard deviations in study area are less than 3 mm/year; 3) surface subsidence time series presented nonlinear variation trend. The surface subsidence has a tendency to gradually expand around the center of Nanjianta Town, and the scope and trend of expansion to the north and west of Langfang are more serious.