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Seasonal deformation monitoring of the northern Yellow River Delta based on InSAR technology

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Abstract

Due to overexploitation of natural resources in the northern Yellow River Delta and the resulting land subsidence, interferometric synthetic aperture radar (InSAR) technology is utilized to analyze the deformation trend. Based on Advanced Land Observation Satellite PHASE Array Type L-band Synthetic Aperture Radar and Sentinel-1 data, this paper obtains the annual subsidence rate in two time periods (2007–2010 and 2017–2020) and verifies the correctness by comparing the ascending and descending orbit results. Subsequently, the 11 deformation interference pairs of the three-month interval are extracted to analyze the time series displacement of deformation areas. The results show that there are three large-scale subsidence areas with maximum annual subsidence of 250 mm, all of which are located in the oil or brine exploitation areas, and each deformation area displays a larger linear rate from January to May and then displays different nonlinear deformation from June to December.

© 2021 Optical Society of America

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Data Availability

Data underlying the results presented in this paper are available in Refs. [44,45].

44. NASA, “EARTHDATA,” National Aeronautics and Space Administration (2021), https://urs.earthdata.nasa.gov/.

45. JAXA, “Earth Observation Research Center,” Japan Aerospace Exploration Agency (2021), https://www.eorc.jaxa.jp/.

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