测绘通报 ›› 2019, Vol. 0 ›› Issue (3): 76-80.doi: 10.13474/j.cnki.11-2246.2019.0082

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Application of new FMCW ground-based SAR and three-dimensional laser scanner in dam deformation monitoring

LIU Longlong1,2,3, ZHANG Jixian4, WANG Shijie1,2, ZHAO Zheng3   

  1. 1. Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, China;
    2. Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Lanzhou 730070, China;
    3. Chinese Academy of Surveying & Mapping, Beijing 100830, China;
    4. National Quality Inspection and Testing Center for Surveying and Mapping Products, Beijing 100830, China
  • Received:2018-04-03 Online:2019-03-25 Published:2019-04-02

Abstract: In order to solve the disadvantages of traditional dam deformation monitoring method,including only getting point deformation information,high monitoring costs and significant environmental impact,this study introduces a new monitoring technology for ground based synthetic aperture radar (GBSAR).The low visibility of radar data can be solved by the combination of high-precision two-dimensional deformation map obtained by Fast-GBSAR and DEM generated by three-dimensional laser scanner.Through monitoring of a domestic dam and in-depth analysis of deformation reasons using this technology,we propose that the tide in the reservoir area has a cyclical effect on the horizontal deformation of the dam.The result indicates that the high-precision dam deformation information can be obtained by Fast-GBSAR.In this study,a three-dimensional monitoring method with intuitive,efficient and high-precision is established,combined with three-dimensional visualization technology,and it provides reliable support for dam deformation monitoring.

Key words: ground-based synthetic aperture Radar, frequency modulated continuous wave, dam deformation monitoring

CLC Number: