Investigation on Seasonal Water Area Change in Lake Sakata Based on POLSAR Image Analysis(Sensing,<Special Section>2006 International Symposium on Antennas and Propagation)

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概要

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• This paper examines seasonal change of the true water area of Lake "Sakata" by using Polarimetric Synthetic Aperture Radar (POLSAR) image analysis. The true water area includes not only the body of water but also the water area under emerged-plants and/or floating-leave plants in the lake. Statistical POLSAR image analysis is carried out for both X- and L-band data, based on the three-component scattering power decomposition method, where the decomposed components are surface scattering, double-bounce scattering and volume scattering components. From the results of the image analysis for the L-band POLSAR data acquired by Pi-SAR system, it is found that strong double-bounce scattering can be observed at the vicinity of the boundary region between water area and the surrounding emerged-plants area in early and middle summer. This phenomenon is an important factor for environmental monitoring. To verify the generating mechanism of the double-bounce scattering, the Finite-Difference Time-Domain (FDTD) polarimetric scattering analysis is also executed for a simplified boundary model, which simulates the local boundary region around the lake and consists of lots of vertical thin dielectric pillars on a perfect electric conductor (PEC) plate or on a PEC and dielectric hybrid plate. Taking into account the polarimetric feature of the double-bounce scattering obtained by both the FDTD and POLSAR image analyses, one can distinguish the actual water area from the bush of the emerged-plants around the lake, even when the water area is concealed by emerged-plants and/or floating-leave plants. Consequently, it is found that by using the proposed approach, one can estimate the true water area seasonal change for the lake and the surrounding wetland.

• 社団法人電子情報通信学会の論文
• 2007-09-01

著者

• YAMAGUCHI Yoshio

  Department of Cardiology, Fukuoka University School of Medicine

• Yamaguchi Yoshio

  Faculty of Engineering, Niigata University

• SATO Ryoichi

  Faculty of Education, Niigata University

• YAMADA Hiroyoshi

  Faculty of Engineering, Niigata University

• Sato Ryoichi

  Faculty Of Education Niigata University

• Yamaguchi Yoshio

  Faculty Of Engineering Niigata University

• Sato Ryoichi

  Niigata Univ. Niigata‐shi Jpn

• YAMADA Hiroyoshi

  Department of Information Engineering, Niigata University

• Yamada Hiroyoshi

  Faculty Of Engineering Niigata University

• Yamaguchi Yoshio

  Department Of Cardiology Kanazawa Medical University School Of Medicine

• Yajima Yuki

  Faculty Of Engineering Niigata University

• Yamada Hiroyoshi

  Niigata Univ. Niigata Jpn

• Yamaguchi Yoshio

  Department Of Information Engineering Niigata University

• YAJIMA Yuki

  Graduate School of Science and Technology, Niigata University

• Yamada Hiroyoshi

  Department Of Information Engineering Niigata University

• Yamaguchi Yoshio

  Department Of Cardiology Fukuoka University School Of Medicine

• Yamaguchi Yoshio

  Department of Applied Chemistry, Faculty of Technology, Tokyo University of Agriculture and Technology

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