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  • Research Article
  • Open Access

Simultaneous Observation Data of GB-SAR/PiSAR to Detect Flooding in an Urban Area

  • 1Email author,
  • 1,
  • 2,
  • 3,
  • 3 and
  • 1
EURASIP Journal on Advances in Signal Processing20092010:560512

  • Received: 1 June 2009
  • Accepted: 4 November 2009
  • Published:


We analyzed simultaneous observation data with ground-based synthetic aperture radar (GB-SAR) and airborne SAR (PiSAR) over a flood test site at which a simple house was constructed in a field. The PiSAR under flood condition was 0.9 to 3.4 dB higher than that under nonflood condition. GB-SAR gives high spatial resolution as we could identify a single scattering component and a double bounce component from the house. GB-SAR showed that the difference between the flooding and nonflooding conditions came from the double bounce scattering. We also confirm that the entropy is a sensitive parameter in the eigenvalue decomposition parameters, if the scattering process is dominated by the double bounce scattering. We conclude that and entropy are a good parameter to be used to detect flooding, not only in agricultural and forest regions, but also in urban areas. We also conclude that GB-SAR is a powerful tool to supplement satellite and airborne observation, which has a relatively low spatial resolution.


  • Urban Area
  • Information Technology
  • Quantum Information
  • Observation Data
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Authors’ Affiliations

CNEAS, Tohoku University, Sendai 980-8576, Japan
EORC/JAXA, Tsukuba 305-8505, Japan
Department of Civil Engineering, Nihon University, Narashino 275-8575, Japan


© Manabu Watanabe et al. 2010

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.