Abstract
Rapid detection of flood areas in all weather conditions is needed for monitoring and mitigating flood disasters. In this paper, we investigated flood area detection using L -band synthetic aperture radar data acquired by the Phased-Array-type L -band Synthetic Aperture Radar-2 (PALSAR-2) aboard the Advanced Land Observing Satellite-2 during the 2015 heavy rainfall disaster in Kanto and Tohoku areas of Japan. This paper comprehensively compared various observation conditions of PALSAR-2, such as incidence angles, resolutions, and polarizations. We successfully detected open-water flood and built-up area flood by thresholding amplitude and interferometric coherence images. On the basis of our results, we conclude that incidence angles of approximately 20–40°, linear polarization or surface scattering component (HH, VV, and HH + VV), and high resolution are the preferable conditions for flood area detection by PALSAR-2. The optimum threshold resulted in the following flood area detection accuracies: Kappa coefficient ( κ ) = 0.583 in open water and κ = 0.429 in built-up area. These results successfully demonstrate the feasibility of rapid flood monitoring using PALSAR-2 data.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
