11 Natural Hazards, Catastrophes, and Risk Mitigation (Posters)

Monday, 5 September 2011
8:30 AM - 6:00 PM
Poster Hall P1 (E110, Senatsraum, 1st floor)

ALOS/PALSAR OBSERVATIONS FOR FLOODING AREA BY TSUMANIS - JAPAN TOUHOKU EARTHQUAKE

Paper number: 11-3
Program: Theme Sessions
Time: 8:30 AM – 6:00 PM

Authors

  • Noriyuki Kawano Presenting Author
    Earth Observation Research Center (EORC), Tsukuba, N/A

Abstract

A terrible earthquake with 9.0 magnitude struck on Touhoku area, Japan at 14:46 (local time) on 11 March 2011, big tsunamis attacked about 20 - 60 minutes later to the Touhoku area, which reached 6 - 7 km away from coasts at most. Tsunamis caused huge damage along the coast, and flooding area by Tsunamis remained for about 2 weeks at longest.

Phased array type L-band Synthetic Aperture Radar (PALSAR) boarded on Advanced Land Observing Satellite (ALOS) operated by Japan Aerospace Exploration Agency (JAXA) made emergency observations on 13, 14, 16, 17, 18, 19, and 21 March. Comparison these "post disaster" images with "pre disaster", sigma-naught of post disaster in such flooding area is generally smaller than those of pre disaster due to flooding.

This presentation will discuss effective algorithm to estimate flooding area and show variations of flooding area.