Extraction of temporal change on tsunami damaged agricultural field by the 2011 tohoku earthquake using terrasar-x data

Chinatsu Yonezawa, Manabu Watanabe, Genya Saito

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We analyzed backscattering characteristics from TerraSAR-X data to observe changes occurring in agricultural fields damaged by a tsunami that was caused by the 2011 Tohoku earthquake. We used these data to extracted information about the drying process following flooding by this tsunami. Twenty time series datasets were computed, ranging from the day after the disaster to six months later. Flooded agricultural fields show lower backscattering coefficients than non-flooded areas. The results showed that some agricultural fields were flooded for more than three months. Backscattering coefficients are affected by incidence angle, yet temporal changes were clearly extracted from the backscattering coefficients of datasets with the same observation direction and incidence angle. The average difference between the mean backscattering coefficients of areas of agricultural field affected by the tsunami and those of areas not touched by the tsunami was seen to generally decrease with time.

Original languageEnglish
Title of host publication34th Asian Conference on Remote Sensing 2013, ACRS 2013
PublisherAsian Association on Remote Sensing
Pages3723-3729
Number of pages7
ISBN (Print)9781629939100
Publication statusPublished - 2013 Jan 1
Event34th Asian Conference on Remote Sensing 2013, ACRS 2013 - Bali, Indonesia
Duration: 2013 Oct 202013 Oct 24

Publication series

Name34th Asian Conference on Remote Sensing 2013, ACRS 2013
Volume4

Other

Other34th Asian Conference on Remote Sensing 2013, ACRS 2013
CountryIndonesia
CityBali
Period13/10/2013/10/24

Keywords

  • Backscattering coefficient
  • Disaster monitoring
  • Paddy field
  • Synthetic aperture radar

ASJC Scopus subject areas

  • Computer Networks and Communications

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  • Cite this

    Yonezawa, C., Watanabe, M., & Saito, G. (2013). Extraction of temporal change on tsunami damaged agricultural field by the 2011 tohoku earthquake using terrasar-x data. In 34th Asian Conference on Remote Sensing 2013, ACRS 2013 (pp. 3723-3729). (34th Asian Conference on Remote Sensing 2013, ACRS 2013; Vol. 4). Asian Association on Remote Sensing.