Remote Sensing Applications and Decision Support

Assessing rice crop damage and restoration using remote sensing in tsunami-affected areas, Japan

[+] Author Affiliations
Chi-Farn Chen, Nguyen-Thanh Son, Cheng-Ru Chen, Shou-Hao Chiang, Ly-Yu Chang

National Central University, Center for Space and Remote Sensing Research, 300, Jhongda Road, Jhongli District, Taoyuan City 32001, Taiwan

Kohei Cho

Tokai University, Research & Information Center, 2-28-4, Tomigaya, Shibuya-ku, Tokyo 151-0063, Japan

Ya-Yun Hsiao

National Central University, Department of Civil Engineering, 300, Jhongda Road, Jhongli District, Taoyuan City 32001, Taiwan

J. Appl. Remote Sens. 9(1), 096002 (Oct 08, 2015). doi:10.1117/1.JRS.9.096002
History: Received March 16, 2015; Accepted September 9, 2015
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Abstract.  The tsunami that occurred on March 11, 2011, in Japan caused widespread devastation of infrastructure and rice cultivation areas. This study assessed the rice growing areas damaged due to this event and the restoration progress using moderate resolution imaging spectroradiometer data. The data were processed for 2010 to 2013, comprising four main steps: (1) data preprocessing to construct the smooth time-series enhanced vegetation index 2 data, (2) rice crop mapping using the dynamic time warping algorithm, (3) accuracy assessment, and (4) change analysis of rice cultivation areas. The mapping results validated using the ground reference data indicated overall accuracies and kappa coefficients generally >84.3% and 0.69, respectively. The results, also verified with the government’s rice area statistics, reaffirmed a close correlation between these two datasets (R2>0.77). When examining changes of rice cultivation between 2010 and 2013, the rice area damaged by the tsunami during 2010 to 2011 was 17,550ha. The rice area restored after one year (2012) was 6663ha, but this regressed slightly in 2013 (5656 ha). Such information could be used by officials to better understand the tsunami-damaged rice area and the restoration progress for crop management in the study region.

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Citation

Chi-Farn Chen ; Nguyen-Thanh Son ; Cheng-Ru Chen ; Kohei Cho ; Ya-Yun Hsiao, et al.
"Assessing rice crop damage and restoration using remote sensing in tsunami-affected areas, Japan", J. Appl. Remote Sens. 9(1), 096002 (Oct 08, 2015). ; http://dx.doi.org/10.1117/1.JRS.9.096002


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