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Article

Rapid Assessment of Crop Status: An Application of MODIS and SAR Data to Rice Areas in Leyte, Philippines Affected by Typhoon Haiyan

1
Institute for Electromagnetic Sensing of the Environment, Italian National Research Council, Via Bassini 15, Milan 20133, Italy
2
International Rice Research Institute (IRRI), Los Baños, Laguna 4031, Philippines
3
Sarmap, Cascine di Barico 10, Purasca 6989, Switzerland
4
Philippine Rice Research Institute (PhilRice), Muñoz, Nueva Ecija 3119, Philippines
*
Authors to whom correspondence should be addressed.
Academic Editors: Tao Cheng, Clement Atzberger and Prasad S. Thenkabail
Remote Sens. 2015, 7(6), 6535-6557; https://doi.org/10.3390/rs70606535
Received: 17 March 2015 / Revised: 12 May 2015 / Accepted: 13 May 2015 / Published: 26 May 2015
(This article belongs to the Special Issue Recent Advances in Remote Sensing for Crop Growth Monitoring)
Asian countries strongly depend on rice production for food security. The major rice-growing season (June to October) is highly exposed to the risk of tropical storm related damage. Unbiased and transparent approaches to assess the risk of rice crop damage are essential to support mitigation and disaster response strategies in the region. This study describes and demonstrates a method for rapid, pre-event crop status assessment. The ex-post test case is Typhoon Haiyan and its impact on the rice crop in Leyte Province in the Philippines. A synthetic aperture radar (SAR) derived rice area map was used to delineate the area at risk while crop status at the moment of typhoon landfall was estimated from specific time series analysis of Moderate Resolution Imaging Spectroradiometer (MODIS) data. A spatially explicit indicator of risk of standing crop loss was calculated as the time between estimated heading date and typhoon occurrence. Results of the analysis of pre- and post-event SAR images showed that 6500 ha were flooded in northeastern Leyte. This area was also the region most at risk to storm related crop damage due to late establishment of rice. Estimates highlight that about 700 ha of rice (71% of which was in northeastern Leyte) had not reached maturity at the time of the typhoon event and a further 8400 ha (84% of which was in northeastern Leyte) were likely to be not yet harvested. We demonstrated that the proposed approach can provide pre-event, in-season information on the status of rice and other field crops and the risk of damage posed by tropical storms. View Full-Text
Keywords: phenology; typhoon; rice; Philippines; rapid damage assessments phenology; typhoon; rice; Philippines; rapid damage assessments
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MDPI and ACS Style

Boschetti, M.; Nelson, A.; Nutini, F.; Manfron, G.; Busetto, L.; Barbieri, M.; Laborte, A.; Raviz, J.; Holecz, F.; Mabalay, M.R.O.; Bacong, A.P.; Quilang, E.J.P. Rapid Assessment of Crop Status: An Application of MODIS and SAR Data to Rice Areas in Leyte, Philippines Affected by Typhoon Haiyan. Remote Sens. 2015, 7, 6535-6557. https://doi.org/10.3390/rs70606535

AMA Style

Boschetti M, Nelson A, Nutini F, Manfron G, Busetto L, Barbieri M, Laborte A, Raviz J, Holecz F, Mabalay MRO, Bacong AP, Quilang EJP. Rapid Assessment of Crop Status: An Application of MODIS and SAR Data to Rice Areas in Leyte, Philippines Affected by Typhoon Haiyan. Remote Sensing. 2015; 7(6):6535-6557. https://doi.org/10.3390/rs70606535

Chicago/Turabian Style

Boschetti, Mirco, Andrew Nelson, Francesco Nutini, Giacinto Manfron, Lorenzo Busetto, Massimo Barbieri, Alice Laborte, Jeny Raviz, Francesco Holecz, Mary R.O. Mabalay, Alfie P. Bacong, and Eduardo J.P. Quilang 2015. "Rapid Assessment of Crop Status: An Application of MODIS and SAR Data to Rice Areas in Leyte, Philippines Affected by Typhoon Haiyan" Remote Sensing 7, no. 6: 6535-6557. https://doi.org/10.3390/rs70606535

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