Rice yield estimation using synthetic aperture radar (SAR) and the ORYZA crop growth model: development and application of the system in South and South-east Asian countries

Rice yield estimation using synthetic aperture radar (SAR) and the ORYZA crop growth model: development and application of the system in South and South-east Asian countries

A rice yield estimation system was developed based on the crop growth model ORYZA and SAR-derived key information such as start of season (SOS) and leaf area growth rate. Results from study sites in South and South-east Asian countries suggest that incorporating remote sensing data, specifically Syn...

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Bibliographic Details
Published in:International journal of remote sensing Vol. 40; no. 21; pp. 8093 - 8124
Main Authors: Setiyono, T. D., Quicho, E. D., Holecz, F. H., Khan, N. I., Romuga, G., Maunahan, A., Garcia, C., Rala, A., Raviz, J., Collivignarelli, F., Gatti, L., Barbieri, M., Phuong, D. M., Minh, V. Q., Vo, Q. T., Intrman, A., Rakwatin, P., Sothy, M., Veasna, T., Pazhanivelan, S., Mabalay, M. R. O.
Format: Journal Article
Language:English
Published: London Taylor & Francis 02-11-2019
Taylor & Francis Ltd
Subjects:
Agricultural production
Cereal crops
Climate
Computer simulation
Crop growth
Crop yield
Crops
Data assimilation
Data collection
Disaster management
Emergency preparedness
Environmental conditions
Environmental policy
Food security
Growth models
Growth rate
Mathematical models
National planning
Natural disasters
Oryza
Radar
Radar data
Remote sensing
Rice
Rice yield
SAR (radar)
Simulation
Spatial distribution
Statistical methods
Synthetic aperture radar
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Summary:A rice yield estimation system was developed based on the crop growth model ORYZA and SAR-derived key information such as start of season (SOS) and leaf area growth rate. Results from study sites in South and South-east Asian countries suggest that incorporating remote sensing data, specifically Synthetic aperture radar (SAR), into a process-based crop model improves the spatial distribution of yield estimates. This article highlights the detailed methodology of SAR data incorporation into crop yield simulation and comprehensive validation of yield forecast and estimates in the Philippines, Vietnam, Cambodia, Thailand, and Tamil Nadu, India. Remote sensing data assimilation into a crop model effectively captures the responses of rice crops to environmental conditions over large spatial coverage, which otherwise is practically impossible to achieve. A process-based crop simulation model is used in the system to ensure that climate information is captured, and this provides the capacity to deliver a mid-season yield forecast for national planning and policy for rice. Good agreement between SAR-based yield and crop-cut-based yield and official yield statistics and ensuring efficiency of the processing suggest that the system is a promising solution for the needed timely information on rice yield for application in food security and policies, climate disaster management, and crop insurance programs.
ISSN:0143-1161
1366-5901
DOI:10.1080/01431161.2018.1547457