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Remote sensing based yield
model and application to major
exporting countries
B. Franch1,2, E. Vermote3, Sergii Skakun2,3, Jean-Claude Roger2,3,
I. Becker-Reshef2, C. Justice2,3
1 Global Change Unit, Image Processing Laboratory, Universitat de Valencia,
Paterna, 46980 Valencia, Spain
2 Department of Geographical Sciences, University of Maryland,
College Park MD 20742, United States
3 NASA Goddard Space Flight Center, 8800 Greenbelt Road,
Greenbelt, MD 20771, United States
befranch@umd.edu
Land Climate Data Record
Multi instrument/Multi sensor Science Quality Data Records used to
quantify trends and changes
Why do we use coarse resolution?
Emphasis on data consistency
Coarse (250m) Moderate (30m) Fine (5m)
Problems when working with coarse spatial
resolution data
Basis: Strong correlation between NDVI Peak and yield
Tucker 1980, Hatfield 1983, Benedetti 1993, Doraiswamy 1995, Rasmussen 1997, Mika 2002
Becker-Reshef I, Vermote E, Lindeman M, Justice C. 2010. In Remote Sensing of Environment, 114, 1312–1323.
Previous remote sensing methods
(Becker-Reshef et al., 2010)
USA (MODIS) USA (AVHRR)
Franch, B., Vermote, E., Roger, J.C., Murphy, E., Becker-Reshef, I., Justice, C., Claverie, M., Nagol, J., Csiszar, I., Meyer, D., Baret, F.,
Masuoka, E., Wolfe, R. and Devadiga, S., (2017) A 30+ year AVHRR Land Surface Reflectance Climate Data Record and its application to
wheat yield monitoring, Remote Sensing, 9, 296
Improvement of the method
The NDVI peak occurs around
1 month prior to the harvest
(earliest forecast using this
method)
Inclusion of an additional
parameter (the Growing Degree
Days, GDD) to improve the
timeliness of the prediction
YIELD MONITORING
Franch, B., E. F. Vermote, I. Becker-Reshef, M. Claverie, J. Huang, J. Zhang, C. Justice and J. A. Sobrino, 2015. Remote Sensing of Environment
Tbase = 0 °C
Improvement of the method
The NDVI peak occurs around
1 month prior to the harvest
(earliest forecast using this
method)
Inclusion of an additional
parameter (the Growing Degree
Days, GDD) to improve the
timeliness of the prediction
YIELD MONITORING
Franch, B., E. F. Vermote, I. Becker-Reshef, M. Claverie, J. Huang, J. Zhang, C. Justice and J. A. Sobrino, 2015. Remote Sensing of Environment
Tbase = 0 °CReliable estimation (10% error) between 1-
1.5 month prior to the peak NDVI (meaning
2-2.5 months prior to harvest)
USA
For each AU and a given date, the total DVI signal from each
pixel can be written as:
𝐷𝐷𝐷𝐷𝐷𝐷𝑖𝑖 = 𝐷𝐷𝐷𝐷𝐷𝐷𝑤𝑤𝑤𝑤𝑤𝑤𝑤𝑤𝑤 − 𝐷𝐷𝐷𝐷𝐷𝐷𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜 � 𝑊𝑊𝑊𝑊𝑊𝑊𝑊𝑊𝑖𝑖 + 𝐷𝐷𝐷𝐷𝐷𝐷𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜
DVIwheat : DVI signal from the wheat
DVIothers: DVI from other surfaces within the pixel
Wpct: percentage of wheat within the pixel or wheat purity
MODIS 1km RGB (2/21/2017)
Harper county (Kansas)
2017 wheat mask (from CDL)
Harper county (Kansas)
Franch, B., Vermote, E. F., Skakun, S., Roger, J. C., Becker-Reshef, I., Murphy, E., & Justice, C. (2019). Remote sensing based yield monitoring:
Application to winter wheat in United States and Ukraine. International Journal of Applied Earth Observation and Geoinformation, 76, 112-127.
100%
0%
New method
Calibration equations
For each AU, a separate linear regression was built with different combinations
of regressors
Seasonal Peak Peak length
Input parameters
Evaporative Fraction
(after the peak)
New method
US winter wheat validation
County level validation National level validation
Black dots: each
county and year
from 2001-2016
Red dots: each
county in 2017
Application to other countries
60% of the global
wheat exports in 2018
Yield forecasting
Working on adapting Franch et al. (2015) to the new method
County level validation National level validation
US corn validation
County level validation National level validation
US soybean validation
Conclusions
• A generic crop yield simple regression model has been developed
based on a the “wheat” DVI at the peak of the growing process, the
length of the peak and EF information.
• Can estimate yield for the main wheat exporting countries with an
accuracy
– 7% at national level
– 15% at sub-national level
• The new method shows high correlation with official statistics and
captures well extreme yield conditions (maximum and minimum).
Freezing and flooding is still a problem
• First results on yield forecasting show promising results
• The model is also applicable to other cereals (corn and soybean)

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Remote Sensing Based Yield Model and Application to Major Exporting Countries

  • 1. Remote sensing based yield model and application to major exporting countries B. Franch1,2, E. Vermote3, Sergii Skakun2,3, Jean-Claude Roger2,3, I. Becker-Reshef2, C. Justice2,3 1 Global Change Unit, Image Processing Laboratory, Universitat de Valencia, Paterna, 46980 Valencia, Spain 2 Department of Geographical Sciences, University of Maryland, College Park MD 20742, United States 3 NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, MD 20771, United States befranch@umd.edu
  • 2. Land Climate Data Record Multi instrument/Multi sensor Science Quality Data Records used to quantify trends and changes Why do we use coarse resolution? Emphasis on data consistency
  • 3. Coarse (250m) Moderate (30m) Fine (5m) Problems when working with coarse spatial resolution data
  • 4. Basis: Strong correlation between NDVI Peak and yield Tucker 1980, Hatfield 1983, Benedetti 1993, Doraiswamy 1995, Rasmussen 1997, Mika 2002 Becker-Reshef I, Vermote E, Lindeman M, Justice C. 2010. In Remote Sensing of Environment, 114, 1312–1323. Previous remote sensing methods (Becker-Reshef et al., 2010) USA (MODIS) USA (AVHRR) Franch, B., Vermote, E., Roger, J.C., Murphy, E., Becker-Reshef, I., Justice, C., Claverie, M., Nagol, J., Csiszar, I., Meyer, D., Baret, F., Masuoka, E., Wolfe, R. and Devadiga, S., (2017) A 30+ year AVHRR Land Surface Reflectance Climate Data Record and its application to wheat yield monitoring, Remote Sensing, 9, 296
  • 5. Improvement of the method The NDVI peak occurs around 1 month prior to the harvest (earliest forecast using this method) Inclusion of an additional parameter (the Growing Degree Days, GDD) to improve the timeliness of the prediction YIELD MONITORING Franch, B., E. F. Vermote, I. Becker-Reshef, M. Claverie, J. Huang, J. Zhang, C. Justice and J. A. Sobrino, 2015. Remote Sensing of Environment Tbase = 0 °C
  • 6. Improvement of the method The NDVI peak occurs around 1 month prior to the harvest (earliest forecast using this method) Inclusion of an additional parameter (the Growing Degree Days, GDD) to improve the timeliness of the prediction YIELD MONITORING Franch, B., E. F. Vermote, I. Becker-Reshef, M. Claverie, J. Huang, J. Zhang, C. Justice and J. A. Sobrino, 2015. Remote Sensing of Environment Tbase = 0 °CReliable estimation (10% error) between 1- 1.5 month prior to the peak NDVI (meaning 2-2.5 months prior to harvest) USA
  • 7. For each AU and a given date, the total DVI signal from each pixel can be written as: 𝐷𝐷𝐷𝐷𝐷𝐷𝑖𝑖 = 𝐷𝐷𝐷𝐷𝐷𝐷𝑤𝑤𝑤𝑤𝑤𝑤𝑤𝑤𝑤 − 𝐷𝐷𝐷𝐷𝐷𝐷𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜 � 𝑊𝑊𝑊𝑊𝑊𝑊𝑊𝑊𝑖𝑖 + 𝐷𝐷𝐷𝐷𝐷𝐷𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜 DVIwheat : DVI signal from the wheat DVIothers: DVI from other surfaces within the pixel Wpct: percentage of wheat within the pixel or wheat purity MODIS 1km RGB (2/21/2017) Harper county (Kansas) 2017 wheat mask (from CDL) Harper county (Kansas) Franch, B., Vermote, E. F., Skakun, S., Roger, J. C., Becker-Reshef, I., Murphy, E., & Justice, C. (2019). Remote sensing based yield monitoring: Application to winter wheat in United States and Ukraine. International Journal of Applied Earth Observation and Geoinformation, 76, 112-127. 100% 0% New method
  • 8. Calibration equations For each AU, a separate linear regression was built with different combinations of regressors Seasonal Peak Peak length Input parameters Evaporative Fraction (after the peak)
  • 10. US winter wheat validation County level validation National level validation Black dots: each county and year from 2001-2016 Red dots: each county in 2017
  • 11. Application to other countries 60% of the global wheat exports in 2018
  • 12. Yield forecasting Working on adapting Franch et al. (2015) to the new method
  • 13. County level validation National level validation US corn validation
  • 14. County level validation National level validation US soybean validation
  • 15. Conclusions • A generic crop yield simple regression model has been developed based on a the “wheat” DVI at the peak of the growing process, the length of the peak and EF information. • Can estimate yield for the main wheat exporting countries with an accuracy – 7% at national level – 15% at sub-national level • The new method shows high correlation with official statistics and captures well extreme yield conditions (maximum and minimum). Freezing and flooding is still a problem • First results on yield forecasting show promising results • The model is also applicable to other cereals (corn and soybean)