use of swat for optimizing irrigation strategies for sugarcane production … · 2014. 8. 5. ·...
TRANSCRIPT
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Use of SWAT for optimizing irrigation
strategies for sugarcane production on
the Island of Maui, Hawaii.
Javier OsorioJaehak Jeong
Katrin Bieger
Norman Meki
Jeff Arnold2014 International SWAT ConferenceArmação Hotel, Porto De Galinhas, Br.
July 30 - August 1, 2014
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Maui / HC&S
Introduction
Hawaiian Commercial &
Sugar Company
• Sugarcane - 184.3 km2
• Average yield: 159.9 t ha-1
• Irrigation: 760,000 m3 d-1
(drip irrigation)
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Maui, HI
Introduction
• Climatic characteristics
• Water diversion & transport
• Water usage concerns
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Model setup
Methods
• SWAT model
• Landuse:
• 701 Sugarcane
• Soils data:
• SSURGO
• HC&S Climate data:
• 16 Weather stations
• 40 Rain gauges
• Simulation period 2003-2013
• 1 year spin up
• Crop parameters
• Irrigation DB
• Penman-Monteith method
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HC&S Climatic DB
Methods
• Climatic variables
• Precipitation (mm)
• Temperature ( C)
• Solar Radiation (MJm-2)
• Wind Velocity (m/s)
• Relative Humidity (%)
• Time period 1997-2013
• Data processing:
• Historical extreme events
• Missing data
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Water budget (mm)
Results
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Objective
Introduction
To perform a sensitivity assessment of sugarcane yields to various irrigation schemes.
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Experiment
Methods
• Treatments:
• Historical Irrigation dataset (100%)
• Treatments (+25, -25, -50, -75%)
• Automatic irrigation
• Response variables:
• Crop yield
• WUE
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Crop Yield
Results
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LAI (Obs : Sim)
Results
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Crop growth (Obs : Sim)
Results
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LAI (Obs : Sim)
Results
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Crop growth (Obs : Sim)
Results
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Crop Yield
Results
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Water Use Efficiency
Results
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Auto Irrigation
Results
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Auto Irrigation
Results
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Crop Yield
Results
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Water Use Efficiency
Results
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Lessons learned & Future work
Conclusions
• Lessons learned
• SWAT can adequately estimate sugarcane growth under
different water management
• Sugarcane yield and growth rate highly sensitive to water
reductions.
• Timing of irrigation is as important as volume applied
• Future work
• WUE analysis entire plantation
• Plant/Crop algorithm
• Alternative biofuel crops
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Javier M. Osorio Leyton, [email protected]
Blackland Research & Extension Center720 East Blackland Road | Temple, TX 76502-9622
http://www.blackland.tamu.edu
2014 International SWAT ConferenceArmação Hotel, Porto De Galinhas, Br.
July 30 - August 1, 2014