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Quantitative informationon agriculture and water use
Maurits VoogtChief Competence Center
Content
• Introduction• Technology• Regional scale information• Field scale data• Applications
INTRODUCTION
Introduction
eLEAF•Since 2000•Wageningen based•Global experience•Agricultural water management•Crop monitoring•PiMapping®
Experience on all continents
What is PiMapping® ?
Pixel Intelligence Mapping
PiMapping® technology is a toolbox of algorithms:•Based on satellite imagery and meteo data•Resulting in quantative data in mm, kg, °C, etc•Information on Water, Vegetation & Climate
Detailed quantitative
data
such asBiomass Production
[kg/ha]
eLEAF’s data components
Data Components WATER Actual Evapotranspiration (E, T, interception),
precipitation, top soil moisture, water stress, storage change reservoirs, storage change aquifers, water productivity, water accounting, irrigation performance
VEGETATION Actual biomass production, Land cover, Fractional vegetation cover, Leaf Area Index LAI, fPAR, crop coefficient, crop yield, CO2 flux, sowing date, harvest date, physical land degradation, anthropogenic land degradation
CLIMATE Surface temperature, air temperature, air humidity, wind speed, cloud cover, solar radiation, sensible heat flux (H), latent heat flux (LE)
TECHNOLOGYHOW DOES IT WORK?
Energy balance
• SEBAL: Surface Energy Balance Algorithm for Land• Successor: ETLook
SEBAL
a
s
a
aspn
r
r
r
eecGR
ET241
d tttA P A RB io
albedo, temperature, cloud cover
Actual water useBiomass production and yield
Weather station dataVegetation index
REGIONAL INFORMATION
GSCP Yemen
• Groundwater and Soil Conservation Project• Objective: quantify ground water abstraction
Actual water use
How much water is used in 2006?
Actual water use
Overconsumption Yemen
• Average: 139 mm/year• Locally up to 1000 mm/year
FIELD SCALE DATA
FieldLook.com
FieldLook.com
Weekly updates:•Growth•Moisture•Minerals•Returns
Available in:•Spain, Canada, Russia, Ukraine, South Africa, Netherlands, Belgium
In field variability
25 March 25 May 7 July
23 July 12 Aug 4 Sept 8 Sept
Just NDVI...?• Smooth NDVI curve
• Biomass production varies from week to week [kg/ha/wk]
• Actual transpiration [mm/wk]
• Transpiration deficit [mm/wk]
Satellite imagery
eLEAF requires satellite imagery on:•High resolution•Large areas•Daily updates
APPLICATIONS
Applications
eLEAF’s data components can be used:•For monitoring•To advice•In automated applications
Monitor: water productivity2004-5
2005-6
2004-5
0.000
0.005
0.010
0.015
0 150 300 450 600 750liters water needed to produce 1 liter of wine
freq
uen
cy
Spatial distribution of good and bad practices.
Learn from each other and improve to the same level.
Advice: haulm killing
Van Es Rosetta: •Haulm killing is planned on September 5•Heterogeneous crops on September 4•Dosing of chemicals should vary as well
Applications: Irrigation planner
• PiMapping® technology measures and forecasts soil moisture
• Irrigation planner indicates when irrigation is required
Value Adding Partners
eLEAF is building a global networkof Value Adding Partners
•What can you do with quantative data?
