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CROPWAT is a decision support system

CROPWAT is a decision support system. To calculate: Reference evapotranspiration Crop irrigation requirements To develop: Irrigation schedules under various management conditions To evaluate: Rainfed production and drought effects Efficiency of irrigation practices

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CROPWAT is a decision support system

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  1. CROPWAT is a decision support system To calculate: • Reference evapotranspiration • Crop irrigation requirements To develop: • Irrigation schedules under various management conditions To evaluate: • Rainfed production and drought effects • Efficiency of irrigation practices There are new challenges now...

  2. Crop water use and sowing density (pearl millet, Senegal) …

  3. Using crop residues for …. Food for the livestock ? Mulch for soil protection ?

  4. Climate Plant growing Water fluxes OM Transformation Heat fluxes Solute transport PASTIS Model R, ETP Rg, Ta LAI, H20uptake  Nuptake , q , q Tsurf y Navailable T Nmineral (*) Predicting Agronomical Solute Transfer in Soils

  5. Climate Plant growing Water fluxes OM Transformation Heat fluxes Mulch effects Solute transport PASTIS model with mulch R, ETP Rg, Ta LAI, H20uptake  I, Ev Nuptake , q , q Tsurf Tsurf Corganic, Norganic y Navailable T Nmineral

  6. Measured and Simulated components of water balance as modified by soil and residue management (case study, Mexico)

  7. Low input cropping systems for Ethanol Wheat production, (as alternative to subsidized fallows in Europe) • Satisfying farmers • Farmers income • Farmers working time • Satisfying industrials • Low protein content (N) in wheat grains • Low wheat price paid to farmers • Satisfying the public authorities • energy production (substitute to petrol) • Less nitrates in groundwater

  8. BETHA model, (Loyce 1998) Expertise Science Defining modules Defining functions Defining parameters Negociation process option 1 Coupled multicriteria analysis model Agro – environmental model option 2 option 3 Simulations

  9. Weighting criteria Decisions on selected cropping systems, and subsidizing system Negotiations

  10. Perspectives • Biophysical models for exploring scenarios, estimating long term effects, quantifying thresholds • Coupled with socio economical models for sharing a representation between different actors • Role of FAO in building models • Role of FAO in building negotiation frameworks

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