Figure 12: Sugarbeet actual evapotranspiration (ETc) during the crop irrigation period at current and 2025 climate conditions. Vertical bars indicate ETc variability.

The sugarbeet actual evapotranspirations in 2025 are higher, or at least similar, than the corresponding evapotranspiration in the current climate conditions, as expected. Furthermore, the variability of actual evapotranspiration is also very high in 2025. It means that the considered water management might be not enough to satisfy the sugarbeet water requirements in several years around 2025. The success probability of the considered water management is much higher under current conditions. Weather variability has been internationally estimated as the most important climate-change risk in agriculture (Katz and Brown, 1992; Mearns et al., 1996; Riha et al., 1996; Rosenzweig et al., 2002). The European approach and the Spanish assessments agree also with these estimates (Minguez et al., 2005; EC, 2007). Our results indicated also that the enhancement of weather variability around 2025, associated to Climate Change, could significantly affect the reliability of the currently considered sugarbeet irrigation-management.

Furthermore, Figure 13 shows the simulated water flux (positive downwards) under the whole irrigation campaign.

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