4.7 Article

Potential changes in irrigation requirements and phenology of maize, apple trees and alfalfa under global change conditions in Fluvia watershed during XXIst century: Results from a modeling approximation to watershed-level water balance

期刊

AGRICULTURAL WATER MANAGEMENT
卷 114, 期 -, 页码 78-87

出版社

ELSEVIER
DOI: 10.1016/j.agwat.2012.07.006

关键词

Climate change; Maize; Apple trees; Alfalfa; Ecohydrology; Irrigation needs

资金

  1. Fundacio Catalunya Caixa
  2. Spanish Ministry of Science and Innovation [CSD2008-00040, AGL2008-04525-C02-02, AGL2010-21012]

向作者/读者索取更多资源

To evaluate the vulnerability of agriculture under Mediterranean conditions, the real water needs of agriculture in the Fluvia watershed (Catalonia, NE Spain) were estimated for the XXIst century using a combination of downscaled climate projections (ECHAMS plus MMS) in two IPCC scenarios (B1 and A2), watershed hydrological model (SWAT) and FAO procedure to calculate crop potential evapotranspiration. In comparison with baseline conditions (1984-2008), climate projections predicted a 12% (B1) to 28% (A2) reduction in precipitation, and a 2.2 degrees C (B1) to 3.6 degrees C (A2) increment of mean annual temperature at the end of the XXI Century (2076-2100). The changes of the environmental conditions would affect the real water availability in different crops: water required for irrigation would increase significantly along the century, ranging from 40 to 250% depending on the crop, because of a direct decrease in the amount of water available along the growing season and because of the effects of the projected climatic conditions on potential evapotranspiration (ET0) and on the phenology of these crops. Results are showing the high sensitivity of agriculture, despite its expanding technology, to changes in climate, and even more to site, plot, orchard or terroir conditions. (C) 2012 Elsevier B.V. All rights reserved.

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