Agricultural Irrigation Water Use in a Closed Basin and the Impacts on Water Productivity: The Case of the Guadalquivir River Basin (Southern Spain)
Autor
Expósito, Alfonso
Berbel, Julio
Editor
MDPIFecha
2017Materia
Irrigation water productivityAgricultural water use
Basin closure
Water policy
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This paper analyses the agricultural irrigation water use in a closed basin and the impacts
on water productivity, and examines how they have affected the ‘closure’ process of the
Guadalquivir river basin observed in recent decades. Following a period of expansion in irrigation,
an administrative moratorium was declared on new irrigated areas in 2005. Since then, the main
policy measure has been aimed at the modernisation of irrigated agriculture and the
implementation of water conservation technologies. The analysis carried out in this paper shows a
significant increase in mean irrigation water productivity in the pre‐moratorium period (1989–2005),
driven by the creation of new irrigated areas devoted to high value crops and with a dominant use
of deficit irrigation strategies, while a second phase (2005–2012) is characterised by slower growth
in terms of the mean productivity of irrigation water, primarily as a result of a significant reduction
in water use per area. Findings show that productivity gains seem to have reached a ceiling in this
river basin, since technological innovations (such as new crops, deficit irrigation, and water‐saving
and conservation technologies) have reached the limits of their capacity to create new value
Fuente
Water 9(2), 136 (2017)Versión del Editor
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