Crop yields response to water pressures in the Ebro basin in Spain: risk and water policy implications

Quiroga Gomez, Sonia and Fernandez-Haddad, Z. and Iglesias Picazo, Ana (2011). Crop yields response to water pressures in the Ebro basin in Spain: risk and water policy implications. "Hydrology and earth system sciences", v. 15 (n. 2); pp. 505-518. ISSN 1027-5606. https://doi.org/10.5194/hess-15-505-2011.

Description

Title: Crop yields response to water pressures in the Ebro basin in Spain: risk and water policy implications
Author/s:
  • Quiroga Gomez, Sonia
  • Fernandez-Haddad, Z.
  • Iglesias Picazo, Ana
Item Type: Article
Título de Revista/Publicación: Hydrology and earth system sciences
Date: February 2011
ISSN: 1027-5606
Volume: 15
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Economía y Ciencias Sociales Agrarias [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

he increasing pressure on water systems in the Mediterranean enhances existing water conflicts and threatens water supply for agriculture. In this context, one of the main priorities for agricultural research and public policy is the adaptation of crop yields to water pressures. This paper focuses on the evaluation of hydrological risk and water policy implications for food production. Our methodological approach includes four steps. For the first step, we estimate the impacts of rainfall and irrigation water on crop yields. However, this study is not limited to general crop production functions since it also considers the linkages between those economic and biophysical aspects which may have an important effect on crop productivity. We use statistical models of yield response to address how hydrological variables affect the yield of the main Mediterranean crops in the Ebro river basin. In the second step, this study takes into consideration the effects of those interactions and analyzes gross value added sensitivity to crop production changes. We then use Montecarlo simulations to characterize crop yield risk to water variability. Finally we evaluate some policy scenarios with irrigated area adjustments that could cope in a context of increased water scarcity. A substantial decrease in irrigated land, of up to 30% of total, results in only moderate losses of crop productivity. The response is crop and region specific and may serve to prioritise adaptation strategies.

More information

Item ID: 7138
DC Identifier: http://oa.upm.es/7138/
OAI Identifier: oai:oa.upm.es:7138
DOI: 10.5194/hess-15-505-2011
Official URL: http://www.hydrol-earth-syst-sci.net/15/505/2011/hess-15-505-2011.html
Deposited by: Memoria Investigacion
Deposited on: 23 May 2011 09:34
Last Modified: 20 Apr 2016 16:17
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