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

Quiroga Gomez, Sonia; Fernandez-Haddad, Z. y 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.

Descripción

Título: Crop yields response to water pressures in the Ebro basin in Spain: risk and water policy implications
Autor/es:
  • Quiroga Gomez, Sonia
  • Fernandez-Haddad, Z.
  • Iglesias Picazo, Ana
Tipo de Documento: Artículo
Título de Revista/Publicación: Hydrology and earth system sciences
Fecha: Febrero 2011
Volumen: 15
Materias:
Escuela: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Departamento: Economía y Ciencias Sociales Agrarias [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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.

Más información

ID de Registro: 7138
Identificador DC: http://oa.upm.es/7138/
Identificador OAI: oai:oa.upm.es:7138
Identificador DOI: 10.5194/hess-15-505-2011
URL Oficial: http://www.hydrol-earth-syst-sci.net/15/505/2011/hess-15-505-2011.html
Depositado por: Memoria Investigacion
Depositado el: 23 May 2011 09:34
Ultima Modificación: 20 Abr 2016 16:17
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