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Establecimiento de un precio optimo ambiental y social para el agua de riego mediante la internalizacion de los costes ambientales y el uso de matrices de contabilidad social..

Author

Listed:
  • Elorrieta, Jose Ignacio
  • Castellano, E.
  • de Anguita, P. Martinez
  • Pellitero, M.
  • Rey, Concepcion

Abstract

RESUMEN - Se propone una metodología para obtener un "precio social y ambiental óptimo" que pueda aplicarse al agua de riego en la Comunidad Foral de Navarra (CFN) de modo que maximice la internalización de los costes ambientales asociados al consumo no contemplados en el actual precio sin que el nivel general de la economía regional se resienta. Para ello se elabora un modelo económico sobre un Sistema de Información Geográfica (SIG) que permite cuantificar y valorar los costes ambientales en cada una de las subcuencas de la Comunidad. Para valorar íntegramente el agua, los elementos que se tienen en cuenta son: volumen, calidad y riesgo de afectar a los ecosistemas acuáticos y de ribera. Estos valores son estimados mediante métodos de valoración económico ambiental. Se construye una curva de demanda para los regantes y un modelo de matrices de cuentas sociales (MCS). A partir de estos elementos se estudia el impacto que sobre la economía de la región tendría un incremento en el precio del agua. Se establece un rango potencial de precios del agua de riego desde el que minimiza los impactos económicos negativos -precio social óptimo- hasta el que internaliza totalmente los costes ambientales del agua- precio ambiental óptimo-. PALABRAS CLAVE: agua, precio óptimo social del agua, SIG, Matriz de Contabilidad Social (MCS), externalidades. SUMMARY - This work develops a methodology to obtain a "social ad environmental optimal price" for water in the Comunidad Foral de Navarra (CFN) in order to maximize the internalization of the water environmental cost generated by agricultural consumption without affecting the general level of the regional economy. The economical model is built over a Geographical Information System (GIS) that allows quantifying and valuing in economical terms environmental water costs in different basins. Elements that have been considered to describe the water resource value are volume, quality and hazard to affect aquatic and bank ecosystems. Values have been estimated with Environmental Economy methods. A demand curve for water is also built and a Social Accounting Matrix (SAM) is used to watch if regional economy supports a price that internalizes total water value. Potential water prices are established ranging from prices that minimize negative economic regional impacts -social optimal price- to those that internalize totally the environmental costs of water- environmental optimal price.

Suggested Citation

  • Elorrieta, Jose Ignacio & Castellano, E. & de Anguita, P. Martinez & Pellitero, M. & Rey, Concepcion, 2003. "Establecimiento de un precio optimo ambiental y social para el agua de riego mediante la internalizacion de los costes ambientales y el uso de matrices de contabilidad social..," Economia Agraria y Recursos Naturales, Spanish Association of Agricultural Economists, vol. 3(01), pages 1-28.
    • Handle: RePEc:ags:earnsa:28745
    DOI: 10.22004/ag.econ.28745
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    Cited by:

    1. Dolores Rey & Alberto Garrido & Javier Calatrava, 2016. "An Innovative Option Contract for Allocating Water in Inter-Basin Transfers: the Case of the Tagus-Segura Transfer in Spain," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 30(3), pages 1165-1182, February.

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