TY - JOUR 
A1 - Calatrava Leyva, Javier
AU - Sayadi, Samir
T1 - Economic valuation of water and «willingness to pay» analysis with repect to tropical fruit production in southeastern Spain
Y1 - 2005
SN - 1695-971-X
UR - http://hdl.handle.net/10317/1589
AB - [ENG] This paper reports a survey of how 64 tropical fruit growers from the Granada coast of Spain use and value their
water resources. This area produces crops of high added value. The agricultural demand for water is ever increasing
and is much greater than the actual supply. This problem is worsened by the infiltration of seawater into the aquifers
that provide most of the irrigation water for the area. Moreover, the population increases five-fold in the summer due
to tourism, further aggravating the problem of water scarcity. Technical innovations, especially the reuse of urban
wastewater, and economic solutions, namely increasing the price of water, have been proposed under the European
Union Water Framework Directive. The main questions in the survey are described and the responses analysed. The
productive, technological and resource management characteristics that determine the growers’ expressed willingness
to pay for the water they use, as well as their attitude towards the use of alternative sources (such as residual water)
are examined. Finally, the marginal product value of irrigation water in the area is calculated. [This paper reports a survey of how 64 tropical fruit growers from the Granada coast of Spain use and value their
water resources. This area produces crops of high added value. The agricultural demand for water is ever increasing
and is much greater than the actual supply. This problem is worsened by the infiltration of seawater into the aquifers
that provide most of the irrigation water for the area. Moreover, the population increases five-fold in the summer due
to tourism, further aggravating the problem of water scarcity. Technical innovations, especially the reuse of urban
wastewater, and economic solutions, namely increasing the price of water, have been proposed under the European
Union Water Framework Directive. The main questions in the survey are described and the responses analysed. The
productive, technological and resource management characteristics that determine the growers’ expressed willingness
to pay for the water they use, as well as their attitude towards the use of alternative sources (such as residual water)
are examined. Finally, the marginal product value of irrigation water in the area is calculated. [ESP] El presente artículo expone algunos resultados de una encuesta realizada a 64 explotaciones de fruticultura tropical
de la costa tropical de Granada sobre el uso y valoración de los recursos hídricos de que disponen. Se trata de una zona
de cultivos con un gran valor añadido, en la que la demanda agrícola de agua es creciente y muy superior a la oferta. Esta
situación se ve agravada por problemas de intrusión marina en el acuífero del que se surte principalmente la zona, con
la consiguiente degradación de la calidad en el agua de riego. Además, la población se quintuplica en verano por el turismo,
lo que agudiza el problema. Se han planteado tanto soluciones técnicas (especialmente el uso de aguas residuales
depuradas de origen urbano), como soluciones de naturaleza económica (básicamente incrementos del precio del
agua), de acuerdo con lo establecido en la Directiva Marco de la Unión Europea. En primer lugar se presenta un análisis
descriptivo de las respuestas más importantes de los agricultores a la encuesta. A continuación se estudia qué características
productivas, tecnológicas y de gestión de recursos en las explotaciones determinan una mayor disposición expresada
por los agricultores a pagar por el agua actualmente utilizada, así como su actitud ante el uso de fuentes alternativas
tales como las aguas residuales. Finalmente se calcula el valor del producto marginal del agua de riego.
KW - Economía, Sociología y Política Agraria
KW - Valor económico del agua
KW - Fruticultura tropical
KW - Disposición a pagar por agua
KW - Economic value of water
KW - Tropical fruit production
KW - Willingness to pay for water
LA - eng
PB - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)
ER -