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La gestion de las aguas subterraneas en el acuifero Mancha Occidental

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  • Iglesias, Eva

Abstract

RESUMEN - En este artículo se aborda la problemática que plantea la recuperación del acuífero Mancha Occidental en el que existe una importante externalidad ambiental que se deriva de la relación entre las reservas de agua existentes en el acuífero y los humedales Tablas de Daimiel. Para ello, se desarrollan varios modelos de programación matemática que permiten evaluar distintos instrumentos de gestión para guiar la recuperación del acuífero a un estado sostenible. Los resultados obtenidos permiten al menos cuestionar la extendida regla de Gisser-Sánchez y revelan que las ganancias derivadas de la gestión óptima pueden ser significativas. En segundo lugar, las cuotas constantes por explotación se revelan como el instrumento menos eficiente tanto desde la perspectiva económica como ambiental. Además, se demuestra que un sistema de pagos aplicado como un instrumento compensador de un sistema de cuotas puede plantear conflictos con el paso del tiempo, ya que los pagos van a suponer una compensación cada vez menor de las pérdidas impuestas por las cuotas, a medida que el nivel freático se recupere. Por último, se demuestra que la gestión a través de un banco de aguas contribuiría a reconciliar los intereses de los agricultores con la conservación de los humedales. SUMMARY - This research focuses on the particular problem that emerges in overexploited aquifers when environmental externalities are present. This is the case of Mancha Occidental where environmental externalities derive from the interrelation of groundwater reserves and the preservation of Tablas de Daimiel wetlands. Several mathematical programming models are developed to evaluate alternative groundwater management policies aimed to assure the preservation of the wetlands. The results permit to argue that the Gisser-Sánchez rule, which states that gains derived from optimal management in groundwater are not significant, may be questionable. Moreover, the results show that differences in groundwater management policies are strongly determinant. In the first place, it has to be emphasized that a fix quota system could result in significant inefficiencies, both from the agricultural sector perspective and from the environmental perspective. Secondly, a payment system implemented to compensate the application of water quotas might cause undesired long term effects, as its relative compensation value will diminish as the aquifer's recovery level increases. Finally, the results show that a water banking system may contribute to reconcile farmers´ interest and the preservation of the wetlands.

Suggested Citation

  • Iglesias, Eva, 2002. "La gestion de las aguas subterraneas en el acuifero Mancha Occidental," Economia Agraria y Recursos Naturales, Spanish Association of Agricultural Economists, vol. 2(01), pages 1-20.
    • Handle: RePEc:ags:earnsa:28755
    DOI: 10.22004/ag.econ.28755
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    References listed on IDEAS

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    1. Burt, O.R. & Cummings, R.G. & McFarland, J.W., 1977. "Defining Upper Limits to Groundwater Development in the Arid West," 1977 AAEA-WAEA Joint Meeting, July 31-August 3, San Diego, California 283690, American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association).
    2. H. Scott Gordon, 1954. "The Economic Theory of a Common-Property Resource: The Fishery," Palgrave Macmillan Books, in: Chennat Gopalakrishnan (ed.), Classic Papers in Natural Resource Economics, chapter 9, pages 178-203, Palgrave Macmillan.
    3. Bill Provencher, 1993. "A Private Property Rights Regime to Replenish a Groundwater Aquifer," Land Economics, University of Wisconsin Press, vol. 69(4), pages 325-340.
    4. Carlson, Gerald A. & Zilberman, David & Miranowski, John, 1993. "Agricultural and Resource Economics," Staff General Research Papers Archive 11104, Iowa State University, Department of Economics.
    5. H. Scott Gordon, 1954. "The Economic Theory of a Common-Property Resource: The Fishery," Journal of Political Economy, University of Chicago Press, vol. 62(2), pages 124-124.
    6. O. R. Burt & R. G. Cummings & J. W. McFarland, 1977. "Defining Upper Limits to Groundwater Development in the Arid West," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 59(5), pages 943-947.
    7. Talbot Page, 1997. "On the Problem of Achieving Efficiency and Equity, Intergenerationally," Land Economics, University of Wisconsin Press, vol. 73(4), pages 580-596.
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    Cited by:

    1. Koppl-Turynaz, Monika, 2015. "Illegal Groundwater Pumping," 2015 Conference (59th), February 10-13, 2015, Rotorua, New Zealand 202577, Australian Agricultural and Resource Economics Society.
    2. Blanco-Gutiérrez, Irene & Varela-Ortega, Consuelo & Flichman, Guillermo, 2011. "Cost-effectiveness of groundwater conservation measures: A multi-level analysis with policy implications," Agricultural Water Management, Elsevier, vol. 98(4), pages 639-652, February.

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