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Descripción
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| Nowadays, the decrease in water resources constitutes one of the main worries for several institutional organisms. Last years, it is observed in the most threatened regions, such as the Mediterranean, an important increase of the groundwater exploitation; due to its easy access and its moderate invest cost. This phenomenon has produced the over-exploitation of numerous aquifers and the degradation of some wetlands that have a high ecologic value. The case of Mancha Occidental aquifer, in Spain, is one of the most important examples at national and international level. This work proposes to study the impacts, on farming systems, of different economic instruments for water management, in order to reduce the groundwater consumption and assure the aquifer sustainability. Therefore, an aggregated mathematical programming model has been built, which simulates the farmer behavior and their responses for different scenarios of water policies at sub-basin level. Particularly, these scenarios are the following: a uniform volumetric water pricing policy, block-rate water pricing system, water use quotas and water rights market. The results show us that controlling the illegal captures is a necessary condition. However, this step is not enough to reduce the irrigation water use to a desirable level. Consequently, other measures in the management of the water consumption will be necessary. Among the proposed systems, the water pricing systems seem the most cost-effective instruments. However, a unique pricing system will not be the best solution for all contexts (efficiency and equity), overcoat at disaggregated level. It seems reasonable to make a combination of the tools proposed, even including additional measures that promote an effective environmental protection. | |
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Internacional
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Si |
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DOI
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Edición del Libro
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1 |
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Editorial del Libro
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CIHEAM-IAMM, Montpellier, France |
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ISBN
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2-85352-369-1 |
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Número de páginas del libro
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179 |
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Serie
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86 |