Direttiva quadro delle acque e tariffazione dei servizi idrici: impatto sulle aziende agricole del Consorzio di bonifica Maremma Etrusca di Tarquinia
Author(s)
Cortignani, Raffaele
Date Issued
April 22, 2008
Type
Doctoral Thesis
Abstract
The directive 2000/60/EC draws up a framework for the protection of the waters in the European
Union. The Member states can use economic instruments to obtain the established goals. In
particular one must take account of the principle of recovery of water services, including
environmental and resource costs. Actually water cost considers only a part of financial costs and
therefore there will be an increase of cost: this could have relevant economic, social and
environmental effects.
The thesis values the possible impact of an increase of water cost on agricultural irrigated area
situated in a coastal area of the central Italy. The used methodology is the Positive Mathematical
Programming (PMP) and in particular the Arfini-Paris approach (1995) whit the introduction of a
exogenous data on the land value. In particular two sets of simulations have been carried out: an
increase of the water costs in all irrigation periods and an increase only in the summer. Moreover
the analysis points out merits and limits of the used methodological approach.
Simulation results show that increasing water costs do not reach satisfying goals concerning the
water conservation. In fact there is a small reduction of the water consumption also with large
increases of water cost.
The increase of the water cost determines a more extensive cropping pattern, a limited worsening of
the economic results and a decrease of the revenues of the irrigation board. The increase of water
cost only in the summer determines a impact more limited on farmers economic results.
The analysis has shown that the PMP methodology can be used also to study water resource
problems and policies. The more large limit is that it is not possible to consider new irrigation
techniques nor crops not observed in the base situation.
Additional information
Dottorato di ricerca in Politica agraria
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