Ecological versus Economic Objectives: A Public Decision Making Problem in Agricultural Water Management
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The planning of a new in·igated area is a complex problem where a multiplicity of very
different criteria (economic, ecological, social, etc.) have to be taken into account. A lexicographic goal
programming model capable of handling this multiplicity is formulated. The methodology is applied to
the planning of the irrigated lands of the village of Tauste in Arag6n (Spain). An important result
generated by the model is the conflict between economic criteria and environmental effects such as "saltload,"
which affects the water quality in the basin. This matter is thoroughly analysed by determining
the transformation curve between "salt-load" and the investment outlay in the irrigation systems
discussed.