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Problems of Water Distribution Networks (WDN) due to the aged infrastructure range from structural to hydraulic and they may lead to inadequate supply, causing the water loss indexes to rise leading to user dissatisfaction. In this context, the decisions about distribution network rehabilitation are complex, not only because of their importance, but due to the great number of possible alternatives and the criteria that can be used to evaluate them, as well as existing conflicts, such as cost of the alternatives versus their benefit. This article, therefore, proposes a model of an information and decision-making system that, besides collecting data and supplying information that is relevant to the problem, helps the stakeholder to really decide which rehabilitation alternative should be adopted for each problem diagnosed, considering the multiple evaluation criteria involved. It is thus expected to make the integrated process of water distribution networks easier, to provide a satisfactory quantity and quality of service to the population. Key-words: Information and decision-making systems, water resources, water distribution networks , rehabilitation interventions

Modelo de Sistema de Informação e Decisão para Intervenções de Reabilitação em Redes de Distribuição de Água