Bayesian belief networks were used to develop a decision support system in order to give the possibility
to different stakeholders to introduce their points of view in the evaluation of the environmental
performance of a given water management policy. More generally, BBNs seems to be an effective tool
to enable stakeholders’ involvement in the use of decision support systems and to promote their
participation in the decision-making process. In order to extend the method and apply it in practical
situations, it would be necessary to carry out extensive experimental surveys, to obtain the real
responses of river habitats to flow variations, and to complete the stakeholder consultation process,
possibly using the BBN tool.