The Northwestern part of Overijssel in The Netherlands is an area wher
e water management is characterised by various interrelated and often
conflicting functions. To safeguard a sustainable use of water in this
area, decisions have to be made. However, these decisions involve lar
ge amounts of complex and uncertain information. Using models and deci
sion-methods, this information can be made available and understandabl
e, in order to support decision-making and help water authorities to c
hoose those measures that best meet the policy objectives. In this pap
er the usefulness of these models and decision methods, combined in an
integrated decision support system, and the sensitivity of the decisi
on support system, is discussed. Copyright (C) 1996 IAWQ.