There is an increasing awareness, on the part of decision-makers, of the need to develop new or to extend traditional evaluation techniques to facilitate a multidisciplinary and participatory approach to decisionmaking. Such an approach would be particularly appropriate for decision-making with respect to the management of natural resources. Not only are there multiple objectives involved in making a decision about natural resource management but many of the identified objectives are competing and conflicting. This paper presents a multiple objective decision support system (MODSS) which was developed to assist decision-making for a catchment in Far North Queensland. The MODSS approach is shown to be a process, capable of incorporating information from a number of disciplines as well as the preferences of identified groups of stakeholders, to support the prioritisation of options to manage land and water resources in the catchment. The final ranking of options is argued to be credible and defendable.