This thesis examines the recreational use of a multi-functional resource, the Avon-Heathcote Estuary. The nature resources suitable for outdoor recreation in the Christchurch area and the present use made of them are explored through a demand-supply framework. Although exploratory, the research into recreational use of an estuarine environment advocates the need for a greater understanding of resource capabilities and use requirements. To this end, a framework which examines both user and resource is described. Recreation resources within the study area are identified and examined with respect to quantity, quality and distribution. Recreational demand is analysed in terms of measures of recreationalists' attitudes preferences and activities. The diversity of functions provided by the Avon-Heathcote Estuary means that recreation must be considered in relation to other uses. In view of the expected growth in recreational use of the Estuary the notion of carrying capacity is introduced. The capacity concept is discussed within the wider context of maintaining user satisfaction and conserving the estuarine environment.