Models and other decision support tools have been widely applied in natural resource planning and management to optimise meeting water delivery needs for rural and urban uses. Only recently have models and decision support tools broadened to incorporate environmental requirements explicitly, where ecological objectives, such as wetting requirements for ecological function and process needs, are included. Such tools range in their sophistication, where water requirements are treated simply as nodes in a hydrological model to more sophisticated integrated hydrology-ecology response models. This session invites papers that explore models and decision support tools that explore water requirements for achieving ecological objectives, and encourages papers to look at the advantages and limitations associated with methods used, and to make recommendations for future advances in this domain.