The overall purpose of the project was to improve water policy and decision-making at local, national, and basin levels so that these could take informed account of the flow requirements of socio-economically important river fisheries. The project sought to achieve this by providing state of the art information on the value of tropical river fisheries and the impact upon these of changes in water flow, and by providing guidance for the development of practical tools for predicting the impact of changes in river flow regime on ecological systems, the fisheries they sustain, and the communities that depend upon them. A comprehensive review of existing information and tools was carried out, identifying their strengths and weaknesses, testing integration, and providing guidance on the further development and testing of improved tools with stakeholder groups in selected river basins.