This collection of papers represents the outcomes of the International Symposiumheld in Delft, The Netherlands, on June 13-15, 2007, at the occasion of the 50thanniversary of the UNESCO-IHE Institute for Water Education. The papers discusshow to contribute to the sustainability of effective international development andwater management with a digest of lessons learned on local knowledge and capacitydevelopment. Authors expose recent research, strategies and policy positions.Water for a Changing World starts with an introduction and overview of the waterresources and the water supply and sanitation sectors in developing countries andworldwide. Topics of these reviews are water security, environmental integrity, thenewest earth system science technologies, integrated urban water management, andthe global-local nexus of water governance. The second part presents positions oncatalyzing and disseminating knowledge and capacity development in response to thecurrent challenges and opportunities. It consists of a variety of papers on theory andanalysis of capacity development, methods and case studies, and policy positions.The authors represent a diverse and representative group of prominent actors,practitioners and academics within the water, sanitation and development sectors.