The thematic areas discussed here support the SDGs, with special attention to Goal 6 (“Ensure availability and sustainable management of water and sanitation”). The book is a collection of studies from engineering, social and environmental disciplines and aims at giving a balanced overview of the current , complex discourse on water scarcity and quality. It offers a source of inspiration and information for researchers, policymakers, planners, and practitioners concerning the further development of concepts, approaches, and methodologies for promoting water secure societies.