The catalogue is meant for better provision of information on groundwater management tools, measures and instruments, encompassing a supply and demand, groundwater protection and stakeholder participation. It connects the Topics (i.e. societal and environmental issues, problems), the Services (the role of groundwater in the topics) and the Measures (and tools and Instruments, i.e. possible solutions). In this way, the catalogue assists policy- and decision-makers in exploring suitable solutions for complex groundwater issues, based on factsheets, case studies and references (read further in about us).