The CoSuDS project aimed at promoting the transition towards smart stormwater management from a collaborative perspective, bridging the gap between pilot implementation to long-term city strategy. The project co-developed a “CoSuDS Toolbox” used for defining transition pathways in cities, being applied at district level for a city in Spain and integrating multiple actors in the process through collaborative charrettes.

The CoSuDS project analysed alternatives at district scale in Castellón (approx. 170,000 inhabitants, medium-sized city in Eastern Spain) and provided local authorities with outcomes to make informed decisions in terms of energy efficiency, sustainability and risk mitigation, guiding their transition towards improved stormwater governance.

The CoSuDS project undertook collaborative charrettes involving all actors concerning urban development. (A charrette is an intensive planning session where local government, citizens, designers and other stakeholders collaborate for establishing solutions to a given challenge. It provides a forum for ideas, giving feedback to the designers.)

The CoSuDS project covered interactions among three subsystems: water (flood and pollution risks reduction and water efficiency), energy (reducing energy consumption in buildings and the urban water cycle) and built environment (providing additional social and environmental benefits).