Prioritization of stormwater management sites in urban areas.

Multiple pressures as urbanization, densification and climate change lead to the need for adaptation of sewer systems within urban environments. To increase the adaptive capacity of stormwater management systems, there is a shift towards decentralized nature-based solutions (NBS). Especially in densely built areas the availability of land can be a limiting factor for the implementation of NBS. To consider the spatial framework conditions in planning we developed an integrated modelling framework for prioritizing sites for NBS implementation for stormwater management within built urban structures. The implementation potential of NBS from a settlement structure model and a street typology model are combined with the discharge reduction potential from a sewer model. In effectiveness matrices priorities for stormwater management sites for individual NBS are identified. This modelling framework offers a transparent and flexible approach to decision making for the implementation of NBS.