Development of indicators for performance assessment of blue-green infrastructures

The application of blue-green infrastructures in urban areas incorporate various benefits and is thus widely accepted today. However, while aspects of planning and construction are well approved, operation and maintenance are still lacking broad attention. To contribute to the progress in the field, this conference contribution provides a framework for developing related performance indicators and service levels based on an international and well-established European standard focusing on drain and sewer systems. While the standard focuses on grey infrastructure our preliminary results show the adaptability towards more innovative blue-green perspectives. Currently, our work is still on a more theoretic and conceptual level, but an ongoing case study application in a city quarter reconstruction site will show its practicability and support the development of suitable performance indictors and service levels for selected blue-green infrastructures. Finally, building on an existing European standard will make our work easily transferable and adaptable to other European countries and beyond.