At the Fachsymposium Stadtgrün – Zukunft städtischer grüner Infrastrukturen (Symposium on urban greenery – The future of urban green infrastructure; 12–13 November 2025), organised by the German Federal Ministry of Agriculture, Food and Regional Identity (BMLEH) and the Julius Kühn-Institut, Flora Dicke and Jenny Tröltzsch presented insights from the AMAREX project in the form of a scientific poster. The event brought together experts from municipalities, research institutions and planning practice to discuss innovative approaches for climate-resilient urban green spaces and water management, with a special focus on competition for urban space.

Their poster on Sozio-ökonomische Analyse Blau-Grüner Infrastrukturmaßnahmen zur Regenwasserbewirtschaftung (Socio-economic assessment of blue-green infrastructure measures for rainwater management), showcased key findings from AMAREX, a project that assessed blue-green infrastructure solutions to support the adaptation of urban rainwater management to extreme weather events. Central to the poster are socio-economic assessments of blue-green infrastructure measures, focusing on stormwater infiltration, retention, and drought resilience.

The poster provides insight into three elements of the AMAREX project:

• The structuring of the catalogue of 21 decentralised rainwater management measures, including infiltration swales, optimised tree pits, and green and retention roofs, each described through functionality, design parameters, and effects on water balance.
• A multicriteria analysis comparing measures across environmental, social, technical, and economic criteria. As shown in the diagrams on the poster, solutions with green elements such as swales and green roofs scored highest overall, one key factor being their additional environmental and recreational benefits.
• A cost-benefit analysis, including monetisation approaches for non-market ecosystem services and exemplary results for a choice of decentralised rainwater management measures.