Green Infrastructure for stormwater management in Hamburg, Germany

Storm events with extreme precipitation are increasing with climate change. With an expected 2.5 billion people living in cities by 2050, increased sealed surfaces are one consequence. Rainwater has fewer options to infiltrate the ground and replenish groundwater levels. Directly conveyed stormwater and combined sewage overflows lead to pollution of receiving water bodies. The installation of green infrastructure (for example green roofs, bio-retention swales or porous pavements) is one mitigation strategy to minimise stormwater runoff volume.

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