Immobilien: Diese Fassade soll Städte vor Starkregen schützen
Immer häufiger überfluten extreme Regenfälle deutsche Städte. Ein Fraunhofer-Team hat ein System entwickelt, das Regenwasser in der Fassade speichert – und gleichzeitig Straßenzüge abkühlt.
Regen varies greatly in intensity and duration. In an average August, Germany receives around 78 liters of rain per square meter. During extreme downpours, the same amount can sometimes fall within a few hours. Many cities' drainage systems often cannot handle this volume, causing water to overflow, seeking alternative paths such as into basements.
The Intergovernmental Panel on Climate Change (IPCC) predicts that heavy rainfall events will become more frequent. German Weather Service data also indicates a tendency towards increased heavy rainfall in many areas. This has presented investors, homeowners, and municipalities with a new challenge: the need to prevent flooding.
Ramona Jones, specializing in sustainable water management at real estate consultancy Drees & Sommer, explains that the issue lies in the high level of sealing in cities. To address this, the Fraunhofer Institute for Environmental, Safety, and Energy Technology (UMSICHT) has developed a "Vertical Water Sponge". This is an addition to the "Sponge City" principle, designed to absorb large volumes of water rather than directing it into the drainage system.
Holger Wack, head of department at UMSICHT and leader of the team that developed the facade system, elaborates on the concept.
Written by urgent.news from Handelsblatt's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
