Tree trenches for quality of life in Hagen

The German City of Hagen lies on the edge of the Sauerland low mountain range and has a hilly topography. Four rivers – the Ruhr, the Volme, the Lenne and the Ennepe – run through the city. As a result, large parts of the city are at risk of flooding, especially during heavy rainfall events. As part of a pilot project, specially developed innovative tree trenches (or tree drains) are now being planted. These are designed to make the city safer, more climate-resilient and thus more liveable.