Above-ground systems such as swales and rain gardens are a great solution for rainwater harvesting and increasing biodiversity in urban areas. Unfortunately, the space available for their application is limited. The swale quickly becomes too deep, too steep or too large to really meet future water storage requirements. And how do you ensure that the collected water remains available for as long as possible during dry periods?
Rockflow is a particularly flexible and effective system for collecting, retaining and infiltrating rainwater, consisting of naturally fully circular stone wool elements. As part of climate adaptation, Rockflow is being used in more and more cities to prevent flooding. The material can also retain rainwater for drier periods. These two functions - blue: infiltrate water and green: retain water - are combined in the Rockflow blue-green swale.
By installing Rockflow stone wool elements beneath the swale, sufficient water storage capacity is created, without the swale becoming too deep, too steep or too large. This makes the swale safer and easier to maintain. The green appearance on the surface is maintained. And the plants have a more stable water supply during dry periods thanks to an extra water-holding layer of stonewool right under the plant substrate.