Rockflow® filterbuffer

Treating and infiltrating stormwater runoff with Rockflow stone wool

Climate change is causing more weather extremes. In recent years, examples abound of problems caused by water shortage and flooding. One of the solutions is the storage of rainwater to prevent flooding during peak showers.

The infiltration of rainwater (instead of drainage) is increasingly common and contributes to climate adaptation strategies. The infiltrated rainwater replenishes groundwater and takes pressure off the sewers. 

Our groundwater is an important source of drinking water. Unfortunately, the quality of our water bodies is under great pressure due to pollution. Therefore, ensuring the quality of our surface water and groundwater is a growing concern.

Rainwater runoff that has come into contact with roads and roofs can contain pollutants, which we do not want to infiltrate into the soil or end up in our surface waters. Therefore, it may make sense to filter pollutants from runoff rainwater before allowing it to infiltrate or to discharge the water.

Rockflow® filter buffer: an infiltration system that captures pollution - with the power of stone

Stone wool is an effective filter medium for common pollutants found in run-off water, such as solids, oil and PAHs, heavy metals and fertilisers and nitrate.

Read more about the filtering properties of stone wool here

If a project site requires water treatment measures, a Rockflow system can be designed so that the water is filtered through the Rockflow stone wool before infiltrating. Together with the client, we then look at the pollution load and its desired reduction and create a design and maintenance plan in line with the requirements.

A filter buffer is therefore always tailor-made, as environmental factors, such as local water quality and precipitation events, determine the exact filter performance and maintenance required.