In Grenspark Kalmthoutse Heide, parties have taken a significant step in nature restoration. An innovative phosphate filter purifies historically polluted groundwater in a natural and energy-efficient way before it flows into the vulnerable Dutch natural area Groote Meer. The project demonstrates how cross-border collaboration can lead to stronger nature and water management in a shared landscape.
The purified water benefits the biodiversity in the Groote Meer and the Brabantse Wal nature reserve. Additionally, the improved water management makes the ecosystem much more robust.
Historical Pollution
The phosphate filter addresses pollution caused by former intensive agricultural use in the Steertse Heide, a sub-area of Grenspark Kalmthoutse Heide. The area now functions as one large water catchment basin. The collected rainwater flows through ditches towards the Groote Meer in the Netherlands. Phosphates and nitrates still affect the water quality and disrupt the development of valuable nature. Phosphates remain present in the water system for a long time.
Sustainable Water Purification
The iron sand filter purifies the water without using energy or pumps. The system is an extension of an earlier filter from 2020. The positive results of the first filter have led to the expansion of this sustainable form of water purification. The installation is located in Belgium, but the province of North Brabant provided funding of 1.4 million euros.
More Information
More information about this unique collaboration can be found on the website of Grenspark Kalmthoutse Heide.