Circular Water Network Antwerp: Managing risks and seizing opportunities to increase biodiversity

Sweco’s latest Urban Insight report highlights the importance of biodiversity and offers practical advice to help businesses tackle the issue. Managing risks and seizing opportunities are an important step towards sustainable biodiversity management. Circular Water Network Antwerp illustrates how one city is putting it into practice and boosting its climate resilience as a result.

Water reuse keeps Antwerp green

The City of Antwerp is fully committed to circular water use. By treating and reusing surface and drainage water that would otherwise be lost, the city reduces pressure on drinking water resources and keeps its natural environment healthy. This not only enhances biodiversity in parks, ponds, and the Antwerp Zoo, but also helps restore groundwater levels.

Managing risks: A buffer against desiccation

Climate change is resulting in more frequent droughts and low groundwater levels. For Antwerp, this means additional risks: brackish water from the River Scheldt can enter the groundwater table, damaging urban nature and the foundations of buildings. The City is keeping these risks under control by cleverly deploying treated water through a circular network of pipes.

Seizing opportunities: Making smart use of water

The circular water network creates new opportunities. An estimated 3,500 m³ of water can be recovered daily – good for 25,000 swimming pools a year. The water is used to replenish the groundwater table, irrigate urban greenery, refill fountains, and as grey water in public buildings. It enables the city to contribute to a living environment that is cooler, healthier, and more biodiverse.

Sweco as the guide in complex water management

The project is a joint initiative of the City of Antwerp, water-link, ZOO Antwerpen, AG Vespa, Flanders Environment Agency (VMM), and Aquafin, with support from Flanders and the European Union. Sweco supports Antwerp every step of the way: from feasibility study and design to stakeholder management and implementation. With expertise in hydraulic infrastructure, water management, climate adaptation, and treatment, Sweco ensures that the circular water network pays off in both technical and ecological terms. Smart construction techniques also minimise disruption to residents.

Discover the five steps to strengthen biodiversity as a company in the Urban Insight report.