Separating rainwater from wastewater in existing living areas

In Risvangen/Vorrevangen in Aarhus rainwater is handled on the surface using various SUDS elemements

Sewer separation projects are often conducted by establishing separated piping systems for rainwater and wastewater, respectively. In the neighbourhood Risvangen and Vorrevangen in the city of Aarhus, however, no rainwater pipes are dug down.

Instead, all rainwater is handled on the surface using various SUDS elements. The local citizens can either choose to handle rainwater on their own plots and in return receive a financial reimbursement of the connection costs. Or they can choose to lead the water to a nearby public area via the surface, where Aarhus Vand handles it.

Getting the citizens on board the project was a difficult, yet crucial task. While some house owners embraced the new recreational solutions, the project was also met with some resistance from more sceptical citizens. The project team therefore had to be very thorough and convincing in their approach and extensive efforts were made to make sure the citizen involvement process was steered in the right direction.

A combination of workshops, extensive FAQ’s and even individual advisory sessions on private plots were conducted to ensure a successful implementation.

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