Changing climate conditions will imply heavier rainfall in Denmark putting a growing pressure on wastewater treatment and sewer systems. Paved surfaces in urban areas prevent infiltration, and instead the rainwater is led to the sewers, which have limited capacity, resulting in overflow and outlet to lakes and harbours with the risk of potential water contamination of vital natural habitats. Rainwater from urban areas is not clean and must not be discharged directly into our lakes, streams and the sea. The rainwater contains large amounts of sand and nutrients, which bind to particles in the rainwater.

Origin/team:

The Municipality of Viborg

Energi Viborg

Møller & Grønborg

Orbicon

Svend E. Madsen

The Danish Foundation for Cultureand Sports Facilities

Realdania

Vandplus

The Danish Nature Agency

Photography:

Carsten Ingemann

Resources:

mgarkitekter.dk

The Municipality and Utility of Viborg, Denmark, created the recreational area sØnæs to expand the treatment facilities of the urban area with a multifunctional wastewater treatment park. The cleaning pond is cleaning rainwater from rooftops and roads from separate sewer systems in Viborg, before the rainwater is discharged to Sønder Lake. The discharged rainwater derives from an area of 50 ha. corresponding to 100 football fields. The water surface in the cleaning pond is approximately 2.6 ha. The team combined the need for climate adaptation, wastewater treatment, recreational facilities, climate-change education and improvement of nature and environment in one. The area facilitates water-related sports and playgrounds, and puts the treatment techniques, water circulation and natural resources on display. Parts of the park have a permanent water surface, while other parts are designed to be resistant to flooding. The cleaning process in the cleaning pond is carried out by sedimentation. The water in the large cleaning pond is almost stagnant, which will cause sand, particles and impurities to seek to the bottom. In this way, the water is purified and can be discharged to the lake. In case of an extreme rain event, the water will flow from the treatment basin to several overflow basins ensuring that the water is always clean before reaching the lake.

sØnæs
sØnæs
sØnæs
sØnæs
sØnæs
sØnæs
Location of sØnæs
Location of sØnæs

Sign up for updates

Would you like to receive updates on Goals and Architecture and the World Congress of Architects?

©2020 All rights reserverd

This website uses cookies to improve your experience, learn more here.

Got it.