Detached house with rain garden and soakaway infiltration (Brøndby 4)
The owner has chosen to manage all rainwater in a large rain garden and a soakaway.
The rainwater from one half of the roof area is fed via a pipe to a soakaway buried along the toolshed. The soakaway has a vent to the rain garden. The other half of the rainwater from the roof area is fed via two concrete trenches to the rain garden, where it is infiltrated. The rain garden is sited centrally in the garden and is the biggest rain garden on the road (photos 1, 2, 3, 4, 5 and 6). The rainwater from a smaller extension is fed via pipes out to the rain garden, where it is infiltrated (photo 7). During extreme rainevents, the water will be dammed up on the lawn and then infiltrated.
The residential road Lindevang in Brøndby Strand forms a starting point for a demonstration project. 15 homeowners have diverted their rainwater from the community sewage system in order to relieve the load on the sewage system with a combination of rainwater gardens, hollows in lawns and soakaways.
The purpose of the project is to develop solutions in respect of civil engineering and regulatory procedures, and also to expand on experience.
This project is part of a collective project in which the road runoff from Lindevang will also be diverted and a Plan B solution for the road and gardens is being examined.
Dimensioning
The project is designed for a 5-year rainwater event. A total of approx. 2,200 m2 of roof surface area has been diverted.
Statement by the contact (advisor/consultant/researcher/producer/utility company/municipality):
"Together with the other initiatives in the area, the project will hopefully allow us to avoid having to extend our sewer systems as much as we would have had to have done otherwise. At the same time, it is reasonable for people to get something out of the rainwater locally instead of sending it all the way here to the waste water treatment plant," says project manager Søren Hansen, Spildevandscenter Avedøre.
Partner
Project owners: Brøndby Kloakforsyning, Spildevandscenter Avedøre and Brøndby Municipality
Advisors: Orbicon and Haveselskabet
Contractors: Per Aarsleff and Lars Voss
See also detached house descriptions 1, 2, 3, 5, 6, 7, 8 and 9.
Photos
