Detached house with lawn and rain garden infiltration (Brøndby 9)
The owner has chosen to manage all rainwater on the surface in a rain garden and in a newly established hollow in the lawn.
The rainwater from the roof area at the front of the house is fed via a concrete trench to a rain garden (photos 1, 2, 3 and 4). The rain garden is sited next to the road and its floor is filled with stone. A soakaway is buried beneath part of the rain garden, to which the water the raingarden infiltrates. In the back garden, a new hollow is established in the lawn with a bund made of surplus soil on the outer side (photo 5). The owner has established a campfire area in the hollow. The rainwater from the remaining part of the roof area on the house is fed beneath the terrace in a pipe and on to the lawn, where the water runs on down to the hollow and infiltrates (photo 6). The rainwater from the covered patio is fed to the hollow via a concrete trench sited in the lawn (photo 7).
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 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, 4, 5, 6, 7 and 8.
Photos
Photo 1
Photo 2
Photo 3
Photo 4
Photo 5
Photo 6
Photo 7