Detached house with rain garden infiltration (Brøndby 7)
The owner has selected a solution in which all rainwater is managed on the surface in two rain gardens. The rainwater from the roof area from the front of the house is fed via a concrete trench to a rain garden, which is located next to the road (photos 1, 2 and 3). A fairly small toolshed is diverted to a rainwater barrel, which, under pressure, sends the water to a greenhouse in the garden (photo 4).
In the back garden, there is a large rain garden in a central location to which the roof at the back of the house and the garage is fed (photos 5, 6, 7 and 8). The water is fed via two trenches to the rain gardens, where it is infiltrated. During extreme rain events, the water will be dammed up on the lawn and then infiltrate. A bank made of surplus soil is located in one corner of the back garden. Some of the roof water is connected to rainwater barrel (photo 9).
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, 4, 5, 6, 8 and 9.
Photos
