Detached house with infiltration lawn, rain garden and ditch (Brøndby 6)
The owner has chosen to manage all surface rainwater in a ditch and a rain garden, and also in a natural hollow in the lawn.
The rainwater from half of the roof area at the front of the house is fed via a concrete trench to a ditch (photos 1 and 2). The ditch is sited along the drive and can be seen from the road. The floor of the ditch is covered with stone and has a permeable base to an underlying soakaway.
Another rain garden is established in the front garden, which infiltrates the rainwater from the other half of the roof area at the front of the house (photos 3 and 4). The rainwater is fed initially to a rainwater barrel (photo 5) before then being fed on through a pipe to the rain garden, where the water can infiltrate.
There is a natural hollow in the back garden to which the rainwater from the roof area at the back of the house is fed and infiltrates (photo 6). A bank made of surplus soil is established at the end of the back garden and is sited along the boundary.
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, 7, 8 and 9.
Photos
