Detached house with lawn and soakaway infiltration (Brøndby 3)
The owner has chosen to manage most of the rainwater in two large, existing hollows in the back garden and also in a soakaway.
The rainwater from the roof area at the front of the house is fed via pipes to a soakaway, which is buried along the road (photos 1 and 2). At the back of the house, some of the rainwater from the roof area is fed beneath an existing terrace via a pipe, and via a concrete trench to a natural hollow in the lawn (photos 3, 4 and 5). The water will infiltrate here. At the end of the back garden, a bank made of surplus soil has been established so that the rainwater can dam up on the lawn during extreme rainevents and then infiltrate. The remaining part of the roof area is also drained to a natural hollow in the lawn via concrete trenches. These concrete trenches is positioned along and beneath the vegetation at the edge of the garden (photos 6 and 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 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, 4, 5, 6, 7, 8 and 9.
Photos
