Introduction
At the property’s recycling house there is an extensive wetland / wet meadow with native wet meadow plants. The vegetation is divided into sections of lush dry-meadow vegetation (about 70 %) next so sections of lower vegetation with mainly sedum (about 30%).The main purpose of the roof is to offer an unique green environment to the residents in the house. In the project every surface, also on the ground below, is maximized with greenery. The greenery offers a range of ecosystem services which also benefits the neighbors and the city.
Multifunctional urban greening in Malmö, Sweden
Reason to Be Selected
Though this is really a small project,it is highly feasible and lowcost.Also,it works very well during long time of extreme drought period.The wetland roofs can help to increase biodiversity and increase penertration rate of rainwater.
Highlights:
Biodiversity
Water
Recreational value & accessibility
Sustainability
Details
Biodiversity: The plants selected are by 90 % native plants in Sweden and/or the region, mainly meadow plants but also sedum and shrubs. The total number of different plant species included at the installation is more than 60.
Water:The main roofs substrate depth will in itself absorb a lot of rainwater.Rainwater from the large roof top is also led down to the wetland roof, which has a high capacity of storing water.
Recreational value & accessibility:At the large roof on top of the main building a roof deck and orangery is available the whole year for all tenants living in the house.Also the wetland roof is viable for most of the tenants and has a specific design.
Sustainability: The main component of the green roof substrate used is crushed bricks and green waste compost. The manufacture of the green roof substrate was also asked to take away the LECA that they normally include in their extensive substrate.
The main roofs substrate depth will in itself absorb a lot of rainwater.The roofs are installed with varied substrate depth to support plant diversity.The substrate is at some parts mixed with a little bit of shingle.The limestone will make phosphorus less available to the plants and thus in this areas of the roof potentially“support” the less competitive meadow plants.The wetland roof has some small areas with open ponding water which is a potential water resource for insects and birds.Rainwater from the large roof top is led down to the wetland roof, which has a high capacity of storing water. The roof has a rim of 150 mm where the waterproofing is pulled up on the sides and the drainage point is located 120 mm above the roof surface. Thus the roof will have a high capacity of both holding rainwater and also slow down the run off speed.At the large roof on top of the main building a roof deck and orangery is available the whole year for all tenants living in the house.The wetland roof is viable for most of the tenants.
Conclusions
The innovation mode of combine wetland/wetmeadow with green roof not only creates great environment value,but also help to reduce the risk of flooding for its large capacity and penertration rate of rainwater. It also provides an easy way to adapt climate change.
FULL STORY:
Multifunctional urban greening in Malmö, Sweden
Published on Thursday, October 18, 2018
TOPICS | Malmö | Intelligent | Enviroment
Reference：
Oppla
https://oppla.eu/casestudy/19011
