MARTA DERSKA MARIA PLESNIAK
Why rain garden? urban development = increase sealing of the surface bigger surface runoff = possibility of overflood bigger surface runoff in cities = more polutants in water
rain gareden is a method of dealing with the surface runoff
What is a rain garden? • • • •
sustainable development feature helps to keep water on the side lower area with drought/flood tolerant plants runoff is collected and can infiltrate instead of going to the sewer system
What is a storm water chain? green roof green roof stormwater planter rain barrel
retention pond rain garden •gully
It is a bigger sytem incomporating rain garden with other elements.
How does stormwater chain work? • • • •
infiltration (soaking water into the ground) evapotranspiration storage (collecting water) conveyance
How rain garden control water quality? Urban runoff can be polluted with: • sediments • nutrients • bacteria • heavy metals • pesticides
Water purification in rain garden is based on physical, chemical and biological processes: • bioremediation • phytoremediation
selection of plants with complex root system help setting sediments and pollutants
What we can gain from rain garden? • • • • •
better local microclimate more wildlife and biodiversity in urban areas cost savings visual and sensory pleasure alert society about …
• sustainable water management
Multi-story residental house •
located in Nørrebro, Copenhagen
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common courtyard surrounded by the housing blocks
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the storm water run-off is directed through the rain pipes into city drainage system
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pervious surfaces less than 10%
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no visible level difference, courtyard is flat
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vegetation covers ~10% of the courtyard
Why rain garden in this place? •
building represent very popular housing scheme in Copenhagen
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representative to create an example of rain garden as environmentally friendly and easy to apply solution
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if successful, it might become an obligatory feature for both new and existing housing developments in Copenhagen
New Design
Wavy lines of gullies are creating the paths for water runoff and enrich the design of pavement.
New Design
Required water movement on the site, according to the new design
Project detail – stormwater planters and gravel containers
Project detail – raingarden
Project details - playground
Plants