MARIA PLESNIAK landscape architecture student
What a sustainable development is? (The Brundtland Commision, 1987)
• development that meets the needs of the present without compromising the ability of future generations to meet their own needs • 3 dimensions of sustainability: environmental, economic and social EN S – Social
S
E
Global Development Up to 1987
E – Economic EN – Environmental
S
E
Global Development After 1987
What is a rain garden? • • • •
sustainable development feature helps to keep water on the side lower area with drought/flood tolerant plants rainwater is collected and can infiltrate instead of going to the sewer system
Why a 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 storm water chain? green roof green roof stormwater planter rain barrel
retention pond rain garden
•gully
It is a bigger system incorporating 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 it alert society about …
sustainable water management