Green Infrastructure for Engaging Communities
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This document discusses how green infrastructure and low impact development (LID) strategies can help create vibrant communities. LID aims to manage stormwater close to its source through small-scale integrated controls that minimize impervious surfaces and prolong water flow. Conventional drainage has limited effectiveness and urban growth is impacting watershed health. LID techniques like bioswales, porous pavement, green roofs, and rainwater reuse can help reduce runoff volumes while providing water treatment, infiltration, and community benefits like aesthetics, education, and property values. The key is planning LID approaches at the site, neighborhood, and watershed levels.
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Green Infrastructure for Engaging Communities
- 1. Creating Vibrant Communities Green Infrastructure for Engaging Communities Elizabeth Balderston August 13, 2013
- 2. Spirit in Service for Vibrant Communities
- 3. Elizabeth Balderston Green Infrastructure for Engaging Communities
- 4. Low Impact Development Creating Vibrant Communities Liliana Bozic Elizabeth Balderston August 2013
- 6. LID Low Impact Development SUDS Sustainable Urban Drainage Systems WSUD Water Sensitive Urban Design BMP Best Management Practices SCP Source Control Practices
- 7. LID is an approach to land development that works with nature to manage stormwater as close to its source as possible Key principles: Preservation of natural soil infiltrating potential; Small scale integrated controls dispersed throughout the site; Minimizing and disconnecting impervious areas; Prolonging stormwater runoff flow paths and times Creating multi-functional landscapes.
- 8. Today’s challenges: Urban growth impacts watershed health Limited effectiveness of conventional drainage practices Regulatory requirements Climate change
- 9. Land development alters the natural balance between runoff and natural absorption • greater amounts of impervious surface • increased rates and volumes of surface runoff • increased susceptibility of eroded land to flooding, • damage to public and private property • in-stream and wetland habitat degradation
- 10. Limited pollutant removal • Effective for large sediment particles only • Limited nutrient removal No runoff volume reduction Concerns with winter operation High maintenance cost
- 11. New regulation requires better stormwater quality treatment Stormwater rate and volume control targets are established through watershed management planning process
- 12. 12 Watershed Drinking Water Wastewater People Bow & Elbow River Land Use •Source protection •Watershed Yield (Glaciers) •Water resources •Water rights •Water Quality •Pollutants •Collection infrastructure •Total loadings •Assimilative capacity •Supply and demand •Service levels •Treatment Infrastructure •Drinking water quality •Distribution infrastructure •Imperviousness •hydrology •Storm water infrastructure Storm Water •Urban runoff
- 13. Bioswales / Vegetated Swales Shallow and deep infiltration Low susceptibility to cold climate Treatment Porous pavement Shallow and deep infiltration Low to high susceptibility to cold climate Treatment Green Roofs Shallow infiltration Low susceptibility to cold climate Volume reduction Rainwater reuse Volume reduction
- 14. Plan at Site, Neighborhood, and Watershed Level
- 15. A variety of easy and practical, cost-saving techniques to manage stormwater runoff close to its source (where rain falls) while preserving and protecting natural landscape features Principles of Low Impact Development
- 22. ≠
- 30. Courtesy Cultec
- 33. Stormwater oriented low impact development strategies contribute to Vibrant Communities on multiple fronts: • financial infrastructure – construction, repairs, maintenance, operation natural and environmental disasters environmental services property values and development costs • community resources community health delight / aesthetics education community interaction
- 40. Low Impact Development is a creative design strategy that informs development opportunities on how to better connect with the surrounding energetic, ecological and social patterns to promote integrative sustainability. Key principles: Designing with the environment and the land Give priority to social dimensions and environmental protection Do we need it? Can we maintain it? Is there a solution requiring fewer interventions? Is it local, integrated and decentralized?
- 46. Next lecture: Tuesday September 17 Mark Anielski Creating Flourishing Communities of Wellbeing and Happiness www.urbansystems.ca
Editor's Notes
- There are a number of interdependencies in how we use water in Calgary. We rely on our watershed to sustain the Bow and Elbow Rivers. We extract water for our potable use and we treat wastewater to a high standard and use the rivers to assimilate the final pollutants. The people change the landscape and the land use and this changes the nature of the rainfall that makes it back to the river as stormwater.All of these dependencies make it easy to see where climate change in this region will affect our water resources the most.NEXT SLIDE
- Biophilia – connection to nature and water
- With this definition in mind we can easily see how LID may impact other areas of development such as: transportation, energy, urban formIt is important to promote the social dimension of LID and how it promotes a vibrant community.
- Efficiencies in transportation, energy, urban form, hillside development
- Stormwater integrated into site development as an amenity
- Multi-functional spaces for employment and enjoyment
- Re-use of on site materials
- Designing with the environment and the land – swales, no retaining structures, no plastics – natural materials