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Green Infrastructure

Green Infrastructure

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Green Infrastructure

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  1. Green Infrastructure Charlene LeBleu, ASLA AICP Associate Professor Landscape Architecture Auburn University

  2. What is Green Infrastructure?

  3. It is the Opposite of “Gray Infrastructure”

  4. Elements of Gray Infrastructure systems include: Roadways and other paved surfaces Utilities and Communications Water supply, treatment and disposal facilities

  5. What is Green Infrastructure?

  6. Green Infrastructure Examples Maintaining the Urban Forest Toronto, CA www. Preservation of Wildlife Habitat Sand Hill Crane

  7. Preservation of Riverside Corridors for People and Nature

  8. Including Natural Filtration Systems such as this Urban Wetland or the installation of rain gardens Rain Garden Boykin Community Center, Auburn, AL

  9. What is Green Infrastructure? • An interconnected network of green space and other environmental assets that conserves the functions of the natural ecosystem and provides associated benefits to people. Adapted from the Conservation Fund, Ed McMahon and Mark Benedict

  10. What is Green Infrastructure? Green Infrastructure is our Nation's natural life support system

  11. Green Infrastructure • An interconnected green space network • Managed for natural resource value • Pre-identifies ecologically significant lands and suitable development areas

  12. What is Green Infrastructure? • A strategic approach to land conservation at national, state, regional and local scales • Encourages land use planning for natural processes, infrastructure and recreational needs of people

  13. Key Ideas of Green Infrastructure • System hubs and linkages • Shapes urban form and provides framework for growth • Encourages natural systems • Not something that is only nice to have but a must have • Promotes and supports conservation action

  14. Interconnected NetworksWays to Interconnect Green Infrastructure Networks Consist of Hubs, Links and Sites

  15. Interconnected Networks • Link open spaces together to function as an ecological whole • This enables them to better: 1) remove pollutants from the air 2) carry and filter stormwater runoff 3) support diverse plant and wildlife species

  16. Interconnected Networks • Wetlands • Woodlands • Waterways • Wildlife habitats • Parks • Greenways • Other open spaces

  17. Ten Principles of Green Infrastructuretaken from Green Infrastructure: Linking Landscape & Communities by Mark Benedict and Edward McMahon, 2006 • Connectivity is key • Context matters • Grounded in science and land use theory and practice • Functions as a framework • Planned and protected before development • A critical public investment

  18. Ten Principles of Green Infrastructure • Benefits nature and people • Respects landowners and other stakeholders • Requires connections within and beyond the community • Requires long term planning & maintenance

  19. Example of Green Infrastructure Ozark, Arkansas

  20. Example--Columbus, GA

  21. Columbus, GA has many parks

  22. Fall Line Trace, Columbus, GA • Part of the City's Rails-to-Trails project. • The linear park stretches approximately 11 miles.

  23. Fall Line Trace, Columbus, GA

  24. Benefits of Green Infrastructure • Air Quality Improvement • Microclimate Modification • Stormwater Management • Enriched Habitat and Biodiversity • Recreational & Transportation Opportunities

  25. Air Quality Improvement It is estimated that 11% of forest cover in Chicago sequesters 155,000 tons of carbon each year. The Chicago Urban Forest Climate Project Chicago’s Urban Forest

  26. Microclimate Modification • Nonporous surfaces absorb and hold heat • Urban temperatures may be 8 – 10% hotter than surrounding countryside

  27. Microclimate Modification Increasing green space by 5% and replacing dark roofs with lighter surfaces could lower overall temperatures 40F U.S. EPA--Los Angeles Urban Heat Island

  28. Microclimate Modification Trees serve as windbreaks

  29. Stormwater Management • Hard surfaces increase runoff and pollutants • Increase in runoff causes flooding

  30. Stormwater Management Green infrastructure provides a low cost nonstructural approach to stormwater design including low impact development (LID).

  31. Enriched Habitat & Biodiversity • A variety of birds & animals indicates a healthy environment • Wildlife move along rivers and streams • Health of habitats depends on size and connectivity

  32. Recreational and Transportation Opportunities Riparian corridors can be used for recreation as well as flood control

  33. Investing in Green Infrastructure Well planned green space increases property values & decreases the cost of public infrastructure

  34. Investing in Green Infrastructure • Investing in green infrastructure can often be more cost effective than conventional public works projects.

  35. Mobile Green StreetsA Green Infrastructure Plan for Mobile, Alabama Charlene LeBleu, ASLA, AICP Auburn University Landscape Architecture School of Architecture College of Architecture Design and Construction

  36. Project Collaborators • Auburn University Landscape Architecture (PI) • Mississippi-Alabama Sea Grant Consortium • Coastal Storms Program • City of Mobile, Alabama • Greater Mobile Area Chamber of Commerce

  37. Project Collaborators • 2-D Design, LLC, Birmingham, AL • Downtown Mobile Alliance • Envision Coastal Alabama • Coastal Alabama Clean Water Partnership • Alabama Cooperative Extension System

  38. Methodology • Assessment of existing conditions • Case Study Analysis • On-site Design Charrette • Design concepts & graphics • Cost Analysis for Green Street Retrofits • Professional oversight • Template for technology transfer

  39. Location Downtown Mobile, AL City of Mobile, AL

  40. Location: Project Area Located in downtown Mobile, AL

  41. Existing Conditions There is need for a site design that promotes infiltration!

  42. Existing Conditions rain gutter detachment poor infiltration results in localized flooding

  43. Existing Conditions • Lunch-time thunderstorm caused localized flooding on Dauphin Street. • The Warehouse Market used sandbags to block water from entering the front entrance to the antique store. "If I owned the building, I could sell it as waterfront property.” Mobile Press Register Friday, Sept. 18, 2009 Dauphin Street in midtown Mobile, Ala.

  44. Case Studies—Portland, Oregon

  45. Case Studies—Seattle, Washington

  46. Who is building green streets? • New York City, NY • Boston, MA • Chicago, IL • Jacksonville, FL • Atlanta, GA • Denver, CO • Auburn, AL Jacksonville, FL Green Streets And many more cities across the nation!

  47. The Charrette • Stakeholder and community input • Collaboration and education

  48. Adaptive Reuse of Materials Boat Cistern

  49. Possibilities for Green Retrofits • Existing tree lined streets can be retrofitted for implementing bioretention