Clean Rivers, Clean Lake -- Rooftops to Rivers Study-- Karen Hobbs
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Clean Rivers, Clean Lake -- Rooftops to Rivers Study-- Karen Hobbs
- 1. Smart, Green Solutions to a Major Water Pollution Challenge Stopping Runoff Pollution and Sewer Overflows Karen Hobbs Natural Resources Defense Council
- 2. Natural Conditions Courtesy: May, U of W 2
- 3. Developed Conditions Courtesy: May, U of W 3
- 4. Urban Stormwater Runoff: Pollutants bacteria trash nutrients heavy metals pesticides suspended solids 4
- 5. Combined Sewer Overflows Newtown Creek, Brooklyn Image: Riverkeeper Image: Seattle Public Utilities
- 6. Green Infrastructure as a solution: What is Green Infrastructure? Portland streetscape Navy Yard Bioretention Photo courtesy of Martina Keefe Photo courtesy of LID Center
- 7. Portland’s stormwater street planters. Photo courtesy of the Portland Bureau of Environmental Services. NRDC, Stormwater Strategies Chicago City Hall Green Roof. Photo courtesy of Permeable Pavement, City of Portland, BES Roofscapes, Inc.
- 8. Green Infrastructure as a solution: Other non-water benefits • Reduced energy use • Increased property values • Improved air quality • Lower air temperature • Reduced urban heat island effect • Conservation of water
- 9. Overview: Rooftops to Rivers II • Demonstrates how cities use green infrastructure to improve stormwater management and achieve multiple benefits. • The report includes: – Economic benefits of green infrastructure – Case studies on 14 cities – Encouragement for EPA to learn from the work of these cities and advance these solutions nationwide
- 10. NRDC’s Emerald City Metric
- 11. Philadelphia • Green City, Clean Waters plan – creating an urban network of GI over the next 25 years
- 13. Syracuse • 1st community in the U.S. to have a legal requirement to reduce sewage overflows with GI
- 14. Milwaukee • MMSD: regional & national wastewater utility leader in its integration of green infrastructure into its combined sewer overflow reduction strategy • No consent decree • GreenSeams
- 15. Milwaukee
- 16. Portland • Retention standard – January 2011: new development and redevelopment projects must capture and treat 80% of the average annual runoff volume on site
- 17. Economics of Green Infrastructure
- 18. What Needs to Happen? EPA Regulatory Improvements Critical
- 19. Questions? www.nrdc.org/stormwater switchboard.nrdc.org – search: “green infrastructure” Karen Hobbs: khobbs@nrdc.org
Notes de l'éditeur
- Under natural conditions, very little surface runoff occurs. The vast majority of precipitation either infiltrates into groundwater or goes into the atmosphere as water vapor.
- By contrast, developed land significantly contributes to runoff.
- In addition, in many areas, particularly in the Northeast and Great Lakes regions, stormwater and municipal wastewater is carried in the same pipes, and the combined system is designed to overflow to surface waters in certain rain events. That means untreated domestic sewage going to our waterways.