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Use of Green Infrastructure to   Reduce Stormwater RunoffMallory Squier, Pavle Bujanovic, Carli Flynn, and Cliff Davidson ...
Background• Combined Sewer System (CSS): the same sewer system is used for both  stormwater and domestic wastewater• Combi...
Onondaga Lake • Large proportion of the source water for Onondaga Lake (up to   20%) comes directly from METRO outflows • ...
GI in Onondaga CountyFactors allowing for rapid adoption of green infrastructuretechnologies:•   Shift in local and nation...
The green roof• Vegetated roof• Benefits:  – environmental  – economic  – aesthetic
Green roof: typical structureComparison of Typical Conventional vs. Green Roof Construction. Liu, 2003.
Green roof: types• Extensive   – Shallow substrate   – Low maintenance   – Limited plant variety• Intensive   – Deep subst...
OnCenter green roof                                • 60,000 square feet                                • Designed to retai...
OnCenter green roof• Extensive   – 3 inches growth medium• Plants   –   Sedum album   –   Sedum sexangulare   –   Sedum ru...
Research goals• Water mass balance over roof  – quantify stormwater captured and delay  – measure precipitation  – measure...
Water Mass BalanceAdapted from Liu, 2003.
Syracuse 2010 precipitation     0.2   0.16   0.12   0.08   0.04-1.39E-1                      Rainfall rate, in/hr
OnCenter drain location
Temperature gradient
OnCenter temperature sensors
Future work• Water chemistry study  – growing medium leachate• Website  – Real-time monitoring  – Accessible to public and...
Special thanks• Matt Millea, Onondaga County• Han Pham & Archie Wixson, Facilities  Management• Matt Marko, CH2M Hill• Khr...
Use of gi to reduce stormwater runoff   squier - sept 2011
Use of gi to reduce stormwater runoff   squier - sept 2011
Use of gi to reduce stormwater runoff   squier - sept 2011
Use of gi to reduce stormwater runoff   squier - sept 2011
Use of gi to reduce stormwater runoff   squier - sept 2011
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Use of gi to reduce stormwater runoff squier - sept 2011

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Use of gi to reduce stormwater runoff squier - sept 2011

  1. 1. Use of Green Infrastructure to Reduce Stormwater RunoffMallory Squier, Pavle Bujanovic, Carli Flynn, and Cliff Davidson Syracuse University and Syracuse Center of Excellence Syracuse COE Symposium 22 September 2011
  2. 2. Background• Combined Sewer System (CSS): the same sewer system is used for both stormwater and domestic wastewater• Combined Sewer Overflow (CSO): overflow of combined sewage and stormwater• CSOs can be reduced by “gray infrastructure” • holding tanks, regional treatment facilities, enlarged central treatment plants• Gray infrastructure is brute force approach• Green infrastructure (GI) technologies used for stormwater management are designed to protect or restore the natural hydrology of a site
  3. 3. Onondaga Lake • Large proportion of the source water for Onondaga Lake (up to 20%) comes directly from METRO outflows • CSOs are a major contributor of bacteria, floating trash, organic material, solids and grit to the lake and its tributaries. Onondaga County • 8 CSO sewersheds • Precipitation “trigger” events as small as 0.10-0.15 in/hrOnondaga Lake , Onondaga Lake Partnership. CSO point , CNY Regional Planning & Development Board.
  4. 4. GI in Onondaga CountyFactors allowing for rapid adoption of green infrastructuretechnologies:• Shift in local and national mindset• Support of all regulating parties• Support of community advocates• Economic opportunities• Reasonably small metropolitan areaApril 2011 Syracuse was named one of 10 partnercommunities by the EPA in their new strategic greeninfrastructure agenda.
  5. 5. The green roof• Vegetated roof• Benefits: – environmental – economic – aesthetic
  6. 6. Green roof: typical structureComparison of Typical Conventional vs. Green Roof Construction. Liu, 2003.
  7. 7. Green roof: types• Extensive – Shallow substrate – Low maintenance – Limited plant variety• Intensive – Deep substrate – Heavier weight load Extensive green roof. City of Windsor, 2009.
  8. 8. OnCenter green roof • 60,000 square feet • Designed to retain 1 million gallons stormwater annuallyGoogle Earth. September 2011.
  9. 9. OnCenter green roof• Extensive – 3 inches growth medium• Plants – Sedum album – Sedum sexangulare – Sedum rupestre – Sedum spurium – Sedum floriferum – Phedimus taksimense Emory Knoll Farms. 2011. www.greenroofplants.com
  10. 10. Research goals• Water mass balance over roof – quantify stormwater captured and delay – measure precipitation – measure growing medium water content• Temperature gradient through roof
  11. 11. Water Mass BalanceAdapted from Liu, 2003.
  12. 12. Syracuse 2010 precipitation 0.2 0.16 0.12 0.08 0.04-1.39E-1 Rainfall rate, in/hr
  13. 13. OnCenter drain location
  14. 14. Temperature gradient
  15. 15. OnCenter temperature sensors
  16. 16. Future work• Water chemistry study – growing medium leachate• Website – Real-time monitoring – Accessible to public and schools• Joint project with SU School of Education
  17. 17. Special thanks• Matt Millea, Onondaga County• Han Pham & Archie Wixson, Facilities Management• Matt Marko, CH2M Hill• Khris Dodson, Syracuse COE• Faculty at Syracuse University and SUNY-ESF

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