Design of an Intensive Green Roof Based on Native Plant Communities Douglas Daley, P.E., Environmental Resources Engineering Timothy Toland, Landscape Architecture Donald Leopold, Environmental and Forest Biology SUNY College of Environmental Science and Forestry Syracuse, NY 2013 NYWEA Spring Technical Conference, Syracuse, NY
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Design of an Intensive Green Roof Based on Native Plant Communities
Douglas Daley, P.E., Environmental Resources EngineeringTimothy Toland, Landscape Architecture
Donald Leopold, Environmental and Forest Biology
SUNY College of Environmental Science and Forestry Syracuse, NY
2013 NYWEA Spring Technical Conference, Syracuse, NY
Summary
• New building stormwater system will meet hydrologic performance requirements, support efforts to conserve unique ecological resources, and educate ESF community.
• Innovative basis of design: Use native plants from communities along the eastern shore of Lake Ontario
• Design process and lessons learned
ESF Plan: Create a Teaching Landscape
• Leadership and innovation in stormwater management– Onondaga County’s Consent Judgment re CSOs– Midland Avenue RTF Sewershed (grey infrastructure)
• SUNY ESF Teaching and Research Mission– Illick Hall (bioretention, 2010)– Bray parking lot (porous pavement, bioswale)– Centennial Residence Hall (infiltration, bioswale)
SUNY ESF Gateway Center
• 50,000 SF LEED Platinum
• Biomass‐fueled CHP (65% of campus heat, 20% of campus electricity)
• PV and solar thermal
• Stormwater management through bioretention, green roof, cisterns
SUNY ESF, the Gateway Center and Green Infrastructure
Gateway Center Stormwater Management System
Basis of Design: Need for a Green PRoof
• Original (2009) concept by SUNY Construction Fund – Typical extensive green roof using thin soil, sedums
• Small uprising of scientists and designers at ESF– Forward‐looking?
– Creativity of design?
– Are we portraying world‐class environmental science and design programs adequately?
ESF Green PRoof
• Consider intensive green roof– Wider diversity of plant species, including shrubs and trees
– Deeper substrate >4” to 6”
– Park‐like and accessible
– Native vegetation is recommended (NYSDECguidelines)
Role of Vegetation
• Water budget– Promote evapotranspiration– Interception captures about 10% of annual precipitation
• Growing medium captures about 50%• Enhance ecosystem services (values)
– Aesthetic– Habitat– Conservation
ESF Ecologists and Designers Collaborate
• Long‐term conditions of green roofs:– Temperature, wind and moisture extremes– Low soil fertility– Low organic matter content– Thin‐soiled