portland ecoroof program
TRANSCRIPT
Portland Ecoroof Program
Sustainable Stormwater Division
Bureau of Environmental Services
City of Portland
Tom Liptan, Landscape Architect 503
823 7267
www.portlandonline.com/bes
Pollinator on Portland EcoroofCristo, my grandson
Portland, Oregon
Portland, Oregon 1804
Portland today
20 sq. miles rooftops
45 sq. miles pavement
Portland Tomorrow
35 sq. miles rooftops? sq. miles pavement
Total land/water area 140 sq. miles
Portland Industrial District
Conventional Roofs
High stormwater runoff volumes and peak flows.
Health issues; heat, glare, mosquitoes.
Roofs are fraught with problems Are they sustainable?
Ecoroofs on industrial buildings in Linz, Austria
Ecoroof
Ecoroof
Ecoroof
EcoroofEcoroof
Ecoroof
Ecoroof Design
Drainage Mats Drainage Channels
My Garage Ecoroof installed 1996
City of Portland Ecoroof Program
• Technical Assistance
• Outreach and education
• Industry Development
• Performance Monitoring
• Financial Incentives
• Zoning Code Bonus 33.510
• Cost and Technology Analysis
• Public Works Code Option 17.38
• City policy, ecoroofs on city owned buildings
• Partnerships: Academia, Building Owners, Industry, Trade Organizations, Regulatory Agencies
Dragonfly takes flight
from downtown ecoroof
Multnomah Co. Building before Ecoroof
Multnomah Co. Building with Ecoroof
Portland Building Ecoroof
Portland Building Mechanical Penthouse before EcoroofPortland Building Penthouse Before Ecoroof
Portland Building PenthouseEcoroof
Portland Building Ecoroof
Portland Building Ecoroof
M Financial Ecoroof
Swan Island Pump Station
Solar hot Water and PVs on Village Ecoroof
PV Units over ecoroofs
Turning Torso Building - Malmo, Sweden
Stormwater
Raingarden
Stormwater ManagementEcoroofs work; but not all are equal; is it the growing media (soil)?
• Ecoroof Annual Rainfall Retention– Hamilton west 58%: 4.5 inch media
– Hamilton east 24%: 2 inch media
– Garage 29%: 2 inch media
– Multnomah Building 15%: 6 inch media
– PSU Building 25%: 4 inch media
– Metro Ecoroof _?_: 3 inch media
– Portland Building Ecoroof 67%: 3 inch media
– OSU 26 Test Plots ? 4 inch media
• Ecoroof Peak Storm Intensity Mitigation– Hamilton west 97%: 4.5 inch media
– Hamilton east 90%: 2.5 inch media
– Multnomah Building 86%: 6 inch media
– Portland Building 93%: 3 inch media
• Ecoroof water quality– Hamilton east & west: high copper, zinc and phosphorous.
– Portland Bldg: copper, zinc, Lead and phosphorus.
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City of Portland
Ecoroof Cost AnalysisTopics evaluated
» Stormwater Management (private)
» Energy
» Roof longevity
» HVAC (heating and cooling equipment)
» Stormwater (public)
» Carbon reduction
» Air quality
» Habitat
Topics to be addressed in future studies
» Urban Heat Island Reduction
» Carbon Sequestration
» Building Envelop and Acoustics
» Amenity
» Property value
» Open space
» Biodiversity
» Watershed Health
» Human Health
» Jobs and industry
Portland Grey and Green Initiative:
Natural Areas Restoration
Raingardens,
Green Streets,
Ecoroofs,
Urban Trees,
PORTLAND
ECOROOFS
square footage acreage number
Total Built 370,260 8.5 139
Grey to Green - post July 1, 2008
Known Potential 190,500 4.37 28
In Design 75,990 1.74 15
In Construction 95,650 2.2 9
Complete 100,188 2.3 12
Tabor School before rain-garden
Tabor School Rain-garden
Mt Tabor School Raingarden/Urban Cooling Garden
OMSI Parking Lot Stormwater Infiltration Swales
Drawn by: Kevin Perry
NE Siskiyou Green Street – Stormwater Curb Extensions
Before
After
Sandy Blvd - Infiltration Planter
Design 2005
Ecoroof
Sandy Blvd - Infiltration Planter 2007
(2001 Photo)
Tryon Creek Headwaters Project
Rain garden
Creek Restoration
Daylighted CreekEcoroof
Creek
Improvement Street Removed
Tryon Creek Headwaters
Apartments and Rowhouses
Tryon Headwaters - before
Tryon Headwaters - after
Does the city need this street and grass traffic separator?.
Street removed: New Creek, plantings still to be completed
Headwaters Raingarden
Headwaters Raingarden
Headwaters Raingarden
Headwaters Raingarden
Headwaters Raingarden and daylighted creek
