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September 12, 2011
DESIGN
ECOLOGY A 21st Century Strategy
• Straight Lines to Low Point Results in Flooding & Low Summer Stream Flows
• Impacts to Habitat – poor water quality
– loss of cover & biodiversity
– low, warm stream flows, no O2
• Impacts to Infrastructure – increased flooding with urbanization
– combined sewer overflows
– exceeded treatment capacity
Existing Infrastructure
Impervious Surfaces
THE RESULTS HAVE NOT BEEN GOOD
LOST BIODIVERSITY
LOW STREAM FLOWS
INCREASED HEAT
MORE FLOODING
ENERGY IMPACTS
WATER QUALITY
UNSAFE
UNSANITARY
Infrastructure Failures
Integrated Systems
Bioswales
Flow-Through
Planters
Living Roofs residential
Living Roofs education: College of Marin, Nueva School
civic: California Academy of Sciences
Living Roofs
CAS
Living Walls
• Water filtration
• Storm-water conveyance
• Storm-water detention
• Reduction of cooling
demand
• Habitat for birds and
butterflies
• Air quality
• Aesthetic benefit
• Mitigate “Urban Heat Island”
interiors
Living Walls
Living Walls civic: California Academy of Sciences
Living Walls Commercial office building: 110 embarcadero, san francisco
Greywater
BERKELEY ECOHOUSE
BERKELEY ECOHOUSE
Greywater
Greywater
Functional civic art in Seattle
Rainwater Harvesting
ROOF CATCHMENT CALCULATIONS
(CA) x (R) x (E) x (7.48 gal/cu. ft.) = GALLONS
CA = CATCHMENT AREA (SQ. FT.)
R = RAINFALL (FEET)
E = EFFICIENCY 0.9 = STD ROOF
0.8 = GRAVEL ROOF
0.3 = GREEN ROOF
EASY METHOD (standard roof only):
each 1,000 SF of catchment area
1” of rainfall = 600 gallons
Infiltration Swales
Natural Swimming Pools • Natural Swimming Environment uses gravel, plants
and light to keep pool clean
• Chlorine-Free Water is healthy, clean and safe
• Provides Wetland Habitat
• Beautiful Landscape Element
Natural
Swimming
Pools
Stormwater Mgt
• Protect water quality
• Reduce impacts to
infrastructure
• Reduce irrigation demand
• Infiltration / recharge
• Biofiltration
SEA Streets Seattle
95% Runoff infiltrated to groundwater from 1.1 acre sub-basin
Stormwater Mgt
Low Impact Development (LID)
Low Impact Development Center
http://www.lowimpactdevelopment.org/
EPA SWPPP Templates
http://cfpub.epa.gov/npdes/stormwater/swppp.cfm#template
EPA LID
http://www.epa.gov/owow/nps/lid/
Roof Catchment Calculator
http://www.bushmantanks.com/WhyWaterTanks/Water%20Catchment.aspx
California Graywater Standards, Title 24, Part 5, California Administrative Code,
Graywater Systems For Single Family Dwellings
http://www.owue.water.ca.gov/docs/Revised_Graywater_Standards.pdf
Graywater Guide http://www.owue.water.ca.gov/docs/graywater_guide_book.pdf
Oasis Designs
http://www.oasisdesign.net/greywater/index.htm
The Irrigation Association, irrigation information
http://www.irrigation.org
Green Affordable Housing Coalition
www.greenaffordablehousing.org