Stormwater GreenHomeNYC August 2008
-
Upload
greenhomenyc -
Category
Technology
-
view
549 -
download
3
description
Transcript of Stormwater GreenHomeNYC August 2008
![Page 1: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/1.jpg)
Water
August 20 Forum
Häfele Showroom
![Page 2: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/2.jpg)
S.W.I.M.
• Clean Water Act = Fishable and Swimmable
• Storm Water Infrastructure Matters
• Over 45 members, including Gowanus Dredgers, Nos Quedamos, Cook + Fox, NRDC, Sustainable South Bronx
• www.swimmablenyc.info
![Page 3: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/3.jpg)
PROBLEM
• CSO = combined sewer overflow
• More than 27 billion gallons of untreated stormwater and raw sewage per year
• 460 CSOs in NYC
![Page 4: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/4.jpg)
![Page 5: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/5.jpg)
SOLUTION• Green infrastructure, Low
Impact Development (LID), Best Management Practice (BMP), Source Control
• Interagency BMP Task Force
• Citizen Implementation
![Page 6: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/6.jpg)
Natural Resources Defense Council
• Larry Levine, Project Attorney• a S.W.I.M. member organization• Local Law 5 – requires a “Sustainable
Stormwater Management Plan” for NYC– 1/30/08: Intro 630-A approved unanimously – 2/19/08: Bloomberg signs into law– 10/1/08: First draft due, for public review &
comment– 12/1/08: Final Plan DUE
![Page 7: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/7.jpg)
Local Law 5
• Mayor’s Office of Long Term Planning and Sustainability has lead responsibility; quarterly public meetings to solicit input – next meeting anticipated in Oct.
• Key Plan Elements:– focus on “green infrastructure”– code revisions for new development and redevelopment– financial and other incentives for retrofitting– design specs for public projects– long-term and interim goals and milestones– public notification of CSO events
• Complete progress report due every 2 years
![Page 8: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/8.jpg)
Local Law 5
Example BMPs:• Rain gardens• Downspout disconnection• Green roofs• Enhanced street tree pits and planting strips• Rain barrels • Pervious pavement• Rainwater harvesting• Water conservation; greywater re-use• Stormwater Utility Fee (separated from water rates)
![Page 9: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/9.jpg)
Sustainable South Bronx
• Rob Craudereuff
• Green Roof Tax Abatement
• Passed NYS in June 2008
![Page 10: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/10.jpg)
Rob CrauderueffSUSTAINABLE SOUTH BRONX
![Page 11: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/11.jpg)
![Page 12: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/12.jpg)
![Page 13: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/13.jpg)
![Page 14: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/14.jpg)
USA USA= 5% 25%
World’sPopulation ?
![Page 15: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/15.jpg)
USA USA= 5% 25%
World’sPopulation
World’sIncarcerated
![Page 16: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/16.jpg)
•Unemployment: 25%•Living in POVERTY: 40%
•Median Household Income: $20K
•Problems to be addressed:
![Page 17: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/17.jpg)
![Page 18: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/18.jpg)
![Page 19: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/19.jpg)
![Page 20: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/20.jpg)
![Page 21: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/21.jpg)
Bronx Ecological Stewardship Training
![Page 22: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/22.jpg)
![Page 23: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/23.jpg)
![Page 24: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/24.jpg)
![Page 25: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/25.jpg)
Source: Columbia University Urban Planning Studio, 2006 Instructors: J. Rosenthal & K. Bakewell
![Page 26: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/26.jpg)
![Page 27: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/27.jpg)
Green Roof Tax Abatement
• $4.50/s.f. up to $100,000
• 3 year maintenance plan
• Agreement for City to inspect
• Applications:1/1/09? - 3/15/13
![Page 28: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/28.jpg)
Green Roof Tax Abatement
• At least 50% of the roof, green roof defined as:– Roof Membrane– Root Barrier– Insulation– Drainage– Growth Medium (3 inches or irrigation or certified)
– Vegetation (80% covered)
![Page 29: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/29.jpg)
EDAW
• Timothy Terway
• Urban Design Meets Urban Ecology
• Interdisciplinary Practice: Different Disciplines engaged in Studying Systems
![Page 30: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/30.jpg)
How do we make this…. function like this?
![Page 31: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/31.jpg)
Green Stormwater Infrastructure: What is it?
• Integrated, landscape-based approach to sustainable development
• Set of strategies to maintain existing natural systems, hydrology, ecology
• Flexible approach based on a toolkit of simple techniques
![Page 32: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/32.jpg)
Stormwater Goals
• Water quality improvement– Filter pollutants and
contaminants• Water conservation• Peak flow control • Volume reduction
Complimentary Goals
• Wildlife habitat• Greening cities,
aesthetics• Recreation and open
space• Environmental education
& stewardship• Shading / heat island
reduction
![Page 33: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/33.jpg)
The NEW Paradigms – Urban Water Cycle
![Page 34: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/34.jpg)
Landscape Transition
SFPUC 2007
![Page 35: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/35.jpg)
What is your primary goal?
– Water quality– Aquifer recharge– Combined Sewer Overflow (CSO) reduction– Green streets– Flood reduction
![Page 36: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/36.jpg)
Toolkit
• Green Roofs• Cisterns• Downspout Disconnection• Rain Gardens• Bio-Retention• Detention Basins• Constructed Wetlands• Permeable Paving• Stream Daylighting• Urban Forest
![Page 37: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/37.jpg)
Case Studies:
• Jordan Cove, CT
• 100 acre Urban Regeneration Masterplan (New York Metro)
![Page 38: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/38.jpg)
Stormwater Research: Jordan Cove
• Was Designed to Determine Water Quantity/Quality Benefits of BMP’s
• Monitoring took place over 10 years
![Page 39: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/39.jpg)
• More info: www.jordancove.uconn.edu
![Page 40: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/40.jpg)
FindingsActivity Traditional ($) BMP ($)
Cul-de-sac bioretention1,275 2,183
Driveway (asphalt)/lot 2,800 --
Driveway (paver)/lot -- 7,896
Erosion & sediment control/lot
322 625
Plantings 500 650
Planning and design/lot 401 808
Road and curb 23,494 102,500
Rain gardens/lot 0 575
Stormwater collection 7,770 3,600
36,562 118,837
1. To implement BMPs on 100% of the lots in the BMP portion of the subdivision - goal met.
2. To maintain post-development peak runoff rate and volume at levels equal to predevelopment rates. – volume and peak rate goal met
3. To maintain post-development loading of TSS at levels equal to predevelopment rates – goal not met.
4. To retain sediment onsite during construction. – goal not met.
5. To reduce nitrogen export by 65% - goal met.
6. To reduce bacterial export by 85%. – goal not met.
7. To reduce phosphorus export by 40%. – goal met.
![Page 41: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/41.jpg)
EDAW
![Page 42: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/42.jpg)
Can you infiltrate on site?
• Soils• Depth to groundwater• Liquefaction dangers• Underground utilities• Slope• Contamination
![Page 43: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/43.jpg)
Tools that require infiltration:– Rain gardens– Pervious Pavement
Tools that do not require infiltration:– Cisterns– Eco-roofs (or roof
gardens)– Bioretention planters– Urban forest– Stormwater wetland– Detention basin
Using the Toolkit
![Page 44: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/44.jpg)
Gauging Impact of Tools
![Page 45: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/45.jpg)
Functions of ToolsRunoff Minimization
Rainwater Capture
Landscaping Infiltration Conveyance WQ Treatment
Permeable Pavement O x x
Bioretention x x O x O
Bioswales x x O O
Stormwater Planters
x x O x x
Green Roofs
O x x
Wetlands O x O
Turf Replacement x x O x x
Infiltration Devices
x O x
Source: Dan Medina, CH2MHillO Main function
x Secondary Function
![Page 46: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/46.jpg)
• Sizing: 4% of catchment• Vegetation: Native vegetation, drought tolerant,
medium to tall stem height• Filter Media: Sandy Loam, < 5% fines (clays)• Pretreatment: Always incorporate pretreatment
separated from system till catchment built out and veg. established
Inundation tolerance
2/3 Veg Height
80%ile compliance in summer months
General Rule of Thumbs
![Page 47: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/47.jpg)
BMP Sizing Factor Summary
IMP Sizing Factors
Flow-Through Planter
Group D: 0.05
Vegetated/Grassy Swale
Group A: 0.10 to 0.14
Group D: 0.07 to 0.115
Bioretention Basin
Group A: 0.13Group D: 0.06
Under-Drain or Infiltration:
• Source: NRCS
Group A – low runoff potential (<10% clay)Group D – high runoff potential (>40% clay)
![Page 48: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/48.jpg)
![Page 49: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/49.jpg)
![Page 50: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/50.jpg)
![Page 51: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/51.jpg)
![Page 52: Stormwater GreenHomeNYC August 2008](https://reader035.fdocuments.us/reader035/viewer/2022081602/5554f1b9b4c905bb2a8b4e82/html5/thumbnails/52.jpg)
Next Month’s Forum:
International Green Building Showcase
September 17
Location TBA