green infrastructure in new york city · 1 green infrastructure in new york city stormwater source...
TRANSCRIPT
![Page 1: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/1.jpg)
1
Green Infrastructure in New York CityStormwater Source Control Performance
John McLaughlin, NYCDEPJulie Stein, NYCDEPSandeep Mehrotra, PE, Hazen and SawyerWilliam Leo, PE, HDR-HydroQualMatthew Jones, PE, PhD, Hazen and Sawyer
September 14, 2012
![Page 2: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/2.jpg)
2
Acknowledgements
NYC DEP
Horsley-Witten
GeoSyntec
Brooklyn College
![Page 3: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/3.jpg)
3
NYC Green Infrastructure Plan
Build cost‐effective grey infrastructure
Optimize the existing wastewater system
Institutionalize adaptive management, model impacts, measure CSOs, and monitor water quality
Sustain stakeholder engagement55
Control runoff from 10% of impervious surfaces through green infrastructure and other source controls
54
52
51
53
![Page 4: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/4.jpg)
4
Stormwater Pilot StudyObjectives
Develop stormwater pilot designs
Construct and maintain pilots within NYC
Evaluate pilot performance
![Page 5: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/5.jpg)
5
Stormwater Pilot Highlights
B Public Housing PilotsC Storage Building Blue RoofM Roadway Median BioretentionP Permeable Pavement
![Page 6: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/6.jpg)
6H&
S F
ile: 9
0034
-Pre
sent
atio
n
2011 Precipitation Patterns
0
1
2
3
4
5
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Storm Rainfall D
epth (in)
0
1
2
3
4
5
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
5‐min Peak Ra
infall Intesity
(in/hr)
Percentile
![Page 7: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/7.jpg)
7
Bioretention
![Page 8: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/8.jpg)
8
Bioretention:Example 0.4” Storm
0.0
0.2
0.4
0.6
0.8
1.00.00.20.40.60.81.01.21.4
8/21/11 12:00 8/21/11 16:48 8/21/11 21:36 8/22/11 2:24
Rai
n In
tens
ity
(in/h
r)
Cum
ulat
ive
Rai
n (in
)
0
1
2
3
4
0
10
20
30
40
50
8/21/11 12:00 8/21/11 16:48 8/21/11 21:36 8/22/11 2:24
Surf
ace
Stor
age
(in)
Flow
(gpm
)
Inflow Rate Outflow Rate Surface Storage
![Page 9: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/9.jpg)
9
Bioretention:Example 4.8” Storm
![Page 10: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/10.jpg)
10H&
S F
ile: 9
0034
-Pre
sent
atio
n
Bioretention 1-4: Vol. Retained
Bio 1 - 7:1 Bio 2 - 6:1
Bio 3 - 9:1 Bio 4 - 17:1
![Page 11: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/11.jpg)
11
Bioretention:Preliminary Observations
Bioretention areas retaining much of the water they receive– Most outflow associated with storms >1”
Curb cuts are not 100% effective at runoff captureLeaf and litter pickup part of routine maintenanceCommunity frequently comments on BMPs and are interested in project
![Page 12: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/12.jpg)
12
Subsurface Detention & Infiltration
North Parking Lot
South Parking Lot
![Page 13: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/13.jpg)
13
Stormwater Chambers:Example 4.8” Storm
![Page 14: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/14.jpg)
14H&
S F
ile: 9
0034
-Pre
sent
atio
n
Stormwater Chambers:Inflow and Outflow
![Page 15: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/15.jpg)
15H&
S F
ile: 9
0034
-Pre
sent
atio
n
Stormwater Chambers:Volume Retained
![Page 16: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/16.jpg)
16
Stormwater Chambers:Preliminary Observations
Subsurface systems effective at capturing runoff (no bypass)
Chamber system not generating consistent outflow
Outflow rates have been below design target (0.25 cfs)
No substantial maintenance needs
![Page 17: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/17.jpg)
17
Roadway Median Bioretention
![Page 18: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/18.jpg)
18
Median Bioretention:Example 1.1” Storm
![Page 19: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/19.jpg)
19
Median Bioretention: Vol. Retained
![Page 20: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/20.jpg)
20
N&S Conduit Bioretention:Preliminary Observations
Most storms have been fully retainedApparent infiltration losses along conveyance swales
![Page 21: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/21.jpg)
21
Permeable Pavement
![Page 22: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/22.jpg)
22Porous Asphalt Standard Asphalt FilterPave
Permeable Pavement
![Page 23: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/23.jpg)
23H&
S F
ile: 9
0034
-Pre
sent
atio
n
Permeable Pavement
0%20%40%60%80%
100%
0.0625 0.25 1 4Volu
me
Ret
aine
d
Rainfall Depth (in)
0%20%40%60%80%
100%
0.0625 0.25 1 4
Volu
me
Ret
aine
d
Rainfall Depth (in)
0%20%40%60%80%
100%
0.0625 0.25 1 4
Volu
me
Ret
aine
d
Rainfall Depth (in)
Standard Asphalt
Porous Asphalt Filterpave
![Page 24: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/24.jpg)
24
Permeable Pavement:Preliminary Observations
No measured flow from filterpave and porous asphalt underdrainsOn-site tests suggest porous asphalt may be generating surface runoff
![Page 25: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/25.jpg)
25
Multiple Blue Roof Systems
![Page 26: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/26.jpg)
26
Blue Roofs:Example 1.9” Storm
0.0
0.2
0.4
0.6
0.8
1.00.0
0.4
0.8
1.2
1.6
2.0
10/29/11 0:00 10/29/11 12:00 10/30/11 0:00 10/30/11 12:00 10/31/11 0:00
Rai
n In
tens
ity
(in/h
r)
Cum
ulat
ive
Rai
n (in
)
0
2
4
6
8
10
12
14
10/29/11 0:00 10/29/11 12:00 10/30/11 0:00 10/30/11 12:00 10/31/11 0:00
Flow
(gpm
)
Uncontrolled
![Page 27: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/27.jpg)
27H&
S F
ile: 9
0034
-Pre
sent
atio
n
0
4
8
12
0:00 12:00 0:00 12:00 0:00
Flow
(gpm
)
0
4
8
12
0:00 12:00 0:00 12:00 0:00
Flow
(gpm
)
0
4
8
12
0:00 12:00 0:00 12:00 0:00
Flow
(gpm
)
0
4
8
12
0:00 12:00 0:00 12:00 0:00
Flow
(gpm
)
Control Trays
Blue Roofs:Example 1.9” Storm
Uncontrolled Modified Inlet
Check Dams Trays
![Page 28: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/28.jpg)
28H&
S F
ile: 9
0034
-Pre
sent
atio
n
Blue Roof: Peak Flow Reduction
Uncontrolled
Check Dams Trays
Modified Inlet
![Page 29: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/29.jpg)
29H&
S F
ile: 9
0034
-Pre
sent
atio
n
Uncontrolled
Check Dams Trays
Modified Inlet
Blue Roof: Volume Retained
![Page 30: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/30.jpg)
30
Blue Roof:Preliminary Observations
All roof types (including uncontrolled) providing some level or retention and detention
Trays and check dams appear to be providing more detention than uncontrolled and modified inlet
Modified inlet performance possibly inhibited by lack of available rooftop storage due to 2% roof slope
![Page 31: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/31.jpg)
31
Monitoring Study Summary
Preliminary observations indicate pilots are providing benefits range of benefits
Findings will be validated and expanded upon through further data collection and analysis
Further data analysis and metrics will providing greater insight into CSO planning
Information on maintenance needs and qualitative performance informing future implementation efforts
![Page 32: Green Infrastructure in New York City · 1 Green Infrastructure in New York City Stormwater Source Control Performance John McLaughlin, NYCDEP Julie Stein, NYCDEP Sandeep Mehrotra,](https://reader034.vdocuments.site/reader034/viewer/2022051602/5ae90a5a7f8b9ab24d8b8433/html5/thumbnails/32.jpg)
32
Questions?
www.nyc.gov/html/dep/html/stormwater/index.shtml
Matthew Jones, EI, PhDHazen and Sawyer, [email protected]