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TRANSCRIPT
The Role of “Green” and “Grey” Infrastructure in
Crea8ng Resilient Communi8es
Brendan Shane District Department of the
Environment April 30, 2013
CuGng Edge Framework
} 32 Goals and Targets; 143 Ac8ons } Stormwater management impacts cut across the plan’s challenges and solu8ons
4 CHALLENGES 7 SOLUTIONS
• Jobs and the Economy • Health and Wellness • Equity and Diversity • Climate and
Environment
• Built Environment • Energy • Food • Nature • Transportation • Waste • Water
CLIMATE 2032: Cut citywide greenhouse gas emissions by 50%; All new buildings/infrastructure undergo climate change impact analysis
Credit: By bosela, h<p://mrg.bz/DwS0ya
Climate Resilience Planning } Star8ng risk analysis Spring 2013 } Sea level rise } Storm surge } Extreme weather } Urban heat
} 3 phase study focusing on projec8ons, impacts and solu8ons
} Intent to maximize mul8ple benefits from green infrastructure and other solu8ons
WATER 2032: Make the AnacosIa and other waterways fishable and swimmable;
Use 75% of our landscape to filter or capture rainwater for reuse
Credit: Walter Caldwell, DDOE
Highly Urban Landscape
} 43% of the District’s land area is impervious
} A single 1.2 inch storm produces 525 million gallons of stormwater runoff
Acute Stormwater Problems
} Combined sewer overflows } Severe degrada8on of streams } Trash, sediment, oil, and other pollutants
Pursuing a Range of Solu8ons
} Federal mandates (CSO and MS4) } District stormwater regula8ons } Incen8ves } Green roof incen8ves } Riversmart homes and schools } Stormwater fee credits
} District government ac8ons } Green roof installa8on } Tree canopy for streets and public lands
} Zoning code Green Area Ra8o
Stringent New Regula8ons
} Major land-‐disturbing ac8vity } Retain the first 1.2” on site (or combina8on of on-‐site/off-‐site)
} Major substan8al improvement ac8vity } Retain the first 0.8” on site (or combina8on of on-‐site/off-‐site)
} Reten8on achieved with BMPs that infiltrate, evapo-‐transpire, and/or harvest for non-‐potable use
Stringent New Regula8ons
} Regulated development is cri8cal part of the solu8on
} Scale of development makes it biggest driver of retrofits
} Necessary to speed transforma8on of the District’s 43% impervious land cover
Total area retrofi<ed with retenIon via DDOE direct investment annually
Total area subject to regulaIons annually (15 M SF -‐ @ 1% of land)
10 : 1
On-‐site and Off-‐site Op8ons } Choice of 13 BMP categories, can include shared facili8es
} Off-‐site op8on aher achieving 50% reten8on on site, without documenta8on
} Two op8ons for achieving off-‐site reten8on: } In-‐lieu fee payment to DDOE = $3.50/gal/yr } Use of privately tradable Stormwater Reten8on Credits
Green Roofs, Streetscape, Harvest and Reuse
Green Roof Installa8on
0
200000
400000
600000
800000
1000000
1200000
1400000
1600000
2004 2005 2006 2007 2008 2009 2010 2011
Ward 1
Ward 2
Ward 3
Ward 4
Ward 5
Ward 6
Ward 7
Ward 8
District-‐Wide
Square Feet
On the Ground Implementa8on
Capital Riverfont/Ballpark } US DOT Headquarters green roof and LID streetscape
} Private redevelopment including LID streetscape
} Canal Park public/private development pulling SW from streets and surrounding parcels
On the Ground Implementa8on
NOMA } US ATF HQ } Private hotels, office, and mulIfamily green roofs and LID streetscape
} DDOE and DCPS HQ green roofs and LID streetscape
Contact Informa8on
Brendan Shane Chief, Office of Policy and Sustainability, DDOE 202-‐535-‐1907 [email protected]
sustainable.dc.gov [email protected]