green infrastructure
TRANSCRIPT
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James HouleProgram Manager
UNH Stormwater Center
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Context
• Climate Mitigation is all about carbon (reducing emissions)
• Climate Adaptation is all about water
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General Outline
• Problem: There are changing patterns and there need to be new innovations for municipal infrastructure built with more useful and relevant data.
• Solutions: Widespread application of GI incorporating storage and flexible conveyance in the landscape
• Benefits: improve local community resilience, or the ability of a community to bounce back quickly from climate impacts
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Climate Solutions New England (CSNE), 2014
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Extreme Events Increasing
% increase from 1958‐2012 in the amount of precipitation from extreme rain events (heaviest 1% of all daily events from 1958‐2012
Source: Kenneth Kunkel, Cooperative Institute for Climate and Satelites, Noreth Carolina Sate and NOAA NCDC
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• NOAA Rainfall data last updated in 1963
• Research examining impacts including the last 50 yrs show that 28‐60% increase rainfall depths (Guo 2006)
• infrastructure design today relies on outdated data
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Infrastructure will be increasingly compromised by climate‐related hazards, including sea level rise, coastal flooding, and intense precipitation events.
Source: Antioch University of New England, 2009
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Not if…. When…
Source:Shaleen Jain, UMaine Civil & Environmental Engineering & Climate Change Institute (2012)
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Three things you can do now
1.) Use up‐to‐date design standards2.) Include multiple no‐risk improvements to all designs3.) Identify hotspots and implement preventative GI pilot projects
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Improved Data
TP‐40 (1961)Northeast Regional Climate Center (NRCC, 2010)
Percent Difference
Event in yrs2 3.1 3.3 5%10 4.5 4.9 8%25 5.5 6.2 11%50 6.0 7.4 19%100 6.8 8.8 23%
Inches per 24 hrs
http://precip.eas.cornell.edu/
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up‐to‐date code
http://www.southeastwatershedalliance.org/Final_SWA_SWStandards_Dec_2012.pdf
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2013 Model Regulations$0 Cost Controls
http://www.southeastwatershedalliance.org/Final_SWA_SWStandards_Dec_2012.pdf
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TSS (lbs) TP (lbs) TN (lbs)10‐years 1,471,440 4,470 122,40025‐years 3,678,600 11,175 122,400
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Municipalities are facing decisions about the construction or reconstruction of water resource infrastructure today that will have a profound impact on the size, scope, cost of drainage, and relative risk years into the future.
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Highest priority culvert was replaced with a bridge
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Questions?