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James Houle Program Manager UNH Stormwater Center

Green Infrastructure

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Page 1: Green Infrastructure

James HouleProgram Manager

UNH Stormwater Center

Page 2: Green Infrastructure

Context

• Climate Mitigation is all about carbon (reducing emissions)

• Climate Adaptation is all about water

Page 3: Green Infrastructure

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• infrastructure design today relies on outdated data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?