steven roy, leed ap · 2019-06-11 · steven roy, leed ap climate adaptation and green...
TRANSCRIPT
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Steven Roy, LEED APClimate Adaptation and Green InfrastructureWeston & Sampson
Julie EatonLead Resiliency EngineerWeston & Sampson
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Existing and Predicted Climate Change in Massachusetts
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Temperature
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Projected Temperature Increases
Observed Baseline
Projected Change 2050’s
Projected Change End of
Century
MA Average Temp (°F ) 47.6 +2.8 to +6.2 +3.8 to +10.8
Days with Temperatures
Above 90°F 8 +7 to +26 +10 to +62
Days with Temperatures Above 100°F
<1 <1 to +3 <1 to +13
Days with Temperatures
Below 32°F 121 -18 to -44 -23 to -66
(Source: Northeast Climate Adaptation Science Center, 2018)
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Projected: Annual Average Temperature in Massachusetts
(Source: Northeast Climate Adaptation Science Center, 2018)
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Temperatures Predicted to Increase
Winter: 15 to 40%
Summer: 6 to 18%
Projected Extreme Heat in Massachusetts
(Source: Union of Concerned Scientists, 2007)6
(Source: Northeast Climate Adaptation Science Center, 2018)
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Precipitation:More Droughts, More Floods
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Historical Annual Precipitation in Boston
January 1818 to December 2010
The blue line represents a five-year moving average and the red line a least squares regression. (Source: MA Climate Change Adaptation Report, 2011)
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24-hour, 100-year event in MA• 1961: Technical Paper 40 = 6.5 inches• 2015: Atlas 14, Volume 10 = 8.4 inches
24-hour, 20-year event in Fall in US (change in inches)
Change in Precipitation in Massachusetts and US
9Source: The Fourth National Climate Assessment, 2018
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Increases in Extreme Precipitation EventsSou
rce:
The
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Nat
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Projected: Annual Total Precipitation in Massachusetts
(Source: Northeast Climate Adaptation Science Center, 2018)
In 2018 60-65 inches
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Projected: Annual Days with Precipitation > 2” in Massachusetts
(Source: Northeast Climate Adaptation Science Center, 2018)
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Worcester Reservoir During 2016 Drought (Source: The Boston Globe, 2016)
More Extreme Droughts – 2016 as an Example
• Longest duration of drought (48 weeks) since 2000
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Sea Level Rise
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Existing and Projected Sea Level Rise in Boston Harbor
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Measured: 1 ft sea level rise over past century
(Source: Northeast Climate Adaptation Science Center, 2018)
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Boston Sea Level Rise ProjectionsThreatens barrier buildings, infrastructure, beach and dune
systems, and people
Emission Scenario 2030 (ft) 2050 (ft) 2070 (ft) 2100 (ft)
Intermediate 0.7 1.4 2.3 4.0
Intermediate-High 0.8 1.7 2.9 5.0
High 1.2 2.4 4.2 7.6
Extreme 1.4 3.1 5.4 10.2
(Source: Northeast Climate Adaption Science Center)
• Increased coastal flooding• Permanently inundated low-lying coastal areas• Increased shoreline erosion
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The Impetus
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Snowmageddon 2015: Record Breaker
(108.6 inches for 2014-2015 winter)
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Winter 2015: It Wasn’t All Snow
(Source: abcnews.go.com)
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(Source: abcnews.go.com)
Winter 2015: It Wasn’t All Snow
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(Photo: www.economicsofplace.com)
• Boston 2050: 0.65 m (~2 ft) SLR = $463 billion in losses
• Northeast 2100: $6B to $11B in annual property losses
• Bond Ratings: Moody’s, “Credit risks resulting from climate change are embedded in our existing approach to analyzing the key credit factors in our methodologies”
Sources: WWF/ Allianz: Major Tipping Points in the Earth’s Climate System and Consequences forthe Insurance Sector, 2009; Ceres: Insurer Climate Risk Disclosure Survey 2012 Findings and Recommendations, March 2013Moody’s: Evaluating the impact of climate change on US state and local issuers, 2017
More Consequences: Potential Monetary Losses
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RESILIENCE IN BOSTON
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RESILIENT HARBOR VISION
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CONCEPTS FOR FLOOD PROTECTION
Source:Kleinfelder-Stoss-One-WHG
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FLOOD VULNERABILITIES – NOW & FUTURE
36” SLR – 2070s or later
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DISTRICT SCALE STRATEGIES
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MAPPING FLOOD PATHWAYS
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DEVELOPING DESIGN OPTIONS
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EXISTING CONDITIONS
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NEAR TERM ACTION
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LONG TERM ACTION
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NEED FOR GUIDANCE
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GUIDELINES GOALS
Climate Resilient Design Standards and Guidelines Goals:Establish resilience design guidelines for discrete priority projects and for segmental adaptation projects to achieve flood protection by 2070, with the option to add an additional 2 ft. of protection in the future
Translate the Climate Ready Boston concepts into feasible engineering and operational solutions that focus on protecting public right-of-way from flooding due to tidal and storm surge events
Provide a menu of sample flood protection options with engineering design considerations,preliminary cost estimates, as well as operations and maintenance guidance
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VEGETATED BERMS
RAISED ROADWAYS
HARBORWALK FLOOD BARRIER
TEMPORARY FLOOD BARRIERS
SAMPLE FLOOD BARRIERS
Note: All samples assumeda barrier height of 4 ft. for2070 flood protection
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CLIMATE RESILIENT FLOOD BARRIER DESIGN
Design
Cost
► permitting strategy► additional feasibility studies► increase reliability► incremental adaptation and timeline► value creation, social impact, equity, & co-benefitsBarrier SelectionO&M
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DESIGN CONSIDERATIONS
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Flooding during the March 2, 2018 Nor’easter at Langone Park & Puopolo Playground
CLIMATE DESIGN ADJUSTMENTS
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SAMPLE VEGETATED BERM BARRIER
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SAMPLE VEGETATED BERM BARRIER
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SAMPLE HARBORWALK (SEAWALL) BARRIER
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SAMPLE HARBORWALK (SEAWALL) BARRIER
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Option 1
SAMPLE RAISED ROADWAY BARRIER
Consider options to reduce to one-way traffic and add bike lanes, meet Complete Streets Standards
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Option 1
SAMPLE RAISED ROADWAY BARRIER
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SAMPLE RAISED ROADWAY BARRIER
► Sidewalk gutters (debris, stormwater runoff)
► Snow removal problems
► Poor lighting and personal safety
► Accidents more deadly
► Vehicle emission pipes at head level of pedestrians (poor air quality )
► ADA compliance
► Emergency accessibility
► Business and community health
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Option 2
SAMPLE RAISED ROADWAY BARRIER
Consider options to reduce to one-way traffic and add bike lanes, meet Complete Streets Standards
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Option 2
SAMPLE RAISED ROADWAY BARRIER
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DEPLOYABLE FLOOD BARRIER
Design Considerations for the Site
► Barrier extent/connection to site
► Available open space (deployment or storage)
► Accessibility
► Terrain conditions
► Offsite impacts
Design Considerations for the Product
► Physical Characteristics
► Structural Properties
► Operational Requirements
► Industry Warranty, Certification, Testing
OPERATIONAL CAPACITY
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PRIVATE PROPERTY PROTECTION & THE PUBLIC RIGHT OF WAY
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DEPLOYABLE FLOOD BARRIERDEPLOYABLE FLOOD BARRIER
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Elevated roads and pump station
O&M AND COST CONSIDERATIONS
► energy costs for pump stations and system redundancy
► reassigned or new staff (or contractors) to maintain the new pump stations, generators, treatment systems, and utilities associated with stormwater management
► new O&M equipment needed for stormwater management
► operations management support
► staff training
Case Study: Stormwater management for raised roadways in Sunset Harbor, Miami Beach, FL
NOT JUST BARRIER OPERATIONS AND MAINTENANCE CONSIDERATIONS!
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O&M AND COST CONSIDERATIONS
Source: Boston_January 2015_Shutterstock_Svitlana Pimenov
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LANGONE & PUOPOLO PARK
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LANGONE & PUOPOLO PARKFlood protection cross-section – elevated boardwalk
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DEPLOYABLE FLOOD BARRIERCLIMATE RESILIENT FLOOD BARRIER DESIGN
https://www.boston.gov/departments/public-works/climate-resilient-design-standards-and-guidelines
Please visit the Boston Public Works Department Website for more information, including:► general engineering and design considerations
► sample design drawings and specifications
► opinion of probable costs for sample barriers (construction and annual)
► operations and maintenance guidance.
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