Transcript Climate Change and Extreme Weather Adaptation Options for

Climate Change and
Extreme Weather
Adaptation Options for
Transportation Assets in the Bay Area
Stefanie Hom, Metropolitan Transportation Commission | AMPO | October 24, 2014
Background
• Climate change is projected to cause the San Francisco Bay
to rise as much as 24-inches by mid-century and 66-inches by
end of century
• Current project will identify multimodal adaptation options for
vulnerable transportation assets and an implementation
strategy in three focus areas
• Current project leverages other work:
– Adapting to Rising Tides (ART): Transportation Vulnerability and
Risk Assessment Pilot Project
– BART Climate Change Adaptation Assessment Pilot
– Adapting to Rising Tides (ART) project (larger scope)
– Alameda County Flood Control and Water Conservation District
(ACFCWCD) Sea Level Rise Studies
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Project Area
Oakland Bay
Bridge
Touchdown
San Francisco Bay
Area: Alameda
County sub-region
Oakland
Coliseum
Hayward
Hwy 92
Corridor
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Project Objectives
• A refined understanding of
vulnerability and risk for the
core transportation assets
• A refined understanding of
SLR and storm event
exposure
• High-level multi-modal
climate adaptation options
that each agency can pursue
• Five refined adaptation
options
• Establish evaluation process
that could be replicated
elsewhere
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Adaptation Methodology
Define and
Scope Project
Area and Assets
Refine Sea Level
Rise Mapping
Assess
Vulnerabilities
Define
Adaptation
Strategies
Evaluate Effects
of Adaptation
Options
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Bay Bridge Focus Area: 36” SLR
MHHW 36” SLR
(permanent inundation)
OR
24” SLR + 1-yr tide
18” SLR + 2-yr tide
12” SLR + 5-yr tide
6” SLR + 10-yr tide
0” SLR + 50-yr tide
(flooding, temporary
inundation)
Assets:
• I-880
• 7th Street/Bay Street –
Transbay Tube
• Eastshore State
Park/Emeryville Crescent
• EBMUD Facilities
• Electrical Substation
• Port Operations
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Hayward Focus Area: 48” SLR
MHHW 48” SLR
(permanent inundation)
OR
36” SLR + 1-yr tide
30” SLR + 2-yr tide
24” SLR + 5-yr tide
18” SLR + 10-yr tide
12” SLR + 50-yr tide
6” SLR + 100-yr tide
Assets:
• SR 92
• Bay Trail
• Hayward Shoreline
Interpretive Center
• Oliver Salt Ponds
• Eden Landing
Ecological Reserve
• Industrial Land Uses
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Coliseum Focus Area: 48” SLR
MHHW 48” SLR
(permanent inundation)
OR
36” SLR + 1-yr tide
30” SLR + 2-yr tide
24” SLR + 5-yr tide
18” SLR + 10-yr tide
12” SLR + 50-yr tide
6” SLR + 100-yr tide
Assets
• I-880
• Oakland Coliseum
Amtrak Station
• Oakland Coliseum BART
Station
• BART Oakland Airport
Connector
• MLK Regional Shoreline
• San Leandro Channel
• Commercial/Industrial
• San Leandro Street
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• Coliseum Arena Complex
Vulnerability Metrics
Existing
Conditions
• Metrics describe the asset and highlight any current conditions
or stressors that could affect its vulnerability
Information
• Determine if data is lacking, incomplete, poorly coordinated, or
hard to access
Governance
• Identify challenges with management, authority, regulation, or
funding
Functional
Physical
Consequences
• Consider the function of assets and their relationships with
other assets
• Identify conditions or design aspects that make an asset
particular vulnerable
• Help understand the potential consequences of a climate
change impact for society, the economy, and the environment
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Example Adaptation Strategies
Core Transportation Assets
• Drainage System Modifications
• Update Emergency Management Plans
• Relocation/Replacement/Enhancement
• ITS Solutions
Focus Area (transportation and adjacent assets)
• Levees
• Shoreline Protection (berms)
• Natural and Engineered Solutions
Agency Specific (primarily Caltrans and BART)
• Information Databases
• Coordination
• Strategies that can be integrated into normal
maintenance
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Strategy Selection Process
124 Adaptation Strategies
Screening of strategies
17 Adaptation Strategies
PMT – Project
Management Team
TT – Technical Team
CT – Consultant Team
Identified by CT
Refined by TT
Qualitative Assessment
6 Adaptation Strategies
Identified by CT
Refined by TT
PMT decision
5 Final Adaptation Strategies
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Qualitative Assessment of Strategies
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Final Five Adaptation Strategies
1
Breakwater offshore of Radio Beach (Bay
Bridge)
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Artificial Dune / Living Levee north of Bay
Bridge Touchdown (Bay Bridge)
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Damon Slough Living Levee (Coliseum)
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5
San Mateo-Hayward Bridge Drainage Study
(Hayward)
Mainstreaming Climate Change into
Transportation Agencies
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Evaluate Final Five Adaptation Strategies
• Develop conceptual design
sketches
• Determine costs and
benefits of each adaptation
strategy
• Weigh each option against
a no-action scenario
• Identify administrative and
regulatory issues
• Understand trade-offs
Social Equity
Environment
Adaptation
Strategy
Economy
Governance
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Next Steps
Additional
Analyses
Strategy
Refinement
Long Range
Planning
Adapting to
Rising Tides
Funding
Opportunities
Existing
Processes
Focus Groups
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Stefanie Hom
Metropolitan Transportation Commission
[email protected]
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510.817.5756