City of Vancouver Sea Level Rise Strategy July 9, 2014 Outline - - PowerPoint PPT Presentation

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City of Vancouver Sea Level Rise Strategy July 9, 2014 Outline - - PowerPoint PPT Presentation

Oct 13, 2022 433 likes •847 views

City of Vancouver Sea Level Rise Strategy July 9, 2014 Outline Preparing for Climate Change Impacts to Our Coastline S ea Level Rise S trategy Implications S ummary, Recommendation, and Next S teps Preparing for Climate Change Despite

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City of Vancouver

Sea Level Rise Strategy

July 9, 2014

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Preparing for Climate Change S ea Level Rise S trategy S ummary, Recommendation, and Next S teps

Outline

Impacts to Our Coastline Implications

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Preparing for Climate Change

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Global green house gas emissions keep growing Despite local efforts

Preparing for Climate Change

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Extreme weather events cost Canadian insurers $3.2B in 2013

Preparing for Climate Change

Calgary Flood 2013 As do the impacts of climate change

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Climate change is creating unprecedented impacts globally … UK Floods 2014

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Preparing for Climate Change

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… and locally, as sea level rise causes ocean and river flooding

Preparing for Climate Change

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Kits Pool: King Tide 2012

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As well as increases in heavy rain events and hotter drier summers.

Preparing for Climate Change

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To ensure Vancouver is ready, Council adopted an Adaptation S trategy with 9 Priority Actions and 46 supporting actions

Preparing for Climate Change

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  • 1. Coastal Flood Risk Assessment
  • 2. Amend minimum building elevations
  • 3. Continue sewer separation
  • 4. Citywide S

tormwater Mangement Plan

  • 5. Continue water conservation actions
  • 6. Extreme Heat Planning
  • 7. Complete an Urban Forest S

trategy

  • 8. Incorporate climate change in building code
  • 9. Complete a back-up power plan
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  • 1. Coastal Flood Risk Assessment
  • 2. Amend minimum building elevations
  • 3. Continue sewer separation
  • 4. Citywide S

tormwater Mangement Plan

  • 5. Continue water conservation actions
  • 6. Extreme Heat Planning
  • 7. Complete an Urban Forest S

trategy

  • 8. Incorporate climate change in building code
  • 9. Complete a back-up power plan

Priority Actions are underway, including recommendations to address sea level rise

Preparing for Climate Change

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Impacts to our Coastline

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Impacts to our coastline

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We rely heavily on our coastline For Working

  • ~135 Million Tonnes of cargo a

year

  • 98,800 j obs
  • $9.7 billion in Gross Domestic

Product (GDP)

  • $20.3 billion in economic output
  • $1.3 billion per year in tax

revenues

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Impacts to our coastline

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For Playing

  • 17 ha of natural shoreline habitat
  • Almost 18 km of beaches surround

Vancouver, including ten ocean-side locations and one fresh water lake.

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Impacts to our coastline

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  • 25,000 people living within 300m of

shoreline

  • 16 million sq ft of residential space

For Living

Photo by Kenny Louie: Flickr

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Impacts to our coastline

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For Tourism

  • In 2012, the tourism industry

generated $3.6 billion in revenue

  • Over 666,000 cruise ship

passengers visited contributing $167M to the economy

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Impacts to our coastline

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unlike areas that will also be impacted by more intense storms Our coastal areas will be impacted by ongoing sea level rise,

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Impacts to our coastline

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And with increasing sea level, our risk grows Huge storm, high tide 2020

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Impacts to our coastline

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~ year 2100 And with increasing sea level, our risk grows

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Impacts to our coastline

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~ year 2200 And with increasing sea level, our risk grows

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We’ re not alone, we can learn from others Big U proj ect – Manhattan

  • $383 M proj ect
  • Protection that provides public space
  • Increase flood construction levels

Impacts to our coastline

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City of Vancouver S ea Level Rise S trategy

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S ea Level Rise S trategy Principles

  • Use best science and learn from others
  • Pragmatic balance of cost and risk
  • Be opportunistic and proactive
  • Take a phased approach, distribute cost of

adaptation across time

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S ea Level Rise S trategy

  • 1. City-wide coastal flood response actions
  • 2. Location-based responses
  • 3. Leverage large-site redevelopments
  • 4. Immediate actions in impacted areas

City-wide / Location-based / Large S ite Redevelopment/ Immediate actions

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  • 1. City-wide Coastal Response

City-wide / Location-based / Large S ite Redevelopment / Immediate actions

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City-wide / Location-based / Large S ite Redevelopment / Immediate actions

Flood Construction Levels (FCL) ensure the ground floor

  • f occupied space is protected from flood risks for the

life of new buildings in designated flood plains

  • FCL has been 3.5m since 1972
  • Interim FCL of 4.5m has been in place since Jan. 2012 in

response to Provincial warnings of proj ected sea-level rise

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  • S
  • phisticated modelling of coastal flooding

factors following the Provincial methodology indicated that the FCL should be set at 4.6m Recommend Flood Construction Level be raised to at 4.6 m

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City-wide / Location-based / Large S ite Redevelopment / Immediate actions

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City-wide / Location-based / Large S ite Redevelopment / Immediate actions

Factors that impact coastal flooding include:

  • high tide (increased from historical levels by

1m for proj ected sea level rise locally)

  • large storm surge
  • wind effects
  • wave effects
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City-wide / Location-based / Large S ite Redevelopment / Immediate actions

S tatistical and coastal flood modelling assessed the probability of extremes of these factors occurring simultaneously and the impact they would have on Vancouver’s shoreline.

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The models were used to map coastal flood plains and depth

  • f flooding to the year 2100 and establish the FCL

recommendation.

City-wide / Location-based / Large S ite Redevelopment / Immediate actions

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Raising FCLs provides an immediate level of protection for at- risk areas while location-based responses are developed

City-wide / Location-based / Large S ite Redevelopment / Immediate actions

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  • 2. Location-based Responses

City-wide / Location-based / Large S ite Redevelopment / Immediate actions

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Modelling indicated future flood prone locations include:

False Creek S

  • uthlands

River District Kits Point Port Coal Harbour

City-wide / Location-based / Large S ite Redevelopment / Immediate actions

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Next phase of Coastal Flood planning is to identify and prioritize location- based protection options including:

  • A. Land Use Changes
  • B. Green Infrastructure (non-structural)
  • C. Grey Infrastructure (structural flood protection)

City-wide / Location-based / Large S ite Redevelopment / Immediate actions

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  • A. Land use changes
  • Restrict permitted uses in flood plain
  • Create flood management buffers, including

existing or new parks

  • Regulate building design and equipment placement

to minimize flood damage and disruption

City-wide / Location-based / Large S ite Redevelopment / Immediate actions

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City-wide / Location-based / Large S ite Redevelopment / Immediate actions

  • Creation or restoration of wetlands
  • S

and dune building

  • Beach enhancements to disrupt wave effects
  • Etc.
  • B. Green Infrastructure (non-structural)
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City-wide / Location-based / Large S ite Redevelopment / Immediate actions

  • C. Grey Infrastructure (structural flood protection)
  • Dykes and berms
  • Increased road elevations
  • Flood gates
  • Over time, new buildings developed at higher FCLs can

also form part of a neighbourhood protection plan

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Explore opportunities to leverage large scale developments and infrastructure proj ects to provide flood protection beyond 2100 and/ or for entire areas:

  • Increased FCL (eg. River District)
  • Viaducts removal may create opportunity to build elevated

road surface to act as a berm

  • 3. Leverage Large S

ite Redevelopment

City-wide / Location-based / Large S ite Redevelopment / Immediate actions

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  • 4. Immediate Actions

Pursue infrastructure investments and emergency response plans in areas such as Locarno Beach and Kits Point that are already seeing impacts

City-wide / Location-based / Large S ite Redevelopment / Immediate actions

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S ummary The S ea Level Rise S trategy includes:

  • 1. City-wide coastal flood response actions
  • 2. Location-based response planning
  • 3. Leveraging large-site redevelopments
  • 4. Immediate actions in impacted areas
  • Best science was used to set recommended

flood construction levels

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Recommendation

  • Approve immediate Vancouver Building Bylaw

amendment to increase flood construction levels in designated flood plains and update associated bylaws

Next S teps

  • Identify and prioritize location-based responses
  • Explore large site redevelopments and

infrastructure proj ects for flood protection

  • pportunities
  • Develop protection and response plans for areas

already being impacted