Flood Hazards & Infrastructure Risk in the Lower Mainland Towards a Regional Strategy for Risk Reduction

Transcription

1 Flood Hazards & Infrastructure Risk in the Lower Mainland Towards a Regional Strategy for Risk Reduction Fraser Basin Council Infrastructure Sector Workshop November 5, 2018

2 Lower Mainland Flood Management Strategy Workshop Agenda Objective 1: Brief Stakeholders on the Lower Mainland Flood Strategy - Process and Actions to Date 1. Flood Strategy Overall Context Steve LItke 2. Flood Hazard and Vulnerability Charlene Menezes 3. Flood Risk Management Jessica Shoubridge Flood Risk Management/ Adaptation Examples 1. City of Surrey: Matt Osler 2. Port of Vancouver: Sean Smith Objective 2: Input on the Strategy Small Groups Round 1 Objective 3: Risk Assessment, Other Analyses, and Data Sharing Small Groups Round 2 Plenary Discussion and Wrap-Up Lunch

3 Lower Mainland Flood Management Strategy OVERALL CONTEXT

4 1. Introduction to the Fraser River and Fraser Basin Council

5 BC s Lower Mainland Squamish Fraser River freshet (spring flood) Hope Richmond Coastal storm surge (winter flood) White Rock White Rock

6 3. Lower Mainland Flood Management Strategy Who, What, Where, When, Why & How?

7 Lower Mainland Flood Management Strategy Why & Where? Aims to reduce flood vulnerability from: Fraser River freshet (spring flood) Coastal storm surge (winter flood Including consideration of climate change and increase resilience for communities along the Lower Fraser River and south coast: Hope to Richmond Squamish to White Rock

8 Lower Mainland Flood Management Strategy Who? Fraser Basin Council Facilitator, coordinator, administrator Partners all orders of government, the private sector and civil society (50+) Funding, data, advice and expertise Other key work in parallel

9 Who is collaborating? Government of Canada Province of BC Min. of Public Safety & Solicitor General (Emergency Management BC) Min. of Forests, Lands, Natural Resources & Rural Development Min. of Transportation and Infrastructure Min. of Environment and Climate Change Strategy Other Regional Interests Greater Vancouver Gateway Council BC Wharf Operators Association Canadian National Railway Canadian Pacific Railway Insurance Bureau of Canada Pacific Institute of Climate Solutions Port of Vancouver Simon Fraser University (ACT) TransLink Trans Mountain Vancouver International Airport Authority Fraser Health BC Agriculture Council UBC

10 Who is collaborating? City of Abbotsford Village of Belcarra City of Burnaby Bowen Island Municipality City of Chilliwack City of Coquitlam Corporation of Delta Fraser Valley Regional District District of Hope District of Kent Township of Langley Village of Lions Bay District of Maple Ridge District of Mission City of New Westminster City of North Vancouver District of North Vancouver City of Pitt Meadows City of Port Coquitlam City of Port Moody City of Richmond District of Squamish City of Surrey City of Vancouver Metro Vancouver District of West Vancouver City of White Rock

11 Why a Regional, Collaborative Approach? Regional consensus = compelling case for action Enhanced communications and consensus building Sharing information and lessons learned among peers Implementing projects of regional benefit Recognizing regional inter-dependencies Strategically filling knowledge gaps Leveraging a cost-shared approach

12 Regional Assessment of Flood Vulnerabilities Inter-dependencies Infrastructure damage and disruption (e.g. hydro) impacts other infrastructure, services, people and businesses (supply chains, cargo shipping, etc.) Regional significance infrastructure vulnerability makes flood risk a regional issue Everyone in the region will likely be impacted one way or another from a large flood

13 Phase 1 of the Strategy ( ) What? Building a better understanding: Flood hazards Flood vulnerabilities Flood protection infrastructure, policies and practices

14 Phase 2 of the Strategy ( ) What? Developing a regional action plan: National, provincial, regional, local priorities Recommended management options for diverse local circumstances Recommendations for secure, sustainable funding Through technical analysis in parallel with engagement, dialogue, consultation, and consensus building Ø Phase 3 Implementation

15 Phase 2 Key Components and Activities Underway First Nations Engagement and Participation Vision Floodplain Modelling and Mapping Environment Seismic Resiliency Regional Priorities Flood Mitigation Options Funding and Decision-Making

16 Lower Mainland Flood Management Strategy FLOOD HAZARD & VULNERABILITY

17 Flood Hazard Scenarios 17

18 18

19 Flood Hazard Scenarios - Flood Depth Mapping

20 Regional Assessment of Flood Vulnerabilities Critical facilities located within flood extents include: Fire, police and EOCs Hydroelectric Substations Airport & port facilities Hospitals Schools

21 Regional Assessment of Flood Vulnerabilities Total Economic Loss Projections Flood Scenario A Coastal (Present Day) B Coastal (Year 2100) C River (Present Day) D River (Year 2100) Residential Commercial Industrial Interrupted Cargo Shipments Infrastructure Agriculture Total $5.6 B $6.3 B $1.6 B $3.6 B $1.4 B $100 M $19.3 B $7.1 B $8.6 B $2.6 B $3.6 B $1.8 B $200 M $24.7 B $2.6 B $3.8 B $1.6 B $7.7 B $4.6 B $1.6 B $22.9 B $6.6 B $7.6 B $2.9 B $7.7 B $5.0 B $1.6 B $32.7 B

22 Regional Assessment of Flood Vulnerabilities Estimated infrastructure losses A Coastal (Present Day) B Coastal (Year 2100) C River (Present Day) D River (Year 2100) Hydro Substations $209 M $407 M $253 M $330 M Highways, Public Transit Railways, Airports, Marine Facilities $709 M $764 M $681 M $791 M $158 M $203 M $200 M $216 M Wastewater Plants $66 M $110 M $176 M $198 M Other Critical Facilities $284 M $325 M $393 M $435 M Dikes $34 M $34 M $36 M $36 M Bridges $0 $0 $3 B $3 B Total $1.4 B $1.8 B $4.6 B $5.0 B

23 Regional Assessment of Flood Vulnerabilities Inter-dependencies Infrastructure damage and disruption impacts other infrastructure & services Regional significance Infrastructure vulnerability makes flood risk a regional issue

24 Floodplain Modelling and Mapping Project Evaluate effectiveness of management options and cascading impacts Assess water levels under different flood frequencies and dike breach scenarios Assess dike resilience under scenarios and the likely sequence of dike breaches Inform emergency planning, preparedness and response More accurate flood extent and depth estimates Education tool for decisionmakers, stakeholders and the public

25 Project Scope and Timeline Needs assessment and project scoping Procurement Model development Calibration/ validation Base runs Breach runs Options runs Summer 2017 Fall 2017 Winter/Spring 2018 Summer 2018 Fall 2018 Spring 2018

26 NDMP Risk Assessment Application Risk Assessment Application Submitted Oct 2018 Successful Outcome? Spring 2019 start Model outputs ready Engagement

27 Lower Mainland Flood Management Strategy FLOOD RISK MANAGEMENT

28 Lower Mainland Dike Assessment 71% of dikes are vulnerable to failure by overtopping Only 4% of dike segments meet current provincial standards for dike crest height (includes 0.6 m freeboard)

29 Lower Mainland Dike Assessment

30 Other Practices & Policies

31 Exploring Flood Risk Reduction Options Including approaches to strengthen infrastructure resilience: Engineering Zoning Policies Floodproofing Emergency Preparedness Flood Insurance

32 Flood Initiatives in the Region

33 Thank You! For more information:

34 Small Group Discussions Round One From the perspective of your organization, what flood-related risks and impacts are you concerned with (e.g. flood damages, service disruption, indirect economic losses, other)? In what ways could the interests and concerns of the infrastructure sector be integrated into a regional flood strategy to reduce flood risk?

35 Small Group Discussions Round Two What risk assessment has already been undertaken and what tools are already in use? What kinds of analyses would be helpful to your organization that you would be interested in collaborating on (e.g. interdependency analysis, other)?

36 Plenary Discussion and Wrap Up What strikes you about what you heard today? What do you see as important next steps to reduce flood risk either through the development of the Flood Strategy or within your own organization?