TIMELINE:

  • 2014-2016

FOCUS:

  • Building a better understanding of flood hazards

  • Flood vulnerabilities and the state of flood protection infrastructure, policies and practices across the region

DELIVERABLE:

Phase 1 Overview

Phase 1 of the LMFMS (2014-2016) was focused on an analysis of BC Lower Mainland flood scenarios, a regional assessment of flood vulnerabilities and a review of flood protection works and practices in the region.

In Phase 1 (2014-2016) of the LMFMS, three major projects were completed:

  • Project 1: an analysis of Lower Mainland flood scenarios
  • Project 2: a regional assessment of flood vulnerabilities
  • Project 3: a review of the state of flood protection infrastructure, policies and practices.

Two key findings emerged from Phase 1

  1. There is a significant and increasing risk of a large-magnitude flood in the Lower Mainland and
  2. The risk of flood is projected to worsen over the next 85 years, both in terms of flood frequency and size, because of sea level rise and other projected impacts of climate change.

If a major Fraser River or coastal flood were to occur between now and 2100, it would trigger losses estimated at $20 to 30 billion, which would be the largest disaster in Canadian history.

Details on Phase 1 can be found in the Phase 1 Summary Report.

Phase 1 reinforced the critical importance of a regional strategy and a major investment in flood mitigation. The costs of a major flood event far outweigh the costs associated with effective flood mitigation.

Phase 1 Reports

Here are reports and materials from Phase 1 of the Lower Mainland Flood Management Strategy, which completed in May 2016. Phase 1 included an analysis of Lower Mainland flood scenarios, a regional assessment of flood vulnerabilities, and a review of current flood protection works and practices. 

REPORTS 

Phase 1 Summary Report: Lower Mainland Flood Management Strategy initiative (May 2016) 

Report: Simulating the Effects of Sea Level Rise and Climate Change on Fraser River Flood Scenarios 

Report: Analysis of Flood Scenarios 

Report: Regional Assessment of Flood Vulnerability (Final Report with Appendices) (April 2016)

Lower Mainland Dike Assessment

BACKGROUND

Phase 1 Maps

In Phase 1 of the LMFMS, flood maps of the Lower Mainland were developed for River and coastal flood scenarios (present day and 2100), for regional analysis. These maps do not take into account dikes or other flood infrastructure and must be read in conjunction with the Phase 1 Summary report and the full report Regional Assessment of Flood Vulnerability.

For a look at the more recent modelling and mapping work in Phase 2, see Lower Mainland Flood Management Strategy Flood Maps.

COASTAL FLOOD SCENARIOS A & B
OVERVIEW MAP
FRASER RIVER FLOOD SCENARIOS C & D OVERVIEW MAP
SUBREGIONAL MAPS
Sample maps showing flood extents and essential facilities in the floodplain

FAQs

Check out the most Frequently Asked Questions on flood hazards and flood management

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