New! Analysis of Flood Scenarios
Engineering consultants Kerr Wood Leidal (KWL) have analyzed flood scenarios for the Lower Mainland and other flood hazard studies, reports and models available across the region. The KWL report identifies the flood scenarios that will best serve as the foundation for a regional vulnerability assessment, which is a key component of Phase 1 of the Lower Mainland Flood Management Strategy.
Fraser River Flood Scenarios
The report Simulating the Effects of Sea Level Rise and Climate Change on Fraser River Flood Scenarios sets out 140 possible flood scenarios for the Lower Fraser region, including the densely populated areas of Metro Vancouver and Fraser Valley. The scenarios are based on the Province’s recent hydraulic modelling and take into account variations in river flows, sea level rise projections and climate change scenarios for the watershed.
The study shows that floods in the region are projected to become larger and more frequent. By the end of the century, a one in 50-year flood could be similar in magnitude to floods that currently have a return period of one in 200 to 500 years.
The report is from the Ministry of Forests, Lands and Natural Resource Operations. It is part of the Province’s contribution and support for Phase 1 of the Lower Mainland Flood Management Strategy.
Read the report on the Ministry website.
Fraser River Design Flood Level Update
Fraser River Design Flood Level Update explains new design flood levels on the Fraser River from Hope to Mission, based on a new hydraulic model and recent dike surveys for that section of the river. The modelling work, calibrated with data from the 2012 Fraser River freshet, shows that all but one dike would be at high risk of overtopping during a design flood event – that is, a flood equivalent to the largest Fraser River flood on record, in 1894.
Learn more on the Ministry website.
Lower Mainland Flood Management Strategy
Leaders gather for launch of the Lower Mainland Flood Management Strategy in July 2014. Work on Phase 1 will be wrapping up in late 2015, with reporting out in early 2016.
Collaboration for Flood Protection Across the Region
In 2014 a new initiative was begun: to develop a Lower Mainland Flood Management Strategy to better protect communities along the lower Fraser River and coast – from Hope to Richmond and from Squamish to White Rock.
Partners in this inter-jurisdictional initiative have responsibilities or interests that relate to flood management: the Government of Canada, the Province of British Columbia, 26 local governments, and other entities in the region, including those focused on transportation systems, agriculture and business.
In BC the risk of catastrophic loss from flood is greatest in the Lower Mainland because of its large population (over 300,000 people inhabiting the floodplain alone) and critical infrastructure that is of regional, provincial and national significance.
There is growing understanding that federal, provincial, local and First Nations government agencies and other public and private sector organizations must come together to coordinate flood mitigation efforts on a regional basis. The costs of responding to a major flood event far outweigh the costs associated with effective, proactive planning and investments across the region.
The Fraser Basin Council is program manager and facilitator of the process.
About the Strategy
The Flood Management Strategy will identify opportunities to strengthen flood management policies and practices as well as flood protection works across the Lower Mainland. An integrated, collaborative approach to flood protection is critically important, given the flood risks that Lower Mainland communities face and given that a major flood would have serious social, economic and environmental consequences for the entire region.
There are two phases to the strategy development:
For more on the Lower Mainland Flood Management Strategy, see our backgrounder.
Questions? Contact Steve Litke, Senior Program Manager, Watersheds and Water Resources.
Federal and Provincial Governments
Government of Canada
Province of British Columbia
City of Abbotsford
Village of Belcarra
Bowen Island Municipality
City of Burnaby
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
City 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
District of West Vancouver
City of White Rock
BC Agriculture Council
BC Wharf Operators Association
Canadian National Railway
Canadian Pacific Railway
Greater Vancouver Gateway Council
Insurance Bureau of Canada
Pacific Institute for Climate Solutions
Port Metro Vancouver
Simon Fraser University (ACT)
Vancouver International Airport