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#100 YEAR FLOOD CODE#
#100 YEAR FLOOD PLUS#

The Assiniboine and Red rivers that converge on Winnipeg, Man.

The maps identify the most vulnerable areas in one-square-kilometre grid segments: places where rivers are most likely to overflow their banks, and by how much. In short, the unusual – heavy deluges and unseasonal thaws that overwhelm streets, homes, sewers and dams – will occur not once in a century but regularly, several times in a generation.

And flood depth may increase by up to 60 per cent,” Simonovic said. “The message is very clear: Up to 30 per cent more of Canada may be under water by 2100.

#100 YEAR FLOOD CODE#

Users can search by postal code and zero in on neighbourhoods, or explore specific watersheds to compare current 100-year flood zones to those forecast under worst-, mid- or best-case climate-change scenarios 60 years and 80 years from now. Using this data, Simonovic has superimposed on web-based maps current and future flood frequency, flood depths, flood inundation and flow velocity.

#100 YEAR FLOOD PLUS#

The maps are a visual distillation of almost 150,000 reference documents – including current and historical rainfall and snow-melt run-off data, topographic analyses, hydrodynamic modelling, urbanization and deforestation factors that impede effective drainage, plus a range of climate projections. At the same time, world leaders gather for COP26 climate meetings in Glasgow this week and next. Simonovic said releasing the map tool is part of his personal commitment, and Western’s newest contribution, to mitigating and adapting to the impact of climate change. “And here in Canada, until now, we haven’t had a nation-wide, standardized way of understanding the vulnerabilities of our own landscapes.” A year’s worth of rainfall recently fell, in just three days, in central China.

“Floods are killing people around the world, and in countries you wouldn’t expect, such as Germany, the U.S.

“What we used to call 100-year floods in London, for example, are taking place now once every 30 years,” he said. A Western University flood-control expert has developed the first Canada-wide maps showing how floodplains – including low-lying areas of major cities like Vancouver and Montreal – may become inundated in the next 80 years under various climate change scenarios.Ībout four million Canadians now live in flood-affected areas – and they and others will be at increased risk in coming decades, the mapping data shows.Įngineering professor Slobodan Simonovic’s mapping tool is a deep dive into one consequence of more frequent, and more intense, extreme weather induced by climate change.