Strategies that could have prevented Sainte-Marie’s houses from being dislodged by 2019 flood not found in codes or bylaws despite likelihood of an increase in probability of extreme events on the Chaudière River in coming years
As the Chaudière River receded from the downtown area of Sainte-Marie, Quebec, in 2019, it left the usual devastation after a flood – mud-smeared streets, basements drenched in dirty water, a park where the retreating current had left tires, garbage bins and other detritus.
in a 2020 report that “it’s likely we’ll see an increase in the probability of extreme hydrological events on the Chaudière River over the next few years.”of the country’s national and provincial building codes shows that they are bereft of requirements to deal with the increasingly harsh weather disruptions associated with climate change, including flood threats.
He explained how the waterproofing actually made things worse because, since it didn’t let water into those houses, they became like boats, lifting off their foundations. “The higher the water rises, the more Archimedes’s principle applies. The higher the water, the harder it pushes on the building.”
That damage occurs because, when there is heavy rainfall, sewers can become overwhelmed and will back up drainage pipes, flowing instead into basements.can prevent that from occurring, thanks to a flap that blocks water from flowing up the drain. Though it costs thousands of dollars to dig up a basement to insert this device in existing homes, it is much less expensive to add it when building a new house.
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