The federal climate change report notes that if current global carbon emissions continue, Atlantic Canada will experience a 12 per cent increase in annual precipitation over the next century
Roadsides are seen in floodwater on a portion of highway closed along the Saint John River in Jemseg, N.B. on Wednesday, April 24, 2019.With key infrastructure in the Maritimes and Quebec again threatened by surging waterways, flooding experts say it’s past time for fixes that consider worst-case climate change scenarios.
“Go with the conservative prediction of the future. Go with something that is predicting high potential impact,” said the civil engineer, who teaches at Western University in Ontario. Solutions for roads already in place may include building protective berms, diversion channels to take storm waters from highways and holding ponds to keep water in safe locations, he said.There may also be methods to place natural features near roads to absorb water before it spills onto the pavement, and management systems can be put into place to clear debris in culverts and prevent damming.
Quebec is struggling with infrastructure problems of its own, as residents of several small islands in the Montreal area have been cut off from the world after officials were forced to close the only bridges linking them to the mainland. He said that in urban areas especially, planners can turn to technical solutions such as using more permeable paving materials, planting trees and creating large water retention basins to help soak up the water near developed areas.
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