Much of the nation’s stormwater infrastructure, designed decades to a century ago to prevent floods, can exacerbate flooding during the severe weather events that are increasing around the globe, new research led by U-M CEE demonstrates.
The problem lies in traditional planning’s failure to recognize flood connectivity: how surface runoff from driveways, lawns and streets—and the flows in river channels and pipes—are all interlinked. The result is interactions, often unanticipated, between different stormwater systems that can make flooding worse.
“When we design, we typically focus on localized solutions,” said Valeriy Ivanov, U-M professor of civil and environmental engineering and co-first author of the study published in Nature Cities. “We have an area of concern, sometimes it’s a single plot of land, or a set of parcels that need to be connected by stormwater infrastructure, and we design specifically for those areas.
“But those areas are impacted by flooding that occurs around them, and that means designed stormwater infrastructure may have unintended consequences.”
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2moGreat post Michels Corporation I was reading a paper just last week stating over a million miles of disused pipelines are crisscrossing North America. How many could be put to good use if repurposed?