Even the most conservative flood maps show Richmond, Delta and parts of rural Abbotsford and Coquitlam permanently underwater by Instead, he argues, we are eventually going to be forced to spend billions of dollars on a massive system of flood defences. There are all sorts of reasons why that surface would be protected. A gradual sea level rise of 3. The crisis would build slowly but express itself in a violent storm, driving the now-raised water levels.
There are some scientists that think that as oceans warm we could experience unprecedented storms — frequent severe storms.
The alternative is to abandon it. And where are they going to go? In the 17th century, Acadian settlers in the Maritimes built aboiteaux , earth dams designed to keep the tides out of marshland and turn it into productive farms. By the end of the century, however, the highway, the marsh and much of the town of Sackville may be permanently underwater. Humans may not have taken the land from the sea, in the long run; rather, we borrowed it for a while.
It also includes rail, it includes tractor-trailer traffic and just people commuting between Nova Scotia and New Brunswick, and PEI too, because that corridor is all kind of interconnected.
Possible solutions include raising the dykes, moving the highway and rail line to a much higher and more massive causeway, or moving the land transport links between Nova Scotia and New Brunswick well to the north, to higher ground. The problem comes when you have combinations of events — when you have a typical average high level and then you get stuff piled on top of it.
Likewise, flooding in Annapolis, Maryland, home to the U. Naval Academy, is not expected to reach the 10 percent threshold, although key parts of the city, including the academy campus and downtown, now flood 40 times a year. Our coasts face a certain amount of transformation with sea-level rise and a huge share of our population lives, and GDP is generated, on the coasts.
And as tens of communities turn into hundreds of communities, we are going to have to marshal federal resources to enable this change to unfold in a manageable way. Chronic flooding can be avoided only by adaptation measures—seawalls, levees, and other barriers—or by moving away. Spanger-Siegfried says she understands the dilemma.
But her team decided to include a discussion of options in the study after a climate change expert who works with communities advised them to. All rights reserved. Aerial view of sea side Miami. That number is expected to roughly double to more than communities in less than 20 years. When does flooding become intolerable?
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