Researchers in East Boston are testing a floating ball of marsh grass and seaweed as part of a system to reduce coastal flooding. The project is called the 'Emerald Tutu.'
Emerald Tutu project lead Gabriel Cira holds the rope towing an Emerald Tutu module along Chelsea Creek. It's made of wood chips encased in coconut fiber and netting, with marsh grass growing on top and seaweed underneath. And it's heavy; the pod weighs in at about a ton when waterlogged.. It's a system of floating wetlands designed to reduce coastal flooding by knocking down waves. Boston is projected to see increasing flooding in the coming decades because of climate change.
Of course, the actual function of the Tutu is a bit more complicated than the sponge in your kitchen sink. In theory, hundreds of individual pods would be linked together and anchored to the ocean floor. When waves come through, they would hit these clusters first, lose energy, and then come to shore smaller and with less force.
The test unit in Chelsea Creek is the latest iteration of the project, which was originally developed as theat the 2018 MIT Climate Changed ideas competition. The research team was later awarded a National Science Foundation grant. At the Shaw’s Supermarket near Liberty Plaza, John Walkey, director of climate justice and waterfront initiatives at“This happens to be one of the flood pathways that’s been identified by the city of Boston,” he said."The seawater comes right in ... so the ducks and the geese will just sort of float along into the parking lot and just keep floating along into a parking space.
Because of this history, and the severity of the climate problems, there’s extra pressure to make sure the Tutu not only works as intended, but also takes into account the local community. “I was excited to see how that happens,” said Thiruvengadam, “and when you’re there and another pair of hands are needed, you want to help.”
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