Breached levees are a major concern for riverside cities; New Orleans struggled with their disastrous results after Hurricane Katrina. While shoring and sandbagging have been relied upon in the past, new methods for stopping breaches are emerging.
The Economist reports on some of these new technologies and techniques, including some that use the power of water itself to prevent levee breaches.
"The largest of the new devices is designed to block deep breaches. The Portable Lightweight Ubiquitous Gasket (PLUG) is a sausage-shaped balloon made of polyester and PVC, and fitted with motorised pumps. When dropped into a river (usually by helicopter), PLUG's pumps switch on automatically and begin forcing water into the balloon through a valve. The air thus displaced is expelled through a second valve until the device is 80% full, at which point the pumps shut themselves down."
Read the full story: Dambusterbusters
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City of Rosemead
Rutgers University, Edward J. Bloustein School of Planning and Public Policy
One Hundred Miles
University of Michigan School for Environment and Sustainability (SEAS)
Hunter College, City University of New York (CUNY)
The Architects Foundation
City of Cambridge
The Pocatello Development Authority
The Urban Renewal Agency of the City of Pocatello