Well, this is certainly ambitious.
A Chinese construction company has proposed assembling a giant floating city that would drift like an iceberg, with the bulk of the superstructure below the waterline. The cleverly-named Floating City would be at least partially self-sustaining, with farms, hatcheries, recycling systems, a central ventilation shaft and a tidal energy plant at the bottom of the structure.
On the water surface, the city would measure about four square miles in diameter. The city is designed to be built gradually, in modular triangular or pentagonal sections that are assembled onshore and snapped together in the water.
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It gets better. The prefabricated blocks can be attached horizontally or stacked then submerged vertically, allowing for hypothetically unlimited expansion. Docks for supply and cruise ships would be sheltered by a kind of artificial harbor. Internal transportation would be handled by way of electric cars, trains and submarines.
More details from the Floating City project page, which you can savor just for the dense and breathless prose:
All living spaces in the floating city have ocean scenery in all directions, with convenient traffic connections within its 150-meter radius, enjoying proximity to local facilities, services, public transport and gardens. A club located at the top of each block and an equipment room and gravity regulation system located at the bottom. Underwater tunnels with walkways and roads permit horizontal communication and access between the islands and buildings that comprise the floating city.
Yes, but talk is famously cheap. Anyone can just propose a floating city, right? Well, the company behind the project - China Communications Construction Company - is currently building the Hong Kong–Zhuhai–Macau Bridge, and they're among the largest infrastructure construction companies on the planet. Initial design work has been farmed out to AT Design Office in London.
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So sure, why not? Of course, if global warming keeps up, we'll all be living in the floating city of New Denver. But this could be a nice run-through option for practice.
Credit: AT Design Office