From destruction comes rebirth. Chinese architects Xiaomia Xiao, Lixiang Miao, Xinmin Li, and Minzhao Guo dream up a world in which a devastating asteroid has hit, and we use the crater as the site of a thriving city.
The architects are largely interested in how to use the crater space rather than the why of building such a city in the wake of a regional disaster—aside from the symbolism of birthing a new type of habitat that visually "heals" the Earth. They envision their "Crater-Scraper" as a grouping of towers built lower than the surrounding surface, each topped by a opening to let sunlight, rain, and air in. Each individual tower would house some community space—a park, a library, a theater, a stadium, a market, a museum—with residences and commercial spaces around the edges of each cylinder. The solid portions of the roof would be used for vegetable gardening.
The notion of this underground-ish tower living is vaguely reminiscent of, among other things, the underground silos in Hugh Howey's Wool series, except open to the air instead of self-contained. And that brings up some of the challenges of this kind of structure. The architects envision a water collection center on the bottom levels that feeds into a water redistribution (and presumably water treatment) plant. The water redistribution is left fairly vague, but I imagine it would require a sophisticated and powerful system to prevent drainage problems and flooding. I also wonder if they've contemplated including some way to close the openings to protect the towers from inclement weather.
It's also interesting that, while the architects envision this as a revolutionary new type of urban living, their concept art sees a rather conventional, sprawling city spreading out around it.
Crater-Scraper is a Porous Structure to Capture Light and Water [eVolo Magazine via Inhabitat]