Deep Urbanism is a reading of the city that acknowledges the complex ecological and biogeochemical processes taking place above, below and within the urban ground. In the city, nothing can simply be placed on the surface; the composition of the urban ground requires that structures inevitably extend deep into a complex mix of disturbed soil horizons, construction rubble, pipes, subways, utilities. The most innocent-looking walkway may sit on 30-foot piles driven deep into silty soil; small hillocks might be braced with highly engineered geotextiles. A simple meadow may require the complete reconstruction of a “natural” soil profile; a sunken garden may require drainage infrastructure and thousands of pounds of concrete to keep the water table at bay. Much of the action of landscape is deep underground, buried in space or time.
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