ABSTRACT
There is ample precedent for realizing the significance of urban group form and social connectivity in the utopian discourse of the First Industrial Revolution. The 19th century witnessed a technological revolution that spawned a new scale of urbanization around industrial technique and production that was unprecedented at the time. A component of the "urban agriculture" impetus today shares something of this sentiment. And more recently in postwar Japan, the "Metabolist" movement raised the importance of "group-form" as an important infrastructural construct in the evolution of the massive new urbanization. New York City's water infrastructure provides a useful lens through which to examine the growing connectedness of urban-infrastructure systems. A common micro-infrastructure intervention for local detention of rainfall is to increase landscape perviousness at the building, block or neighborhood scale. Green roof strategies are attractive for adding perviousness in dense urban environments because rooftops are a high fraction of the impervious land area.
