Urban metabolism of Brussels

Source: Duvigneaud and Denaeyer-De Smet 1977. The urban metabolism of Brussels, Belgium in the early 1970s.

This fantastic diagram combines many sorts of representation into an early example of a urban metabolism analysis.  It is one of the earliest and most comprehensive studies by the ecologists Duvigneaud and Denaeyer-De Smet (1977).  It includes quantification of urban biomass and even organic discharges from cats and dogs.  While not strictly a MFA, it does incorporate Sankey-style flows and does consider flows and stocks in the system.