WEGENER, M. and GNAD, F. and VANNAHME, M. (1986) The Time Scale of Urban Change, Advances in Urban Systems Modelling(Hutchison, B. and Batty, M. eds.)
Human settlements evolve over a long time span by the cumulative efforts of many generations. The resulting physical structure of cities displays a remarkable stability, changing only in small increments in normal times. However, underneath this major current of urban change there are more rapid fluctuations or cycles affecting the way the physical structure is utilized. Most existing urban models do not pay the requisite attention to the different time scales of urban change. An outline of an urban model being multilevel in its temporal dimension is sketched.