|Ph.D Student||Porat Idan|
|Subject||Spatiotemporal Polycentricity Analysis of Re-urbanization:|
The Case Study of the Built Area in the City
of Tel Aviv
|Department||Department of Architecture and Town Planning||Supervisors||Professor Emeritus Amnon Frenkel|
|Professor Maxim Shoshany|
|Full Thesis text|
Return of population, economic activities and capital to the urban core areas has become prominent processes in modern urbanism. The spatiotemporal patterns of these re-urbanization processes evolve through spontaneous socio-economic processes and individual and corporate behavior led by local and national planning policies. Superimposition of these processes generates complex patterns core-periphery relationships, polycentricity and pseudo-random spread. Understanding this new widespread phenomenon require collection of adequate spatio-temporal data, implementation of new analysis methods, and integration of their results within the current urban evolution theory.
This research presents a study of re-urbanization in Tel Aviv-Yafo which is serving as the focal point of the country's economy and culture. A data base was constructed for studying Tel-Aviv's re-urbanization processes, representing 30 years of Construction Initiations data (floor area additions) for the city's 30 sub-quarters in two land-use categories: residential and non-residential. Two methods of autocorrelation analysis were implemented on this unique data set: Moran's I analysis; and a new Autocorrelation of Pearson (AOP) technique measuring the spatial synchronization of Pearson's correlation between time series. The spatio-temporal results of the two methods were corresponding with changes in population migration and in development rights determined by the city's planning policy.
Implementation of both techniques resulted a most prominent and unexpected indication to a random pattern of CI development across the city for the residential and non-residential land-uses. Assessment of the pattern of development synchronization indicated a most prominent formation of a strip between Jafa and Azriely which includes the old and new CBD areas of the City. This strip which coincides with area of significant social gradient attracted both residential and non-residential development.
The co-existence of synchronization with spontaneous spread and the emergence of similar density pattern for accumulated CI, unutilized development rights, and population may lead on one hand to a conclusion that complex processes take place while on the other hand it was found that the pattern of accumulated built-up area did not change dramatically over the years. Interestingly, there is no indication for the affinity of this pattern of accumulated build-up to the yearly patterns of CI evolution. Thus, a new hypothesis of Complex Self-organized Convergence emerges, requiring further deeper research of the processes taking place. Planning policies must be aware of these processes and take an active role in leading them in the right direction: urban sustainability.