عنوان مقاله [English]
Urban sprawl is one of the most important extra challenges of designers and city makers in twentieth first. According to this basis, the purpose of present writing is sprawl model, growth time process and urban sprawl; recognize sort, indexes, conclusion and effective factors in its appearance by using analyzing-descriptive procedure and use of Latin creditable sources. The present research concluded city growth is said to developmental land increasing and its urban sprawl is city growth that has been the collections of negative features. The impediment of city growth appeared into three forms, the growth for development of inner areas or extra inner growth (IN FILL), these cases accounted on catalizer factors in development of urban sprawl expansion growth (EXPANSION), far from center growth or city outlying growth (OUTLYING), population growth, economic growth, industrialize, taxes for domains and building, lack of housing, physical rupture, demand for increasing life spaces, transportation and large lands. Beyond this issue, one of the most important urban sprawl conclusions, we can refer to: ecology destruction, farm destruction, lack of open spaces, traffic jam problems, city deterioration, delete a social concept and lacking historical sites.