Abstract
population growth and rapid urbanization growth in recent decades has not only led to unbalanced physical expansion of cities, but also the growth and development of cities is heavily influenced. As cities developed with no plans and urban areas in a short time reached their primary area several times. Sari, like many other cities in the country is not immune from these changes. So that the city population has increased by 16 times over the last fifty years. The increasing population growth, uncontrolled physical expansion has resulted in the city. In order to prevent these inefficiencies of urban problems, the present study was done to determine the factors influencing the process of expanding Sari and to find out proposed solutions to fix and prevent this process. the method used in this study, descriptive–analytical method, to data analysis and heldern and Shannon entropy model is used and the results show that: 82% of the physical growth of the city between 2006-1956 was related to the population growth and the remaining 18 percent, is related to the horizontal growth and city sprawl, the metropolitan area of the city has denser structure and the surrounding areas have a more dispersed structure. Also the effects of synthetic and natural factors restricting Sari physical development has made the city exorbitance horizontal and linear developed. from the findings that could help prevent the horizontal development of the city, it could be said that we can make the city vertically developed rather than horizontal expansion, improvement and renovation of old texture of implementation and more use of the land, filling the empty spaces and etc.
Highlights
Industrial revolution led to rapid growth of cities, so that the world's urban population was about 3% in 1800 reached to 9.68% in 2005
One of the effects of this physical development is associated with expansion margins of cities or regions in countries, beyond the administrative boundaries of cities and towns
This urban development went into the outer areas and caused changes in surrounding land use. (Shie, 1998)
Summary
Industrial revolution led to rapid growth of cities, so that the world's urban population was about 3% in 1800 reached to 9.68% in 2005. The method of city distribution went outside of its normal way and anarchy took place in urban distribution, it can be said that sprawl physical expansion of the cities is to blame for anarchy about the operation principles and the scientific basis of the urban terrain (Ebrahimzadeh Asmyn et al, 2010) Another point that should be noted about the physical development of cities, is that in Iran non practical growth of urbanization has led to under development and this urban population growth creates different problems such as housing issues, housing lacking facilities, unreflective growth of the city, land speculation, lack of infrastructure, lack of appropriate services, physical tissue dehiscence, and marginalization. It should be added that with continuing physical development without programming in town would make this Positioning Villages located in the vicinity of the town; namely Huvla, Zoqalchaal, Polgardan, lower Deza, upper deza, Ahidasht, upper melik, lower Melik, Sharafabad, Qoroq, come into the metropolitan area and the disorder will be more and more
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