mohammad hosein pour hasan zadeh; Ghader Ahmadi
Abstract
Earthquake has historically been considered as a cause for vast destruction of buildings, casualties, and financial damages in Iranian cities. To prevent such a disaster it is necessary to construct resistant buildings and retrofitting the existing ones. The main aim of the present study was analyzing ...
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Earthquake has historically been considered as a cause for vast destruction of buildings, casualties, and financial damages in Iranian cities. To prevent such a disaster it is necessary to construct resistant buildings and retrofitting the existing ones. The main aim of the present study was analyzing the vulnerability of houses in Urmia against the earthquake and ranking the districts of the city using TOPSIS method. The applied method was descriptive-analytical and the type of research was applicable with a quantitative-qualitative approach. Documentary and field methods were applied to collect the required data. Based on TOPSIS method, the findings of the present study indicated that the average rate of vulnerability of houses for the whole city of Urmia was 0.485. The highest rate was belonged to district 4 with a TOPSIS score of 0.818 and the lowest one to district 1 with a score of 0.296. The score of district 5 was 0.338 which is considered as a moderated range of vulnerability against the earthquake.
hamid Jalalian; Parviz Zeaiean; Parastoo Darouei; Khadije Karimi
Volume 2, Issue 4 , December 2015, , Pages 73-98
Abstract
Rapid expansion of cities and their uneven physical growth, which calls “urban sprawl”, has some consequences such as; vanishing the villages and their surrounding farm lands, converting agricultural lands into other land uses, and destructing the ecological resources. Such a situation is ...
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Rapid expansion of cities and their uneven physical growth, which calls “urban sprawl”, has some consequences such as; vanishing the villages and their surrounding farm lands, converting agricultural lands into other land uses, and destructing the ecological resources. Such a situation is more serious in regional metropolises. Isfahan and Urmia are two important regional metropolises with different environmental and economic structures. Both cities have experienced a rapid expansion during the recent years. The present paper has adopted a descriptive-analytical approach to study the physical expansion of the mentioned cities and their impacts on the surrounding areas. Required data were collected using documentary method, and required remote sensing data were obtained from Landsat7 images in 2001 and Landsat8 images in 2013. Comparing different periodic images of two cities and analyzing obtained data from Statistical Center of Iran showed that both Isfahan and Urmia are vastly facing with rapid population growth and alteration of their surrounding’s land uses. Application of the Holdren method for a duration of 1956-2011 showed that physical expansion is more than the real needs of the population in both cities, especially in Urmia. The result of such process is alteration of more and more agricultural lands into other applications. The rate of population growth in Isfahan, during the study span time, was nearly consistent, but in Urmia the trend was different with a high population growth especially at the beginning of 1980s due to Iraq-Iran war. It can be concluded that main reasons for alteration of farm lands around Urmia include: inefficiencies associated with urban detailed plans, low levels of farm land prices against the urban ones, vulnerability of horticultural activities next to the city, and lower rates of financial interests of agricultural activities. But, the main reasons for converting the farm lands into urban construction in Isfahan are: industrialization of the area, constructing residential estates around the city, and expansion of academic and government activities at the surrounding area. The mentioned factors have accelerated migration of different groups of people from nearby villages and towns towards Isfahan. Therefore, population growth and need for urban constructions have been leading to change the agricultural land uses and finally more vulnerability and inconsistence of environmental resources.
