Esma'il Salehi; Saeed Negahban; Zohreh Ja'farian Dehkordi
Volume 19, Issue 76 , February 2011, , Pages 29-33
Abstract
Cities are open systems that have always been the origin of change and are themselves changing and evolving, and given the growing population of cities in today's world, the physical space of the city has also expanded and occupied the surrounding land. The physical growth of cities has absorbed and ...
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Cities are open systems that have always been the origin of change and are themselves changing and evolving, and given the growing population of cities in today's world, the physical space of the city has also expanded and occupied the surrounding land. The physical growth of cities has absorbed and destroyed high-quality land. Human societies have been established in the early stages of formation with the aim of using high quality soils for agriculture, alongside or among high quality agricultural land. Over time, along with the expansion of the villages and their conversion into cities, and then the development of cities, high-quality agricultural lands have been added to the urban area and agricultural activities are retreating to poor lands. This article tries to understand the environmental impacts of urban development using a method based on secondary sources, and the results show that this issue is taking place continuously in parts of the suburbs of any city with potential of development and expansion. This physical growth of cities causes the destruction of the environmental balance between the city and its surroundings, which not only reduces the quantity and quality of resources and living conditions, but also causes major complications such as air and water pollution, noise pollution, and In general, the destruction of the environment.
Mohammad Reza Rezvani; Mahdieh Ranjbar; Saeed Negahban
Volume 19, Issue 74 , August 2010, , Pages 61-68
Abstract
A general overview of the process of changes in the country's rural population shows that in the year 1956, about 69 percent of the country's population was in rural areas and 31 percent in the cities. This proportion has faced with decreasing share of rural population and increasing share of urban population ...
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A general overview of the process of changes in the country's rural population shows that in the year 1956, about 69 percent of the country's population was in rural areas and 31 percent in the cities. This proportion has faced with decreasing share of rural population and increasing share of urban population during the past years, so that it has reached 38 percent of the rural population and 62 percent of the urban population in the year 1996. This article tries to investigate the trend of changes in the number of population and settlements in Aradan district located in Garmsar city of Semnan province during the years 1966-2006. The research methodology is a descriptive-analytical method based on field and secondary methods. The results show that between 1966-76 popuation has grown in 15% of Aradan villages, 71.91% were faced with population decline and only 1% of villages had constant growth. In the years 1976 to 1986, the percentage of villages with increasing growth rates decreased compared to previous decade, from 26.31% to 20.37%. In contrast, the percentage of villages with negative growth has decreased from 71.91% to 51.84%. The survey on the growth status of Aradan villages between 1986 and 1996 showed that the percentage of villages that have an incremental growth rate in this period decreased from 20.37% in the 1976-1986 to 9.09%. By contrast, the villages with negative growth have increased from 51.84% to 54.43%. In the period 1996-2006, the percentage of positive growth of villages increased from 9.09% to 19.64% and the negative growth rate decreased from 54.43% to 48.2%.
Zahra Hejazi Zadeh; Saeed Negahban
Volume 16, Issue 61 , May 2007, , Pages 47-49
Abstract
In this research, we tried to identify the relationship between population areas of Fars province and climatic conditions of different regions of the province. Therefore, at first, different air masses affecting the climate of the province were identified. These masses include the northern, western, ...
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In this research, we tried to identify the relationship between population areas of Fars province and climatic conditions of different regions of the province. Therefore, at first, different air masses affecting the climate of the province were identified. These masses include the northern, western, southern (masses) and local winds. Then, after identifying the type of climate in different regions and analyzing the population dispersion statistics, the relationship between population dispersion and climate conditions was identified. Finally, it was determined that the central regions of Fars province had greater population densities than other areas of the province due to suitable climatic conditions (rainfall, temperature, etc.).