Spatial Evaluation of Urban Form with Respect ToConstruction Density in Yazd

Subject Areas : architecture

mohammadmahdi azizi ¹ ( Professor of Urban Planning School, University College of Fine Arts, University of Tehran, Tehran, Iran )
Mojtaba Arasteh ² ( Student of Urban Planning, University College of Fine Arts, University of Tehran, Tehran, Iran )

Received: 2010-11-29 Accepted : 2011-03-30 Published : 2011-08-23

Keywords:

Abstract :

Yazd is one of the most famous cities in Iran, and perhaps in the world, because of its special characteristic in urban design and architecture. Historical district of this city, according to the city's cultural background and based on its climate features, is an example of specific structure and compact form of a city. While the form of development in the past was interactive with the climate and environment conditions, today, the development pattern of Yazd is converted to dispersal mode and unbalanced growth pattern; this pattern have made lots of urban form in different zone of the city. The purpose of this paper is to investigate construction density with respect to population density, distance to central business district, to the sub-centers, population density, land price, urban block area and cost of public transition in Yazd. Multiple regression analysis is used as the research method. Simple sampling method is used To select districts. So, at first, six district selected (Fahadan and Sheikhdad as central districts; Sare’dorah and Maskan’o’shahrsazi as middle districts; Azadshahr and Safa’eeye as outer and developing districts). After selecting the sample districts, the sample size from each settlement had to be identified. Stratified random sampling (Proportional allocation) is used to do this process and totally, 72 sample extract and study for this research. Construction density is seen as a dependent variable (Because the principle is that wherever physical  development has occurred, the construction density increases) and the others as independent variables of the analysis. According to the results of the analysis, construction density of the neighborhoods is a function of distance to central business district, distance to the sub-centers, urban block area and price of land (with negative correlation coefficient) and population density (with positive correlation coefficient). There is no relationship between the construction density and cost of public transition. So, it can be interpreted that construction density increases by reducing the distance to the city center. This fact lonely explains the spread of physical structure in city of Yazd. Also, the negative correlation coefficient between construction density and distance to the sub-centers shows the distributing of compact districts in sprawl urban areas. The positive correlation coefficient between  construction density and population density shows that somewhere population density increases, the construction density increases too. As considering that the average area of city block from the center to the periphery increases in city of Yazd, it can be said that the construction density decreases from center to periphery. The negative correlation coefficient between construction density and land price is one of the Interesting and distinctive results in this study. This finding shows that if the city spreads in periphery lands, the land prices in this area will increased. On the other hand, land demand in the periphery of Yazd is promoting and Residents of the city of Yazd, in contrast with intensive development in the past time, are now more willingness to live in detached houses. It is the sign of the increasing occurrence of urban sprawl in Yazd.

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