عنوان مقاله [English]
Since the industrial revolution, with the increase quality of life in the cities many people migrated from villages to cities. This influx of populations into cities has had a great impact on urban life. One of these scattered effects is horizontal growth accompanied leapfrogged extension of city boundaries caused by citizen's will to leave central urban areas and live in urban countryside. This article analyses urban sprawl phenomenon in Qazvin city districts. For this, literature review is made by categorizing in three classes: "sprawl definition", "causes of sprawl" and "results and manifestations of sprawl". Then, 13 indicators are chosen among others in literature for measuring urban sprawl in Qazvin districts and corresponding data to all of the indicators are gathered from natinal census of 2011 and Geographic Information System (GIS). Then, factor analysis technique is implemented by SPSS software and the indicators are attributed to four factors called density, configuration, land-use and accessibility, the results which are totally consistent with literature. These factors explain the variance of urban sprawl by 27.8, 21.6, 11.3 and 9.5 percent respectively. It is shown that "shape index" and "fractal dimension" as new indicators for measuring urban sprawl are significantly related to this phenomenon. Results also show that districts 4, 5, 7, 11 and 12 are the most sprawled and districts 17, 28, 38 and 39 are the least sprawled districts in Qazvin.