The trend of Urban Hierarchy Development in Khuzestan Province: a five decades analysis (1956-2006)

In recent decades, more and more cities have expanded rapidly and have raised as an undeniable fact. The national and regional metropolises, with its focus on facilities and infrastructure, the main hub of the population have become attractive. Negligence of the urban system and the urban sprawl growth uncontrollable urbanization and fragmentation causes an imbalance in the country's urban system. The growing trend of urbanization includes migration, rural - urban and economic development - social causes and uneven pattern of urban networks.This leads to the creation of the first urban phenomenon and is an imbalance in the urban space. The purpose of this study was to analyze the urban system by using the first city in Khuzestan province, rank - size, the class difference, the entropy coefficient and Lorenz curve. The method used in this research is a quantitative – analytic method. The results indicate an imbalance in the regression slope in the hierarchy of a city in Khuzestan province. This imbalance between the ages of 65 and 85 and 75 years less was more. The first city in the province was of 35 to 55 years in declining to rule .But in 65 years, the first town in the province due to issues arising from the war was greatly increased. First city in 75 years has fallen slightly but rises again in 85 years. Entropy calculations indicate an increase in the concentration of 35 to 85 years in Khuzestan province. So that the entropy factor of 0.747 to 0.692 at 35 years is 85 years.