An analysis of the Metamorphosis spatial organization of the urban system of Zanjan province

Imbalances and regional imbalances are one of the major challenges of spatial development in Iran which has led to the formation of inefficient and disrupted urban system in the country with the expansion of urbanization and increasing number of cities. The cities of Zanjan province, like most of the provinces in the country, have regional imbalances such as the imbalance of the province's spatial organization. This research aims to understand the differences and changes of the urban system, It has studied the transmutation of the spatial organization of the urban system of Zanjan province during the period 1335to1395. In this research, descriptive-analytical research method and documentary-library data collection method were used. Descriptive-analytical method and library and documentation information using quantitative models: Urban Primacy Index, Two City Index, Four City Index, Mahta Four City Index, Todim model, digital elevation model were used. The results show that spatial imbalance is evident in Zanjan province's urban system and despite 21 urban points in this province, urban growth and development is more specific to the four main cities of Zanjan, Qidar, Khorramdareh and Abhar. Over time, unlike the first urban decline in Zanjan province, the urban system tends to be in equilibrium. Despite the increase in the number of small towns in order to reduce the imbalance in the urban system of the province, we see a large distance from these cities with the first city leading the urban system to imbalance. have given; Other factors that exacerbate this inequality and imbalance include geographical factor, budget allocation in provincial cities, inadequate population distribution and concentration of facilities and infrastructure in Zanjan city and its undesirable role in provincial urban system and insignificant role of cities. And their almost one-sided relationship with the center of the province, the city of Zanjan.