Analysis of Urban Systems in East Azerbaijan Province during 1335-1385

In recent decades, cities have greatly expanded and countries have begun urbanization and increased population with higher speeds. The population growth has been noticed in large cities and the resulting has caused the concentration of population in these cities and following that regional and national equilibrium disruption. This research focuses on the study and analysis of urban systems in East Azerbaijan province. Methods include a combination of documentary, descriptive and analytic procedures. We have used Zipf rank-size rule, the rank-size adjustment, the entropy index, urban concentration index, Lorenz curve, Gini coefficient and Bvzhvgarnyh triangle models in this study. Results of the research show that Tabriz city is the primate city in the urban network due to its centrality in political, administrative, financial sections. The role of small and middle cities is very low in the provincial urban system. Ultimately, yet urban hierarchy in the urban network of East Azerbaijan has great departure from Zipf's Rank-Size and Behforooz adjustment models. Therefore, providing services and strengthening small and medium cities and reducing the growth of large cities in the province can lead to optimal distribution of the urban hierarchy in the area of study.