Determining Hierarchical System of Lorestan Province Cities from 1956 to 2011by Using Neighborhood, Entropy, and Class Conflict Limit Models

Not only lacking of attention to urban hierarchical system and city center distribution fashion in a region but also the rapid growth of urban settlements cause to lead issues such as immoderation and fragment in cities spatial structure; incorrect political and economic decisions and immethodical planning that provoke this study. This research is based on the evaluation of Lorestan Province's urban hierarchy. The data of this descriptive-analytical research is collected via library-documentary. Prevalent urban and region planning models such as class conflict limit; the nearest neighborhood analysis and the entropy index have been used to analyze the data. Research result indicates that Lorestan Province's urban hierarchy tends to become moderate (2.15) by considering the nearest neighborhood parameter. The entropy index tended to 1 based on normal status in most analyzed periods. Therefore, the space distribution in Lorestan Province's urban areas has been moderated through this study based on results of two models which is mentioned earlier. Regarding class conflict solution model, population distribution in Lorestan Province's urban areas has been fragmented and immoderate from 1956 to 2011.As a matter of fact, Khoramabad City, as a political, business and economic center; and Borujerd City, being a historical background, natural position, and industries growth in this city, have attracted the most population in comparison with the other cities. At last, this study suggests a couple of guidelines to improve hierarchical system.