Assessing the sprawl / compact of the city of Zahedan during the period 1375 – 1390

In recent decades, Iran's cities, such as other cities of the third world countries have encountered significant transformations and in a short-term period, they have reached the manifold of their primary widths. Zahedan, during its 100 year life, has developed in an unbalanced way and has faced a quick development. The 32.5 time development of its population and 34 time development of its width indicate this issue compared to the first census in such a way that the development of this city has been in the horizontal direction and the continuous development of urban constructions have caused the ugly development of the city. Accordingly, in the present study, the correlation between the population and the amount of development and urban sprawl is investigated in Zahedan city using Shannon's and Holden's Entropy Models and Floor Area Ratio (FAR). The findings of the research indicate that according to Holden's model, Zahedan has been suffering the ugly urban development (sprawl) during the period of conducting the study. The entropy coefficient scores indicate the sprawl of Zahedan. Regarding the development of the value gap due to horizontal development and urban sprawl, theSmart and Compact City model is considered as a desired one for future expansion of Zahedan.