Review the Role and Function of Urban Planning in Realization of Historic Sustainable Area of Yazd City (Case study: Historic Texture of Yazd City)

Beginning the social life of each urbanite  and communicate with others begins from the neighborhood, and urban neighborhoods as the most distinguished  unit of urban spatial organization play an important role in urban sustainability. In the theory of human-based development, sustainability at the local areas level ( as comprehensive concept of social, economical , environmental and physical c) and also citizenship are the two fundamental accepted principles which are introduced as  the most general conceptual principles in different societies  whether developed or under developing; but implementation of these principles and achieving its appropriate structures  depends on the organization and efficient management system that three separate but interconnected environment, society and economy loops leads to the sustainability of the neighborhood. The present research has studied  the neighborhood sustainability situation and urban management role in its realization in the historic texture  of Yazd. To this aim, descriptive – analytical and monitoring methods have been used in the form of fuzzy logic technique and statistical tests of correlation and linear regression. The results show the negligence of the responsible authorities regarding the  sustainability criteria of historical texture, therefore in spite of  fluctuations sustainability values from 0.474 to 0.312 in the Godale-Mosalla to Zoroastrian neighborhoods, but the results show unsuitable conditions of sustainability and locating the neighboring textures in poor class. On the other hand, despite the impact of urban management in environmental dimension of neighborhood sustainability, but generally relationship between neighborhood sustainability and urban management variables and correlation are not acceptable and urban management in other aspects of neighborhood sustainability is not effective. Thus, paying attention to systematic and professional approaches with citizen participation can lead to an optimum  model for neighborhood sustainability and active role of urban management and conservation of the historic texture of Yazd city.