Analysis of Physical Criteria of Urban Sustainable Communities emphasized on Iran hot and arid climate

when issues of sustainable development were raised, different scales have been introduced for executing them in city. Although many definitions of sustainable development have been given in large scales, its concept has not been certainly classified in local scale while urban communities have been very important and their strengths and weaknesses can be communicated to the entire city in different dimensions and can affect its efficiency. The question is raised here why the modern communities are not necessarily efficient and life quality has decreased in them though dimensions of the issues are completely evident in urban communities and one can find suitable solution for any deficiency.
Today in most developing countries there are many developments in the old urban texture and their replacement with new texture which contain lots of problems. So that when a comparison between the new textures is done with the older community, more problems will be found. The purpose of this paper is to explore the properties of these older Communities in terms of physical aspects. The hypothesis of this paper is that the physical characteristics of local-traditional Communities in the hot and arid climate of Iran have some principles that will lead to sustainability. In order to prove this hypothesis, the surveys have been used in areas of the desert cities. The paper finally reaches the conclusion that the local-traditional Communities in the hot and arid climate of Iran follow the sustainability criteria in terms of physical aspects.