Impact of migration on the Sustainability of Residential Environments (Case study: Neighbourhood of " Kan" in District 5 of Tehran)

Introduction Following developments in contemporary urban context and the new urban tissue replacement (with new needs and issues) instead of the old urban environment, the importance of urban neighborhoods have been extraordinary. The process of evolution and development of old urban neighborhoods suits the needs of residents, in both individual and social levels. Cities in general and in particular localities have had considerable negative effects on their performance and placement in the evolution of sustainable inner city. What has gripped today’s urban modern neighborhoods in common and specifically in the metropolitan areas like Tehran, is the adverse effects caused by immigration in the last decades. Metropolitan neighborhoods like “Kan” in Tehran have faced with issues like physical dispersion, lack of safety, low quality of environment, community structure degradation, identity degradation, lack of Supplementary housing patterns, the presence of cars, etc. Therefore, review is necessary when considering the various factors for the settlers in the selected areas. These factors include: housing price and level of cultural and living expenses in the area etc. factors in the next priority may be moving -as the next factor- by household income. The presence of different classes with different ownership types (private or leased) could raise issues in different levels to suit different classes of immigrants. Migration at various levels i.e. International, national, and local, subject to a hierarchy of needs, expectations and aspirations in different stages of human life. In fact, human spatial behavior can be a function of values and standards that he has experienced at different times and situations. These values not only comes from his economic, social and cultural conditions, but also is affected by the conditions that the environment imposes upon him. Such values provide explanation to change human’s lifestyle and location. The result of this sentiment - any stimulus that occurs - will follow the social-spatial Impact. The process of interaction between humans and space in the form of social-spatial dialectics has been considered at micro-level (urban areas) due to unavoidable cause-effect relationship between changes in location (inside urban migration) and their social-spatial structure in urban studies - especially analysis of social geography of cities.In the analyzing of urban issues In Iran, focus has often been raised on rural-urban migration, without paying attention to migration within the cities. However, the migration within the cities affects the social- spatial structure of urban areas. This kind of migration is increasing and also has its own rules. Thus, for maintaining urban sustainability, attention to this kind of migration is the inevitable urgency to achieve the appropriate strategies in urban planning. Therefore, among important issues, which must be considered in the organization and realization of Tehran metropolitan sustainability development, migration within the city is included.