International Journal of

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According to several researches sustainable development is based on three different dimensions of sustainability social and economical dimensions and ecological or environmental sustainability. These dimensions are recognized as basic elements of sustainable development. This research tries to evaluate social sustainability at some neighborhoods in Karaj. Considering the fact that urban neighborhoods, as the smallest units of cities have a high importance in cities and their sustainability are a positive step toward sustainable development as well as social cohesion of city. In this research five neighborhoods have been selected with 320 questionnaires for sampling. Assessment of the related variables was made through determining a collection of indicators. The collected data via specialist questionnaires were analyzed using SPSS software. The reason for which Kendall’s test was selected to study the meaningfulness relationship of the research variables and the concept of social sustainability is the largeness and qualitative feature of the N volume. The result of the research is the proving meaningfulness of the relationship between the defined variables and the notion of social sustainability except social participation. Level of social Sustainability in the neighborhoods are not the same and there is high gap between them (about 2.6).In addition education indicator has the highest level of sustainability between the neighborhoods (0.024). Access to the recreational facilities indicated the highest level of difference between sustainable and unsustainable neighborhoods (74%). This means that even in sustainable neighborhoods despite the dependency and happiness of the residents, the rate of participation has been at a low level and the residents do not have a positive view resulted from confidence to the performance of civil managers. In other words, there is a kind of homogenization in this component between urban neighborhoods.

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This paper examines the utility of the air pollution Model (TAPM) in simulating meteorology and dispersion of PM10 and wind data in order to assess The Impacts of Wind Variability Function on Urban Heat Island for the day of 25, November,

2012 in Karaj city that experienced severe degradation in air quality. Drawing, Skew-T diagrams, maps of surface pressure (500hp), omega (850hp) and atmospheric conditions at 300 – 900hp  level are used for analysis. Due to wind patterns, the air pollution behavior is simulated regarding to resolution of 5 km for output amplitude. Simulations of the PM10 and wind data in ten metric levels from three point of city are prepared according to synoptic conditions. Meteorology and PM10  dispersion results indicate that in spite of prevailed wind direction (West to East) in the mentioned day the effect of wind threshold on the air filtration is reduced and heat island formation is occurred as a result of reduction in air flow speed in urban areas. Therefore, it is essential to consider adopted strategies to mitigate urban heat islands such as the principles of bioclimatic architecture,  urban  morphology,  urban  infrastructure-related  measures  (architecture  and  land  use  planning) for  urban planning.

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The problems of distressed urban areas are getting worse year after year. Due to limited resources and Amenities of municipal organizations for solving every problem concerning urban distressed textures, it is essential to determine the priorities of each area based on identified factors and criteria. In distressed areas, there are different circumstances and distinctive citizens with their needs and special expectations, so in this article we face many criteria with fuzziness. This study aimed to apply the fuzzy analytic hierarchy process (FAHP) to prioritize the most important issues for each urban distressed area in Karaj. For this purpose a hierarchical model with 4 main factors (social, physical, environmental and economic) and 17 sub factors were suggested. Four zones of the city (central Karaj, Hesarak, Mehrshahr and Fardis) were analyzed. The findings of the paper suggest that social factors with a weights of about 30% are the most significant problems cause in these areas and physical factors with 27% weight we’re in second place. Among the areas, Fardis and Hesarak areas were most affected by social factors and Central Karaj and Mehrshar had the most priority for physical factors.