درخت حوزه‌های تخصصی

What is called the problems of Tehran metropolis now a days, is deep- rooted in the policies ofurban planning in our country. Since not far past up to now, immigration from all over the country to Tehran, irregular growth of urban population, inconsistency with urban infrastructure development, environmental pollution and low quality of living areas, erosion of self -growing fabric in most areas which get erosion very quickly due to not being benefited from minimum constructional standards, service and urban infected organ are all those problems that a city such as Tehran is confronted with. These cases caused that the greatest growth center of the country loses its capability of attracting the possibilities and parameters needed for efficient development and due to heavy pressure imposed by other towns and villages, this city is now suffering from serious problems which only by allocating extra budgets and additional funds, may be temporarily decreased. The topics which will be discussed in this article are those problems arisen from immediate neighborhood of two heterogeneous fabrics which have not been properly paid attentions to. So it has been tried in this article to address the heterogeneity in Tehran, caused by economic and social problems. In this article different aspects of the issue from urbanization viewpoint with analytical approaches and the existed challenges have been addressed.

Ecological destruction in human-dominated landscapes has significant impacts on environment sustainability internationally. Landscape planning can play a role in mitigating the effects of human-related activities. One element of landscape planning involves the analysis of the biological, spatial and social arrangement of areas in an urban environment and identifying characteristics that are underrepresented in urban natural public spaces. In this study, the quality of public spaces resulting from the regeneration of Tehran’s river-valleys’ natural environment is assessed in relation to landscape ecology principles. We use the components of Bio-spatial-social Logic, Eco-environmentalsocietal Function, Mind-experiential-aesthetic Logic and Eco-environmental-societal Excellence, as the components of a framework, to exامینe the quality of existing urban natural public spaces and to define deficiencies in the current urban landscape system. Based on multivariate ecological, environmental and societal space, the evaluation made by this component model indicates that the principles of landscape ecology have been disregarded in Tehran’s Rivervalleys land development and various ecological problems have been evolved from its river-valleys’ regenerating projects. Our criterion is based on the alteration of landscape’s content composition and spatial configuration variables to eco-environmental-societal excellence features. The analysis provides a systematic, function evaluation of urban natural public spaces, in three hierarchical levels of Environmental Equilibrium, Geographical-anthropological Sustainability and Eco-environmental-societal Excellence features. Some strategies are introduced for Tehran’s rivervalleys’ landscape variables change.

The intervention of urban design in Irans architectural structures has been for many years a challenging issue for architects and urban designers over their professional realm. The preservation of architectural structures in Iran has always resorted to extremes. This control and direction has sometimes resulted in exclusion of architecture position and has sometimes, once faced with lack of proper direction, led to confusion in urban realm and environment. This study reviews the theoretical literature including issues such as context, urban design realm as well as urban design control and then investigates a number of case studies selected from urban design measures carried out in Iran in order to identify the weaknesses and the reasons behind them. In regard to the theoretical basis achieved through literature review and the current procedures in Iran and also an analytic framework research, it seems that through modification of the executive system, implementation process for projects, application of urban design review tools for projects controlling, attention to gradual enlargement of cities and lack of certainty in design predictions in urban design process, the current challenge in Iran among architects and urban designers can be minimized. So the results of this analysis will illustrate a new vision- a native one - for alternative policies in relation between architecture structures and urban design controls.