Journal of Urban Economics and Management

Increase in urban population and, the growth and spread of physical and social dimensions of cities has a significant impact on urban life, so that nowadays the concept of cities without regarding green spaces and its various forms is unthinkable. Hence the main objective of this research is to improve the quality of green space in the city of Miyaneh. This Research In terms of the target is an applied research and In terms of method is a descriptive-analytical research. After identifying the components effective and factors on the planning of urban green space, these indicators in four areas were evaluated in the Miyaneh. The target population of this research is all the users of parks and green spaces in the city center, in the months of August, September and October 1391. Then by Using Cochran formula, 383 questionnaires with regard to the scale and reach within the park were distributed randomly. Data was gathered by using the study of literature, documentary method and interview with 10 experts who were familiar to the research subject. Using hierarchical analysis process (AHP), the relative importance of each of these indexes has been set the existing. Parks and green spaces, due to the factors considered were evaluated and through identifying shortcomings, deficiencies and required levels for planning the green spaces in the Miyaneh, some optimal solutions were provided. Based on the results, the physical component, has the largest relative importance among other factors and also environmental, social and economic components are in secondary grade. As well as 3 urban areas have the most difficult situation in green space, so it should be a priority in the planning and construction of urban green spaces

Urban green space is one of the most important components in city management and cities’ development given its social and environmental functions and financial and economic aspects. Different species of plants including trees, shrubs, cover crops and flowers or seasonal plants have specific features in terms of climate-compatible of Tehran and water demand. They also have different roles in meeting expected functions of urban green space, particularly prettification and reducing air pollution by producing oxygen. Thus, this paper tries to study selection criteria, assess plant species, and determine appropriate criterion for Tehran green space. Then, it determines relative weight of each one by surveying 35 experts’ view in the form of group analytical hierarchy process (GAHP) method. The obtained weights are instruments for valuation of 60 Tehran’s main plant species done by simple valuation (linear) and TOPSIS methods.  The results indicated that evergreen oak, elm, and silver cypress are the most valuable species. Ranking of plant species were obtained by two mentioned methods in each of four groups that they were almost matched with each other. Using these ranks has increased at least 33 percent of productivity cost of urban green space in replanting project of municipality districts as well as increasing citizens’ satisfaction and life of plant species that is in line with resistance economy.