Proposing a new model to determine urban green space capitation (Case Study: Tehran Metropolitan)

Today, the concept of cities regardless of its green space in its various forms is unimaginable. Uncontrolled and unsustainable urban development that causes severe environmental pollutions makes obvious the necessity of paying attention to this issue. The significance of urban green spaces is to the extent that this necessity is considered one of the indicators of development in communities, in such a manner that determining green space capitation is one of the outstanding challenges facing the urban planners, for spatial differences and environmental inequalities in cities cause the inhabitants of cities require green spaces in a certain amount. Determining green space capitation from the United Nation is 2025 square meters and green spaces capitation in Iran cities is 712 square meters which is not true for all Iranian cities, a model should be built that determine the needs of each citizen of their green space according to environmental needs. In this paper the authors have tried to specify the green space capitation of Tehran city in different areas through building and presenting a model. In this method, parameters such as latitude (φ), the annual average temperature (T), the amount of air pollution (P), density of people per hectare (P/ha), the height above sea level (AL), and participation (R) have been used. Undoubtedly, such proposed capitation is true for the cities that are morphologically and topographically incongruous.