عنوان مقاله [English]
Nowadays the role and importance of urban green space and its physical and natural effects in urban system and its ecological, social and economic efficiency is deniable. As far as the land use of green space and its capitation in cities is one of the main issues to be considered in planning and urban management. of the effects of green space in cities is adjustment of temperature, increase of humidity increase, air softness, dust absorbance and producing oxygen. For this reason, the green space in every city is considered the breathing lung of that city. In this study, the place distribution of green space and its effect on servicing radius and the functions of urban green space have been studied. Also according to the criteria of locating urban service centers (capacity, compatibility, compliance and dependence), the optimal locating for the construction of green space has been evaluated separately on a scale of local, district and regional in the city of Zanjan. Analysis in this study using statistical software Spss and Arcgis. The results show that not only the current green space of the city of Zanjan is less than the standard; but also it has had not a suitable spatial distribution in the city. Capita, percentage and the lack of green space land use in the existing situation (2006) and the proposed plan horizon (2025) shows that the city of Zanjan according to the standards and the allocation of capita to the urban green space land use (4.99 square meter) does not match with the standards provided by the department of housing and urban development (7-12 square meter). The total area of green space of the city of the Zanjan is about 1,495,605.16 square meters that capita of this land use per person is 4.99 square meter. This land use has devoted the 2.26% of the total area of the city to itself while according to the international standards; the amount of to of the city must be devoted to green space. The proposed capita of the United Nations for green space land use is 20-25 square meter and for the department of housing and urban planning is 7-12 square meter that this amount has a great difference with the city of Zanjan.