The Assessment of Quality of Access to Urban Open Spaces Based on Condensation Analysis of Open Space in the Time of a Natural Disaster in Urban Areas (The Case Study of Tabriz)

Open spaces play an important role in reducing the amount of work and the results of natural and artificial disasters. The main function of it، in the time of earthquake، is separation of one area with potential risk from another، and thus prevents the development of chains of events and focused of activity of destructive forces. This study shows that open spaces within the city of Tabriz can be divided in to four main categories as urban green spaces، arid lands، urban gardens and farms within city limits in which open spaces can be effective in reducing losses from earthquakes and play important role to optimal management of crises in various stages of crises caused by the earthquake. Results show that all open spaces in urban area of Tabriz، including aforementioned 4 categories have an areas of about 11722 ha، the level of which is equivalent to 47% of the total surface area of ​​Tabriz. Analytical results of this study show two major subjects; the first however، from the perspective of quantity compared with other cities open spaces seems a little too common but it should be noted that the distribution of these spaces in different parts of Tabriz is very heterogeneous. Secondly، most of the aforementioned levels include arid lands (7158 ha) and form land (3592 ha) in located in the outlying areas of city of Tabriz.