Earthquakes are known as a recurrent phenomenon during history. In most cases, they have destructive effects on human settlements and put considerable damage on the citizens. Whereas, The old and erosion texture of the city are the most vulnerable parts to natural disasters. Not paying enough attention to consolidation these textures has led to their increasing vulnerability in a way that there is the most damage in these parts in the smallest natural disasters. This paper, which is based on a quantity-analytic approach, is seeking to investigate and analyze the vulnerability of the Qaradiyan neighborhood as an old texture in Sanandaj city by decadence and intervention indexes using the Fuzzy model to provide strategies that reduce the vulnerability of these textures to earthquake dangers and achieving to urban sustainability. Results of this paper show that high population density, high level of household rate, low level of building ownership, high occupancy rate, small size blocks, narrow and impasse pathway, unavailability to open and suitable spaces, durable buildings and their low resistance of structure to earthquakes are some of the features of this district.
