Evaluating the vulnerability of Old Texture with passive defense approach using IHWP method (Case study: Khobakht neighborhood)

Due to the organic and old texture, high population density, low width of roads, proper accesses, etc., old texture are more vulnerable than other urban areas when intentional man-made threats occur. The purpose of this research is to evaluate the vulnerability of Shahid Khob Bakht neighborhood in District 15 of Tehran from the point of view of passive defense. In terms of the type of research, the present research is considered as an applied research and in terms of the nature of the research, it is considered as a descriptive-analytical research. Library method, interview and observation (qualitative) were used, and in order to evaluate the vulnerability of the neighborhood, Delphi questionnaire (quantitative) method was used. The analysis method of this research is the fuzzy IHWP method in GIS software. The research results show; The vulnerability of the neighborhood is high in the central and south-eastern parts of Shahid Ebrahimi Street and Shahid Bani Hashem Street, and the least vulnerability of the neighborhood is in the north of it, between Qurbani Street and the edge of Imam Ali Highway. The reasons for the neighborhood's vulnerability include the unfavorable and worn-out quality of the neighborhood's texture, the lack of multi-purpose centers for the function of shelters and the storage of essential items, and the lack of sufficient green spaces for temporary accommodation in the center and south of the neighborhood, the low width of roads and high population density in the south. He pointed to the east of the neighborhood. At the end, considerations and suggestions related to aligning renovation plans with the principles of passive defense and also reducing the vulnerability of the neighborhood have been presented.