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Volume 39, Issue 3 (2024)
GeoRes 2024, 39(3): 1001-1030 |
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Received: 2024/08/22 | Accepted: 2024/10/26 | Published: 2024/09/20
Received: 2024/08/22 | Accepted: 2024/10/26 | Published: 2024/09/20
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Rezaeeparto K. Vulnerability Assessment of the Southern Areas of Tehran City Due to Earthquake Using Layer Overlay System. GeoRes 2024; 39 (3) :1001-1030
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Authors
Katayoon Rezaeeparto *
Earth Science Research Division, Research Institute of Petroleum Industry, Tehran, Iran , rezaeepartok@ripi.ir
Abstract (64 Views)
Aims: The purpose of this research is to investigate and zonate the degree of vulnerability of the southern areas of Tehran against earthquakes.
Methodology: In the first stage; Confirmatory factor analysis method was used to develop vulnerability indices. In the second stage, in order to prioritize the indicators, the fuzzy technique was used in the form of the Delphi method, and in the third stage; Effective indices in tissue vulnerability (based on maximum effect) were drawn in the form of weighted information layers through ArcGIS software, Version 9.2. Finally, with the layering technique, the level of vulnerability was evaluated for the study areas and based on the physical indicators effective in the earthquake; the final vulnerability map was prepared in the study area.
Findings: A number of 15 criteria and 31 indicators were developed as factors affecting vulnerability. From the point of view of the experts, among the effective factors, in order of priority, the maximum acceleration of the ground, the quality of the building and the distance from the fault have the greatest role, and the topographical indicators, the number of floors and the distance from the fire station have the lowest points. Have given the results have shown that areas 15, 18, 19 and 20 have shown more vulnerability than the other investigated areas. This shows that there are more critical indicators in these areas.
Conclusion: Bad condition of physical parts and inappropriate urban uses, inefficient communication network, compact and dilapidated urban fabric, high urban density, bad condition of treatment and relief facilities, lack and inappropriate distribution of urban open spaces, etc. play a major role in increasing the amount of damage to The city has earthquakes.
Methodology: In the first stage; Confirmatory factor analysis method was used to develop vulnerability indices. In the second stage, in order to prioritize the indicators, the fuzzy technique was used in the form of the Delphi method, and in the third stage; Effective indices in tissue vulnerability (based on maximum effect) were drawn in the form of weighted information layers through ArcGIS software, Version 9.2. Finally, with the layering technique, the level of vulnerability was evaluated for the study areas and based on the physical indicators effective in the earthquake; the final vulnerability map was prepared in the study area.
Findings: A number of 15 criteria and 31 indicators were developed as factors affecting vulnerability. From the point of view of the experts, among the effective factors, in order of priority, the maximum acceleration of the ground, the quality of the building and the distance from the fault have the greatest role, and the topographical indicators, the number of floors and the distance from the fire station have the lowest points. Have given the results have shown that areas 15, 18, 19 and 20 have shown more vulnerability than the other investigated areas. This shows that there are more critical indicators in these areas.
Conclusion: Bad condition of physical parts and inappropriate urban uses, inefficient communication network, compact and dilapidated urban fabric, high urban density, bad condition of treatment and relief facilities, lack and inappropriate distribution of urban open spaces, etc. play a major role in increasing the amount of damage to The city has earthquakes.
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