Leila Eshrati; Amir Mahmoodzadeh; Masoud Taghvaei
Abstract
Extended Abstract
Many built-up areas are threatened by multiple hazards which pose significant threats to humans, buildings and infrastructure. However, the analysis of the physical vulnerability towards multiple hazards is a ...
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Extended Abstract
Many built-up areas are threatened by multiple hazards which pose significant threats to humans, buildings and infrastructure. However, the analysis of the physical vulnerability towards multiple hazards is a field that still receives little attention, although vulnerability analysis and assessment can contribute significantly to risk reduction efforts. In this paper, an indicator-based vulnerability approach, the PTVA (Papathoma Tsunami Vulnerability Assessment), was further developed to be applicable in a multi-hazard context. The resulting multi-hazard version of the PTVA consists of four steps: the identification of the study area and relevant hazards as well as the acquisition of hazard information, the determination of vulnerability indicators and collection of data, the weighting of factors and vulnerability assessment, and finally, the consideration of hazard vulnerability. After the introduction of the newly developed methodology, a pilot application is carried out in a part of Shiraz municipality located in the Iran. In this case study the vulnerability of buildings and humans is assessed. The implementation of the methodology leads to reasonable results indicating the vulnerable buildings and supporting the priority setting of different end-users according to their objectives. The constraints of the presented methodology are: a) the fact that the method is not hazard-intensity specific, thus, vulnerability is measured in a rather qualitative and relative way, b) the high amount of data required for its performance, and c) Indicator-based vulnerability approaches are flexible and can be adjusted to the different hazards as well as to specific user needs.
Introduction
Multi hazard pose a serious threat to human life. It can cause considerable damages. The evaluation of the expected losses due to multi hazard requires a risk assessment. Multi-hazard risk assessment allows the identification of the most endangered areas and suggests where further detailed studies have to be carried out.
Aim: This study aims to give a new methodology for Multi-Hazard Risk Assessment that makes the comparability analysis of vulnerability easier for different hazards and accounts for possible triggering (domino) effects.
Methodology
Methods used in this paper are based on theoretical approach and documentation. Two types of hazards will be assessed, namely earthquake and fire following earthquake.
Statistical Analysis: Semi-quantitative and quantitative approach would assess risk rates at both regional and local levels.
Results and discussion
In this study, representation of a new methodology for multi hazards risk assessment includes determination of a model with parameters, consideration of the indicator-based pattern of vulnerability assessment that selected all of the relevant indicators and presented new classification of indicators based on comparison to different hazards and possible triggering (domino) effects. This means that a potential multi-hazard indicator could be higher than the simple aggregation of single risk indicators calculation.
Conclusion
The focus is on establishing a general overview of the emerging issues, and indicating how hazard relations can be considered in multi-hazard studies. The hazard relations are identified and studied by means of a new method and the overlay of hazard areas to determine overlaps in final multi hazards map.
Amir Mahmoudzadeh; Iran Ghaazi; Maryam Askari
Abstract
Abstract[1]
As the most devastating natural disaster,the earthquake is considered to be the cause of human casualties and significant economic losses in the country, which is far more severe in urban worn out textures, because the worn texture has a distinct and unique structure. The area of the worn ...
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Abstract[1]
As the most devastating natural disaster,the earthquake is considered to be the cause of human casualties and significant economic losses in the country, which is far more severe in urban worn out textures, because the worn texture has a distinct and unique structure. The area of the worn out texture of Ilam city is 374 hectares, which covers 19% of the total area, including the old parts and the central texture of the city. The research method in this study is descriptive-analytical and field research. The purpose of this study was to evaluate the management of earthquake crisis in Ilam's worn-out texture in which, indices such as type of materials, age of buildings, number of floors, type of uses, occupation level, quality of buildings, population density, width of passageways, and area have been studied. The results show that the building materials account for the highest weight and the other factors are a function of the condition of the materials used in the structure. The output vulnerability map showed that out of the total area except the passageways, 8.9% had very high vulnerability, 59% had high vulnerability, 23% had moderate vulnerability, 3.6% had low vulnerability, 5.5% had very low vulnerability and overall, 67.9% of the worn-out texture area is vulnerable based on existing indicators.The research proposals have been presented in three areas: high vulnerability, moderate vulnerability and low vulnerability.
[1] - به دلیل کیفیت نامناسب متن چکیده مبسوط انگلیسیِ ارائه شده توسط نویسنده مسئول مقاله، نشریه به ناچار اقدام به ترجمه مجدد متن چکیده فارسی و انتشار آن به جای چکیده مبسوط انگلیسی نموده است.
