Based On The Multiobjective Decision Theory Of Vulnerability Evaluation Model Of Hazard-affected Bodies

Since21st century, a range of disaster happened in the world, causing serious losses to people’s lives and property, affecting social harmony and sustainable development. At present, our country is in a critical periods which the disasters has a high occurring frequency, this was reflected in the following aspects:firstly, our country has a vast and diverse natural environment, vulnerable to various natural disasters; secondly, our country is in a period of rapid development, social and natural environment has strong instability. Besides, disasters increasingly show new features: more unexpectedly, more suddenly and more complex, traditional means are difficult to respond to disasters. How to effectively deal with all types of disaster events, and improve the level of emergency response capability is one of important issues related to public security, national stability and rapid development.Disaster damage level is caused by the disaster and the affected region. Existing research mainly focused on the construction of the emergency response system and the hazard factors, having relatively less research about vulnerability. Vulnerability research is to analyse the vulnerability of region, explore how to evaluation properly, and achieve the purpose of reducing disaster losses ultimately. Vulnerability studies focus on the regional system, it provides scientific basis for the developing and improving the emergency management measures by qualitative and quantitative analysis. Besides, it makes up for the relative shortage of emergency management and is beneficial for the perfection of emergency management disciplines, having strong theoretical significance.The research is based on the vulnerability of the affected region and proposes a systematic evaluation model. There are two parts in the model:one part is used to calculate the weights of criteria, and the other part is a combination model used to assess the region’s vulnerability. In the weight calculation model, fuzzy theory and the analytic hierarchy process (AHP) method are combined, it completes the translation from the qualitative to quantitative analysis based on experts’ opinions. In the combination model, for the inconsistency of multi-objective decision-making (MCDM) methods, a hybrid evaluation model is proposed based on the consistency coefficient, it can combine the relative ranking order and the evaluation value effectively. Thus, the results of vulnerability evaluation will be more scientific, more reliable.In the empirical research, by a case study of Chinese31region’s vulnerability for earthquake disaster events, the effectiveness and practicality of the proposed model has been well demonstrated. Firstly, it may be unexpectedly that for the less earthquake happening while more economically developed areas (like Shanghai, Beijing and so on) have stronger vulnerability. This just indicates that the analysis of disaster risks must combine the dimensions not only include the hazard, disaster, environment but also the vulnerability aspects, in one word, the vulnerability is very important for the emergency management of disaster. The results also demonstrated that the proposed combination model can effectively solve the inconsistency problem of the.multi-objective decision-making methods, and improve the consistency of the final evaluation value.