Abstract
There are many uncertainties, such as the frequency of occurrence, magnitude, and extent of anticipated damage, in assessing risk related to natural hazards, such as earthquakes and floods. Therefore, a natural hazard risk assessment method that incorporates the theory of probability is being introduced. As just described above, many studies are made on natural hazard risk assessment methods and the methods are applied to practical business. Many regions of this country are often hit by two or more natural hazards, such as earthquakes, typhoons, heavy rain, and snow, and volcanic eruptions. To draw up appropriate proactive and follow-up programs for disaster damage prevention, it is necessary to study a multiple natural hazard risk assessment method. This paper describes a proposal of practical method to assess multiple natural hazards and the case studies of the multiple natural hazard risk assessment based on the results of researches achieved up to now into the methods of assessing risk associated with individual natural hazards.
