A CASE STUDY OF VULNERABILTIY ASSESSMENT IN THE SEDIMENT HAZARDOUS AREA BY DECISION ANALYSIS

The proper direction toward development or mitigation of the disaster risk reduction plan (DRRP) is a pressing problem. This study focuses on this problem to estimate the regional vulnerability based on the current data and its implications on the proper DRRP direction in terms of multi-criteria decision method. A catchment with high frequency of sediment disasters in central Taiwan was determined as the study area and divided into 9 sub-areas. To proceed with this method, several criteria under the two main constrains, development and regional vulnerability were considered. 5 criteria are calculated from the data include land use data, the current government policy, the economical and social data, and the mitigation controlling measure efficiency. The results show the most appropriate solutions in the most stable situation. Some directions match with current land use regulations of 9 sub-areas. This result can be applied as an example and direction for the sediment disaster DRRP in the catchment scale.