DEBRIS FLOW RISK RANKING AND MANAGEMENT - A CASE STUDY IN TAIWAN

This study conducted the debris flow quantitative risk analysis for 148 debris flow potential torrents in Taiwan following the concept of Risk=Hazard×Exposure×Vulnerability, the calculation result of economic losses and fatalities were generated into annual average loss to provide the same standard for risk ranking. For government or agencies, different types of ranking could be conducted and proper risk management strategies could further proposed. Also the current risk treatment options for debris flow hazard in Taiwan were listed and displayed with spatial and frequency distributions, together with the analysis result of 148 torrents a better management strategy could be suggested in the future.