COASTAL DISASTER RISK ASSESSMENT AND DESIGNATION OF PROTECTION ZONING IN TAIWAN USING GIS
Author(s)
LIEN KWEI CHIEN, WEI PO HUANG, CHIH HSIANG HSU, CHING CHIEH HSIEH, CHEN YANG FANG
Abstract
Due to the loss of coastal land by intensified global climate change, the threat to the lives and property of people is becoming more serious, and the disaster risk assessment and management of coastal areas is becoming an important issue. Based on the Coastal Management Act, in this study, the four hazard factors such as sea-level rise, subsidence, storm surge flooding, and coastal erosion are discussed. Further, the hazard index and the designating principles for coastal protection zone are established and designated as first-grade and second-grade coastal protection zones. In addition, the vulnerability index includes physical factors’, natural environmental factors’, social-economic factors’, and resilience factors’ relationships with urban development. Use of the Pareto ranking method can remove the weight factor to establish a comprehensive assessment of the index rating respectively. Then, combined with coastal hazards and the vulnerability index for disaster risk analysis of coastal areas, a risk map can be generated via geographic information systems. The study results can provide a reference for disaster adaptation and coastal management and utilization.
Keywords
Coastal Zone Management Act, protection zone, vulnerability index, hazard factor, risk assessment, GIS
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