An integrated flood risk assessment model for property insurance industry in Taiwan

Taiwan is located in an area affected by Northwest Pacific typhoons, which are also one of the most important sources of rainfall to the island. Unfortunately, the abundant rainfall brought by typhoons frequently produces hazards. In recent years, typhoons and floods have caused serious damage, especially Typhoon Morakot in 2009. In this study, a probabilistic model is developed based on historical events which can be used to assess flood risk in Taiwan. There are 4 separate modules in this model, including a rainfall event module, a hydraulic module, a vulnerability module, and a financial loss module. Local data obtained from the Taiwan government are used to construct this model. Historical rainfall data for typhoon and flood events that have occurred since 1960, obtained from the Central Weather Bureau, are used for computing the maximum daily rainfall for each basin. In addition, the latest flood maps from the Water Resources Agency are collected to assess the probable inundation depth. A case study using the local data is carried out. Assessment is made to predict possible economic loss from different financial perspectives such as the total loss, insured loss, and loss exceeding probabilities. The assessment results can be used as a reference for making effective flood risk management strategies in Taiwan.

[1]  Ralph A. Wurbs,et al.  Modelling Uncertainty in Flood Studies , 2001 .

[2]  Wen-Ko Hsu,et al.  Catastrophe risk modeling and application-risk assessment for Taiwan residential earthquake insurance pool , 2006 .

[3]  J. Maršálek,et al.  Flood Risk Management: Hazards, Vulnerability and Mitigation Measures , 2006 .

[4]  Albert S. Chen,et al.  Impact of Flood Disasters on Taiwan in the Last Quarter Century , 2006 .

[5]  Failures Associated with the 2004 Mindulle Typhoon in Taiwan , 2008 .

[6]  Ming-Chou Ho,et al.  Why are flood and landslide victims less willing to take mitigation measures than the public? , 2008 .

[7]  Tomoya Shibayama,et al.  Effect of a global warming-induced increase in typhoon intensity on urban productivity in Taiwan , 2009 .

[8]  Chung-Hung Tsai,et al.  An earthquake disaster management mechanism based on risk assessment information for the tourism industry-a case study from the island of Taiwan , 2010 .

[9]  Tim Li,et al.  What causes the extremely heavy rainfall in Taiwan during Typhoon Morakot (2009)? , 2010 .

[10]  Z. Kundzewicz,et al.  River flood risk and adaptation in Europe—assessment of the present status , 2010 .

[11]  A. A. Markus,et al.  A computational framework for flood risk assessment in The Netherlands , 2010 .

[12]  L. Lai Risk estimate of rice damaged due to flood , 2010 .

[13]  Mahendra Singh Nathawat,et al.  Waterlogging and flood hazards vulnerability and risk assessment in Indo Gangetic plain , 2010 .