Abstract
In recent years, global warming has gradually become obvious, thus created the climate change. Typhoon Morakot attacked Taiwan and brought heavy rainfall in August, 2009. In mountainous areas including Central and South Taiwan, the flood and debris flow disasters were induced by the typhoon. In this study, Changhua City is selected as the research region and the Delphi method is employed to interview experts and establish comprehensive evaluation criteria for assessing the evacuation plan on disaster areas. The concept is to combine the landslide potential analysis by geographic information systems with the flood or debris flow maps into the potential hazard map. Meanwhile, analytic hierarchy method (AHP) is comprehensively carried on the expert questionnaire survey for the potential hazard map of the compound disaster states. It should be useful for the local government and native people in the future.
Highlights
With the gradually apparent global warming causing the climate change, Typhoon Morakot attacked the central and southern Taiwan in August 2009 and resulted in serious disasters
The entire Taiwan experienced such heavy rainfall during the attack of Typhoon Morakot that various disasters were caused by long-period, high-intensity, and wide-spread rainfall, such as floods, debris flows, landslides, and landslide-dammed lakes [2,3]
With analytic hierarchy process (AHP) to proceed expert questionnaire survey and to analyze the weight of various factors, this study aims to collect map data related to landslide, flood potential analysis, debris flow potential areas, and land use in Changhua City
Summary
With the gradually apparent global warming causing the climate change, Typhoon Morakot attacked the central and southern Taiwan in August 2009 and resulted in serious disasters. With the unusual route of Typhoon Morakot, its long stay in Taiwan, and the effect of southwest monsoon, the heavy rainfall caused major disasters. According to the estimation of Water Resources Agency [1], the rainfall reached the world extreme record. Regarding the historical rainfall in one day, Typhoon Morakot was ranked at the top. Climate change resulted from global warming is expected to result in similar events in the future. The entire Taiwan experienced such heavy rainfall during the attack of Typhoon Morakot that various disasters were caused by long-period, high-intensity, and wide-spread rainfall, such as floods, debris flows, landslides, and landslide-dammed lakes [2,3]
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