The Impact and Adaption of Typhoon Hazard in Taiwan : A Case Study of Typhoon Morakot 2009(<Featured Articles>Mega-Earthquake and Geomorphic Hazards)
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Taiwan is located not only within an active tectonic area, but also at monsoon area with abundant annual rainfall. These circumstances result in a great variety of landscape forms and habitats. Landslides and debris flows in the mountain areas caused by heavy rainfall happen commonly. Typhoon Morakot in 2009 was a typical example. Over a four day period between 8-11 August 2009, the Alishan weather station recorded a rainfall accumulation of 2,965 mm. The intense rainfall caused several landslides, generated landslide dams and floods which were responsible for more than 677 deaths in Kaoshiung and Pington counties. This was the severest damage caused by heavy rainfall in the last five decades. Economic losses totaled over one billion US dollars across the whole island. The present research area focuses on Launon River of southern Taiwan. This paper review (and analyze) the power and influence of Typhoon Morakot over the island. Morphological study demonstrates that there are several types of erosion from this event. Aerial photo and satellite images interpretation and comparison study also explain various types of hazard occurred in this typhoon event. The Morakot typhoon also demonstrates that high rise river terraces in Taiwan may be flooded by heavy rainfalls or landslide dam, not only caused by tectonic uplifting. A series of adaption policy are proposed as management measures. It is suggested that the culture of aboriginal tribes should be taken into account in a decent way. Early warning system of typhoon and flooding should be adopted and developed in the event of coming typhoons for both low-lying areas and high mountain areas.
- 2012-10-25
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- The Impact and Adaption of Typhoon Hazard in Taiwan : A Case Study of Typhoon Morakot 2009(Mega-Earthquake and Geomorphic Hazards)