| Summary: | 碩士 === 國立成功大學 === 都市計劃學系 === 104 === Because of extreme climate, the mountain villages with sensitive and vulnerable environment often get impacted by inundation and debris flow from typhoon. 70% of land of Taiwan is covered with mountains. Due to inappropriate development, overuse and fewer access roads, occurrence of disaster becomes more frequently and rescue actions are often postponed.
Risk assessment and risk map are common ways to make mitigation strategies. However, risk map is generally established through administrative boundaries of county or township, neglecting of different geography in a county or township is eventually underestimate or overestimate the risk. Besides, mitigation is the most important phase of disaster management, but the variation of risk after disaster is often ignored. If every phase can be assessed and compare with each other, it will be helpful for reducing risk and response.
In order to prove that geography and different phase of risk management will affect disaster risk, this study used DEM to classify the geography of Kaohsiung City to plain, slope land, tableland and valley, taking the phases of mitigation and response to compare the variation of risk. By AHP expert questionnaire, it showed that different geography and phases of disaster management did affect the exposure. In addition, this study used PHD-model to simulate flooding to combine the result of AHP to assess risk in mountain villages. The results showed that the risk was diverse in the phases of mitigation and response. In conclusion, high variation of risk presents the area will be affected easier and get higher loss.
|
|---|
