Investigating the relationship between extreme weather events and damages on soil and water conservation facilities in Taiwan
颱風 ； 豪雨 ； 潛勢溪流 ； 警戒雨量基準值 ； 防災演練宣導 ； typhoon ； extremely heavy rain ； potential debris-flow torrent ； rainfall threshold value for debris-flow warning ； disaster prevention drills and propaganda events
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Taiwan is located in the Pacific Rim. The area of slopeland occupies 73% of total land area of Taiwan. In recent years, typhoons and extremely heavy rains have frequently caused significant debris-flow disasters of Taiwan’s slopeland. Associated damages also have occurred on soil and water conservation and agriculture access road facilities. Due to the lack of investigation on debris-flow disaster loss caused by extreme climate disasters in the past, this research explores the relationship between relevant factors and losses of soil and water conservation and agriculture access road facilities in slopeland areas. Two major types of factors are included in this research: (1) meteorological factors, which include the route of typhoons, the intensity of typhoons, maximum 24-hour continuous rainfall, and maximum average wind speed; (2) disaster prevention and response factors, which include the numbers of potential debris-flow torrent per unit area of slopeland, the rainfall threshold value for debris-flow warning, and disaster prevention drills and propaganda events. Different from the case of extreme weather induced agriculture damages, our results show that there is no significant relationship between the maximum average wind speed and the amount of debirs-flow disaster loss. However, the maximum 24-hour rainfall is positively correlated with the amount of debirs-flow disaster loss. Other positively correlated factors include the numbers of potential debris-flow torrent per unit area of slopeland and the overall budget on constructing soil and water conservation facilities per unit area of slopeland. Several factors have significant negative effects on the amount of debirs-flow disaster loss including the rainfall threshold value for debris-flow warning and the cumulative number of disaster prevention drills and propaganda events. It is worth noting that increasing the budget for constructing the soil and water conservation facilities cannot effectively reduce the amount of debirs-flow disaster loss. On the contrary, the government must continuously devote huge amount of manpower and resources to reconstruction and remediation after disasters. For the government to effectively allocate resources to debirs-flow disaster prevention and response, this study suggests to focus on the residents in the high-risk region by considering relocating them to other safe areas.
社會科學 > 經濟學