| Summary: | 碩士 === 國立臺灣師範大學 === 地理學系 === 99 === Hazard perception has been a new perspective of hazard research since 1940s; in recent years, hazard perception has future incorporated in the risk assessment as one of the indicators of vulnerability.
Taking Dongshan basin of Ilan County as a cause study, this study, first, collected flood cases from 1961 to 2010, and the data were analyzed in terms of spatial-temporal changes and causes. Besides, three villages – upstream, midstream, and downstream each – were chosen based on the flood frequency. Using age-based stratified sampling, 25 participants in each village were selected and interviewed. Interview data were analyzed and descriptive statistics were used to explore spatial-temporal differences of the residents’flood perceptions and their adjust behaviors. Flood vulnerabilities and its changes were also studied. Finally, factors of vulnerability were assessed in order to understand the spatial difference of future flood risk; and based on the assessment, this study provided disaster-reduction management suggestions.
The results can be listed as below: first, the characteristics of flood of Dongshan basin, including flood frequency, spatio-temporal distribution and cause, are complex and changing. Second, from upstream to downstream, there is a tendency that serious feelings and risk of resident’s flood perceptions are more obvious. Third, there are no significant spatial differences of residents’ adjust behaviors. Fourth, the changes of flood vulnerability are related to socio-economic factors (family numbers, household loss, house floor), perception behaviors, social resources(information accessibility, social network), and the management of government (resources and supports).
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