Disaster susceptibility analysis of land use and landslide in Tatong town, Taiwan.

• Main Author: 李承玫
• Other Authors: Lin, Hsueh-Mei
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/72784668622580955620

碩士 === 國立臺灣師範大學 === 地理學系 === 102 === Landslide is a common phenomenon in Taiwan. If it affected people’s life or properties, that has become slope hazard. According to the hazard in specific time and space, its susceptibility could be calculated. This study defines landuse type data which is from National Land Surveying and Mapping Center as one of the condition of hazard. When landuse types interact with the physical factors of any environment backgroungs could yield hazard, and the susceptibility value could be generated. This is the concept of susceptibility. As for study method, this study applied Logistic regression which is commonly used in recent landslide studies. The study area must be provide with plentiful landuse types and vulnerable physical environment, so Tatong town was choosed. Human-land relationship is the structure in this study. To begin with, the impact of “human to land” was evaluated by the landuse types to landslide in Tatong town. In this procedure, this study selected factors by collinearity diagnosis which help to discover and eliminate multicollinearities. 3 influential factors was obtained, that were landuse types, crop distance and road distance. Sencondly, the impact of “land to land” was assessed by physical factors to landslides, and this study acquired 7 influential factors, that were DTM, slope, aspect, geology, river distance, 24 hours maximum precipitation and annual rainfall by collinearity diagnosis as the same. This two steps focused on the evaluation of “factors to land”, and the aim was to find the causal factors which could precisely explain the reason why makes landslide. Moreover, this study have to combine the landuse factors and physical factors so that could generate hazard susceptibility. And then put this 10 factors into univariate tests of association and Logistic regression, after deleted the aspect and annual rainfall factors which were uninterpretable, the 68.3% explanation model was obtained. This study use statistics methods to demostrate the susceptibility of landuse type and landslide, by this we could create hazard suceptibility maps in Tatong town. In order to utilize the susceptibility value and susceptibility maps practically, we carried out field works and interview with residents to revise the study to achieve hazard prevention.