碩士 / 逢甲大學 / 都市計畫與空間資訊學系 / 101 / Taiwan locates at an orogeny active area and its geological structure is young. The terrain is usually changed and loose surface layers exist in mountain areas due to earthquakes, resulting in landslide or debris flow hazards during typhoons and rainy seasons. This research applied the logistic regression to predict the landslide potential in the Laonong catchment area. By using logistic regression to analyze the probability of success to the independent variables, a landslide potential map was generated based on the proposed model. Six influence factors of slope, elevation, geology, daily rainfall, Normalized Difference Vegetation Index (NDVI), and recurrence of landslides were used for logistic regression in this study.
The daily rainfall of Typhoon Haitang (2005) and Typhoon Morakot (2009), as well as the NDVI from the satellite images before the typhoons, were used in the logistic regression analysis. The regression model from the two events of Typhoon Haitang and Typhoon Morakot was different and improved to the one derived from single event. The potential of landslides was classified as 5 statuses: high, medium high, medium, medium low, and low. The proposed model was further tested using various daily rainfalls from scenarios to evaluate the potential of landslide in the study area. The estimated landslide areas for cases Typhoon Haitang and Typhoon Morakot were generally at high potential regions. The threshold probability value of 0.4 was determined for best prediction results of 60% success by the proposed regression model in this study.
| Identifer | oai:union.ndltd.org:TW/101FCU05224008 |
| Date | January 2013 |
| Creators | Chia-Yun Hsu, 許嘉芸 |
| Contributors | Tine-Yin Chou, Bing-Jean Lee, 周天穎, 李秉乾 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 80 |
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