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碩士論文公告區 |
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| 年度： | 96 | |
| 姓名： | 王美惠(Mei-Hui Wang) | |
| 論文題目(中)： | 應用SPOT衛星影像及GIS於崩塌地潛感分析之研究-以稍來溪為例 | |
| 論文題目(英)： | Application of SPOT Satellite Images and GIS for Landslide Potential Analysis-A Case Study of Shao-Lai River | |
| 摘要(中)： | ||
| 台灣地區在經歷921大地震之後，山坡地時常發生崩塌及土石流災害，若能掌握崩塌潛勢較高之區域，針對其崩塌潛勢施以不同程度的邊坡保護並建立災害影響範圍，便可降低災害的影響程度。 本研究以稍來溪為崩塌潛勢分析之研究對象，利用921集集大地震、桃芝颱風、72水災等不同災害時期之SPOT衛星影像結合數值高程模型（DEM）資料以及航照圖，應用地理資訊系統（GIS）、影像分類法（非監督式分類）及常態化差異植生指標（NDVI）對崩塌地的分析，並建立適用於本流域之崩塌地判釋方法，以進行崩塌地判釋。再將崩塌判釋結果與所選定之因子進行套疊，統計出各因子中的崩塌百分比，以不安定指數法建立權重值，最後將集水區內區分為五個等級潛感程度，繪製崩塌潛感圖。研究透過桃芝颱風後之崩塌地調查資料與研究結果比對分析，有96.12 %之災害產生於中潛感區至高潛感區之間，至於因子對研究區域內邊坡穩定性影響較大者依序是地質、高程、植生覆蓋因子。本研究所建立之崩塌地判釋方法及崩塌地潛勢分析方法皆可作為未來崩塌地潛感分析之參考應用。 |
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| 摘要(英)： | ||
| After the 921 earthquake experience, there are often landslides and debris flows occurred in the Taiwan slope lands. If it is able to control the higher potential landslide, and to offer different-level slope protections from landslides and to establish the range of disasters, then the effect of disasters will be reduced. Using the Shao-lai River as a subject of the landslide potential analysis, this research adopts the data & aerial photographs, obtained from SPOT Satellite Image integrated with the Digital Elevation Model (DEM) during such different disaster periods as 921 Chi-chi Earthquake, Toraji Typhoon and 72 Flood Disaster, and also applies the Geographic Information System (GIS), the Image Classification (Unsupervised Classification) and the Normalized Difference Vegetation Index (NDVI) to make a landslide analysis. Besides, this research also establishes a method of landslide interpretations that is applied to this basin. After the interpretation, this research overlaps such result and its selected factors to statistically calculate the percentage of landslides. Using the Instability Index to set up the weight, this research ultimately divides the potential of watershed areas into five classes to draw up a landslide potential chart. With the comparative analysis of post-Toraji-typhoon landslide survey data and its result, this research finds that 96.12% of disaster occurrences lie in between medium and high potential areas. For the effect of factors upon the slope stability in the target area, it is geologic, elevation, and vegetation coverage factors in sequence from the highest to lowest. The methods of both landslide interpretation and landslide potential analysis established by this research can be used as a reference for the landslide potential analysis in future. |
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| 檔案： | 沒有相關檔案 | |
| 相關連結： | http://ethesys.lib.cyut.edu.tw/ETD-db/ETD-search-c/view_etd?URN=etd-0828108-110250 | |