姓名 |
林季諍(Chi-Cheng Lin) |
電子郵件信箱 |
g8911041@hotmail.com |
畢業系所 |
營建工程系碩士班(Department and Graduate Institute of Constrction
Engineering) |
畢業學位 |
碩士(Master) |
畢業時期 |
95學年第2學期 |
論文名稱(中) |
應用主成份分析法與不安定指數法於河川流域崩塌潛勢影響評估-以陳有蘭溪為例 |
論文名稱(英) |
Application of Principle Component Analysis and Dangerous Value
Method on Landslide potential Analysis Using Chen-Yu-Lan Creek
Basin |
檔案 |
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|
論文使用權限 |
校內外完全公開 |
論文語文/頁數 |
中文/85 |
摘要(中) |
本研究的目的是應用地理資訊系統(GIS)之技術,首先配合不安定指數法之概念,建立一套評估區域性坡地安定之計量分析方法,針對不同狀況建置適宜之製圖模式,分析推論並設定各項影響災害發生的關鍵環境變數因子,進行崩塌潛感圖之建置。給予個別崩塌影響因子評分及權重,再透過GIS製圖模式的運算,評定崩塌敏感區之等級及空間分佈情形。本研究亦嘗試建立一套較合理的區域性山坡穩定評估流程,進一步將主成份分析法引入山崩潛感分析中,分別以上述兩種方法進行山崩潛感分區,選擇陳有蘭溪集水區為研究對象,經資料蒐集後萃取之山崩潛感因子包括:坡度、高程、土壤、土地利用、距河系距離。
本研究結果發現不安定指數法在分析危險區域、危險河道、辨識率的表現上都明顯優於主成分分析法;另外,在本研究區域崩塌潛感分析中,高程、土壤、距河系距離等三個因子,扮演著關鍵性的角色。再者,單獨以不安定指數法的分析而言,距河係距離對崩塌地的影響最大;而主成份分析法則以坡度對崩塌地的影響最大。 |
摘要(英) |
The
main purpose of the study was to utilize the Geographic
Information System (GIS) to develop a quantitative approach to
evaluate regional land-slide hazards in the mountainous areas
along the Chan-Yu-Lan Creek basin in central Taiwan. First, the
“dangerous value method DVM” was used to analyze the effects of
selected environmental factors for the development of land-slide
hazard map in compliance with various mapping techniques
suitable for the study area. According to the research data
collected, 5 environmental factors were selected (slope angle,
altitude, soil type, land-use, and river-distance) for the
study. A weighting system was designed and calculated to
represent the weight of each factor for evaluating the
land-slide hazards and to categorize the study area into various
hazard levels with respect to associated spatial distribution
patterns.
The study also introduced the “principle component method PCM”
in developing a rational approach for the regional land-slide
hazard analysis as to produce a comparable hazard map for the
study area. Results of the study indicated that the PCM exhibit
superior performance than DVM in analyzing and identifying the
high land-slide potential areas in the study area. Also, in
general, altitude, soil-type and river-distance are the most
critical factors in determining the hazards as revealed by the
study results. Specifically, the factor “river-distance” and
“slope angle” is the most influential factor as proven by the
DVM and PCM, respectively. |
關鍵字(中) |
不安定指數法
主成份分析法
GIS
山崩潛感
|
關鍵字(英) |
dangerous value method
principal component method
land-slide hazard
GIS
|
口試委員 |
紀子文 - 召集委員
蔡佩勳 - 委員
張子修 - 指導教授
|
口試日期 |
2007-07-13 |
繳交日期 |
2007-07-22 |