https://scholars.lib.ntu.edu.tw/handle/123456789/85792
Title: | 土石流災害防治之研究(以南投示範區陳有蘭溪為對象)─子計畫:土石流發生危險度即時分析及評估系統 | Authors: | 范正成 | Issue Date: | 1999 | Publisher: | 臺北市:國立臺灣大學生物環境系統工程學系暨研究所 | Abstract: | 本研究以南投縣境內土石流發生區 為主要研究對象,提出土石流發生臨界降 雨線之設定方法,且針對南投縣內三十個 危險溪流樣本,進行土石流發生危險因子 之檢定分析。研究結果顯示土地利用因 子、溪床平均坡度及土壤粒徑大於四號篩 百分比等三項因子與土石流發生關係較為 密切。另由曾發生土石流的十三個溪流樣 本,配合通過檢定的危險因子,進行三維 費雪區別函數分析,建立土石流發生臨界 降雨線之預測公式,亦藉以推測未發生土石流集水區之臨界降雨線。 The sites for this study were selected at the places where debris flows had ever occurred in the Prefecture of Nan-tou. In this study, a method for determining the critical rainfall line of debris flow occurrence was proposed. Thirty high potential streams of debris flow in the Prefecture of Nan-tou were used as samples. Then, dangerous factors affecting the occurrence of debris flow were examined and analyzed. The results showed that the land use factor, average slope steepness of the stream and the percentage of soil particles greater than sieve No.4 were relatively highly related to the occurrence of debris flow. In addition to this, three dimensional Fisher’s linear discriminant function was conducted using the dangerous factors (which passed the examination) of the 13 streams in which debris flows had ever occurred to establish the equations for evaluating the critical rainfall line of debris flow occurrence. Using the equations, the critical rainfall lines of the watersheds in which debris flow had never occurred could also be evaluated too. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/10682 | Other Identifiers: | 882625Z002044 | Rights: | 國立臺灣大學生物環境系統工程學系暨研究所 |
Appears in Collections: | 生物環境系統工程學系 |
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882625Z002044.pdf | 514.48 kB | Adobe PDF | View/Open |
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