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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/72446

    Title: 台灣各子集水區之降雨與誘發山崩率之關係;The relationship between rainfall and the occurrence rate of induced landslides for sub-catchments in Taiwan
    Authors: 蔡心蘭;Tsai,Hsin-Lan
    Contributors: 應用地質研究所
    Keywords: 降雨誘發山崩;崩壞比;降雨門檻值;rainfall-induced landslides;landslide ratio;rainfall threshold
    Date: 2016-08-26
    Issue Date: 2016-10-13 14:56:19 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 本研究以前人降雨誘發山崩率之研究為基礎,於台灣各個流域內以水利署所劃分之子集水區為選取研究區之基準,分析降雨誘發山崩發生率與雨量因子之間的關係,探討崩壞比是否隨著雨量值改變呈某一趨勢之變化,並求得誘發山崩之降雨門檻值。
    ;Based on previous rainfall-induced landslide studies, this research analyzed the relationship between the occurrence rate of rainfall-induced landslides and a rainfall factor for several sub-catchments in Taiwan. To investigate how the landslide occurrence rate increases with rainfall depth, and whether there is a rainfall threshold for landslides.
    In each sub-catchment, first-order linear regression analysis indicates that evet total rainfall and the landslide ratio shows good relation with high value of R2. The landslide ratio increases linearly with rainfall after a certain threshold value. In the further quadratic regression, it shows that the performance is also good and the R2 value is high, when an extreme high rainfall event is involved. This means that the landslide occurrence rate has increased in an extreme rainfall event and a quadratic form would be more valid in describing it.
    The intercept of the regression line at the horizontal axis is defined as a rainfall threshold for landsliding. The threshold value is commonly larger after the linear regression than that after the quadratic regression. This is due to the concave nature of the quadratic regression line and lack of data near the intercept. If we have added more data near the intercept, the distance of two intercepts may become closer. This indicates that an idea threshold may locate between the threshold after linear regression and the threshold after quadratic regression.
    Appears in Collections:[應用地質研究所] 博碩士論文

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