透過您的圖書館登入
IP:3.17.150.163
  • 學位論文

角埔溪土石流流動模擬研究

Numerical Simulation of Debris Flow in Jiaopu Creek

指導教授 : 詹錢登

摘要


本文使用FLO-2D數值模式,模擬角埔溪土石流流動。首先至現地進行溪床泥砂採樣,將泥砂帶回實驗室進行流變試驗,經由試驗得到體積濃度與流變參數的函式。本文利用一簡易模擬渠槽,研究各種不同的體積濃度、流變參數,對土石流流動之影響。 此外,本文探討當兩土石流支流交匯的情況下,對於土石流流動之影響。研究區域內的角埔溪集水區,上游有南側與北側兩個支流,本文假設上游的兩支流同時發生土石流,並進行模擬。結果顯示,在兩支流交匯處之流動深度,和無匯流者相比差異約達7 公尺,與災後資料相比,發現考慮匯流較符合災後的情形;本研究也模擬當角埔溪土石流匯入旗山溪河道產生的影響。由FLO-2D定床模擬假設下,其結果顯示,當支流角埔溪因流量小於主流旗山溪的流量,匯入後對於旗山溪水面最大的抬升量約為30 公分左右。

關鍵字

角埔溪 土石流 流變參數 匯流 FLO-2D

並列摘要


This paper uses the FLO-2D numerical model to simulate debris flow in the Jiaopu River. First, a field investigation is conducted to bring silt back to the laboratory for rheological tests, in order to get through the volume concentration and function of the rheological parameters. In this paper we also use a simple channel to study various volume concentrations and the rheological parameters of debris flow.   In addition, we investigate the phenomenon of two debris flow tributary confluence. Jiaopu River’s catchment within the study area has upper reaches of two tributaries to the south side and the north side. We assume that the two tributaries upstream debris flows occur at the same time. The results of simulation show that the difference in the two situations is approximately 7 meters. Compared with the post-disaster information, we find that the model which considers confluence to be more in line with post-disaster situations. This study also simulated when debris flow from the Jiaopu River flowed into the Chishan River. Under FLO-2D simulation of a fixed bed, the results show that when the tributaries Jiaopur River flow is less than the mainstream of the Chishan River, the impact to the Chishan River water surface is an uplift of about 30 centimeters.

參考文獻


49. 陳榮河、林美聆、陳宏宇(1993),「銅門村土石流材料特性之初步研究」,中華水土保持學報,第二十四卷第一期,頁65-73。
52. 張立憲(1985),「土石流特性之探討」,中華水土保持學報,第十六卷第一期,頁135-141。
56. 曾文孝、徐郁超、賴文基、詹錢登、謝正倫(2011),「土石流沖淤模式應用於小林村角埔溪災害模擬」,中華水土保持學報,第四十二卷第三期,頁219-227。
57. 曾國訓(2011),「羌黃坑溪土石流溢淹情境模擬分析」,國立成功大學水利及海洋工程學系碩士論文。
63. 趙啟宏(2004),「土石流之數值模擬及流變參數特性之探討」,國立台灣大學土木工程學系碩士論文。

延伸閱讀