查詢結果分析
來源資料
頁籤選單縮合
題 名 | 臺灣北部地區潛勢土石流現場調查與分析=Field Investigation and Analysis of Potential Debris Flow in North of Taiwan |
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作 者 | 張東炯; | 書刊名 | 農業工程學報 |
卷 期 | 44:3 1998.09[民87.09] |
頁 次 | 頁51-63 |
分類號 | 434.273 |
關鍵詞 | 潛勢土石流; 現場調查; Potential debris flow; Field investigation; |
語 文 | 中文(Chinese) |
中文摘要 | 本文之目的係由現場調查與分析,研究本省北部地區,包括臺北縣、市及基隆市 、桃園縣、新竹縣三個地區之潛勢土石流及其特性。 先進行此縣市內之土石流危險溪流現場調查,經確認臺北縣、市及基隆市共有60條、桃 園縣有18條、新竹縣則有13條,此三縣市共計有91條曾經有土石流發生過。而危險溪流之地 形特性經分析後統計,溪流坡度大部份分佈於10度至25度之間,佔總數之82%,溪流長度集 中於500公尺至1500公尺之間,佔總數之69%,另外集水面積則以10至180公頃之間,佔總數 之 92%。 其次,就降雨與土石流發生間之關係進行分析,得知在本研究調查區曾發生土石流之暴 雨中,而以18mm/hr為其下限值,但皆小於其5年頻率年降雨量56.8mm/hr。 最後,將土石流之土砂流出量與集水區之地形因子作一分析,同時推估本研究區域土石 流在溪床上通過所造之侵蝕深度約在0.3m∼1.6m之間。 |
英文摘要 | This paper presents the study of the potential debris flow in the Taipei, Keelung, Hsinchu and Taoyuan counties through both field investigation and analysis. Field investigation on streams with high potentials for the debris flow to happen in these counties is conducted first. As a result, a total of 91 streams are found to have experienced of the debris flow in the past. Analyzing the geographical characteristics of these streams, it is interesting to find that most of the slopes about 82 percent are between 10 to 25 degree. almost 69 percent of the streams have the length from 500 to 1500 meters, and 92 percent of watershed area between 10 to 180 hectares. The relationship between the precipitation and debris flow was analyzed. During the happened of debris flow in past, the minimum intensify is 18 mm/hr, the range lays below the area precipitation record 56.8mm/hr with return period of 5 years. Finally, the quantity of the debris is connected to the size of watershed area. And the erosion depths on the stream bed are estimated to be 0.3m to 1.6m. |
本系統中英文摘要資訊取自各篇刊載內容。