英文篇名
RISK ASSESSMENT AND DISASTER MANAGEMENT FOR DEBRIS-FLOW HAZARD ZONES
作者
陳樹群、馮智偉、吳俊毅、黃柏璁、王价巨
關鍵字
風險評估、危害度評估、易致災性分析、承受度評估、風險地圖
摘要
本文研究土石流潛勢溪流風險評估之方法。土石流風險評估包含土石流危害度評估、易致災性分析及承受度評估等三部分。危害度評估可藉由蝕溝密度、坡面15度以上之集水區面積、集水區高差、崩塌面積比及主流長度等因子來評估;易致災性部分則以土地利用類別來評估遭受危害時可能造成之相對損失;承受度方面則藉由問卷設計、隨機訪談的方式,試圖就居民防災意識素養評估其對於土石流危害的承受度,期使能呈現出該地承受度分布狀況。綜合以上三者後再輔以ArcView軟體,分析並呈現出該地之風險地圖,可做為風險管理決策之參考。因此,本研究即依循風險評估之架構,分別介紹土石流危害度評估、易致災性分析以及承受度評估之方法,藉由台中縣和平鄉博愛村之案例藉以說明土石流風險評估之方法。
英文摘要
The purpose of this paper is to establish a method for assessing the risk of debris flow hazard-prone streams. Debris flow risk assessment comprises hazard assessment, vulnerability analysis and capacity assessment. Firstly, hazard assessment can be estimated from gully density, basin areas with slope larger than 15 degree, basin relief, landslide ratio and mainstream length. For the vulnerability analysis, this research estimates the possible loss based on the type of land use. In order to assess the capacity of a community, the questionnaires and interviews of the residents were processed randomly in the hazard-prone areas to learn the way they cope with debris flow hazards. Finally, for the references of decision-making for risk management, the risk maps were producing by ArcView GIS software. In addition, a village, Bo-Ai in Taichung Counties was taken as examples to explain the analysis procedure.