應用不安定指數法於坡地崩塌之潛勢分析

Application of Instability Index Method to Analyze the Potential of Slope Collapse

蘇苗彬(Miau-Bin Su) ； 陳毅輝(I-Hui Chen) ； 方俊傑(Jun-Jie Fang)

《水保技術》 4卷1期 (2009/01) Pp. 9-23

https://doi.org/10.30040/JSWCT.200901.0002

摘要

本研究應用地理資訊系統(GIS)之技術，配合不安定指數法之概念，建立一套評估區域性坡地安定之計量分析方法。透過GIS進行危險潛感地圖製作，針對已發生災害事件的空間特徵，利用不安定指數法推論以往造成崩塌災害發生的環境變數之關鍵因子進行分析。對崩塌範圍進行統計分析及權重計算前，深入探討崩塌地崩壞之主因，找出造成各類崩塌之主要崩塌類型。再針對主要崩塌類型，根據前後期整體研究之結果，驗證崩塌因子權重與主要崩塌類型相關性，以少數關鍵崩塌影響因子，評定出崩塌潛感區之等級及空間分佈情況。

關鍵字

地理資訊系統 ； 不安定指數法 ； 危險潛感地圖

並列摘要

The purpose of this research is to use the technology of the geographic information system (GIS) and instability index method and set up quantitative method of landslide potential hazard. It is applied to make cartographic model by GIS. First, cartographic model for different states with suitable construction and landslide susceptibility map are made by analyzing and setting the key environmental factors for hazard sites. Instability index method infers the key environmental factors that lead to landslide events in the past, and which were graded and weighted individually at the same time. Furthermore, it is estimated the range and space distribution situation of landslide susceptibility area by the GIS cartographic modeling. This research classified the phenomenon of landslide before statistical analysis and calculating weight. According to the results to verify the relationship between the factor weight and the main landslide type, less key environmental factors were estimated to set up the range and space distribution situation of landslide susceptibility area.

並列關鍵字

Geographical information system ； Instability index method ； Risk susceptibility map