集水區坡地安定評估之計量分析方法

Quantitative Assessment of Hillslope Stability in a Watershed

蘇苗彬(Miau-Bin Su) ； 蔡顯修(Hsien-Shiow Tsai) ； 簡李濱(Li-Bin Jien)

《中華水土保持學報》 29卷2期 (1998/06) Pp. 105-114

https://doi.org/10.29417/JCSWC.199806_29(2).0003

摘要

對大區域之山坡地邊坡進行安定性評估，是山坡地整體開發規劃中一項基礎性的工作。本研究在應用地理資訊系統之技術，建立一套用來評估區域性坡地安定的計量分析方法。選定苗栗縣鯉魚潭水庫大壩上游集水區爲本研究之地區，建立地理環境資料庫。分析求得資料庫中有關地形，地質及特殊空間位置分佈等資料。評估作業中不以評估準則作分類，而是利用各因子內分類等級對各類型災害崩塌個數之資料統計分佈情形，並提出以相對量化分級之方法求出各等級之計量值及因子間的權重値。並考量不同災害類型的影響，以評定坡地的整體安定性與可能發生之災害類型。在此系統下以不同災害類型之因子組合來評估坡地時，除可決定坡地安定性外，亦可對可能發生之災害類型進行預測，有助於地區整體的開發規劃與山崩災害的防治。

關鍵字

地理資訊系統 ； 計量方法 ； 坡地安定評估

並列摘要

The objective of the present study is to build a quantitative analysis method for the assessment of local hillslope stability using the GIS technology. The method developed is based on estimating the relative dangerous degree of slopes. The factors and its weighing function are determined for each type of failure based on field investigation for different types of slope failure. Wherein, Li-Yu-Tan reservoir basin was selected as the study site. Prediction were made using regressed result which were well compared with the records of landslide in situ. It is proved that by using GIS technology for assessing the stability of hillside slope offers an operational environment which is helpful for investigation of slopeland resources106 and in planning of land use for large area of slopeland.

並列關鍵字

GIS ； quantitative assessment ； hillslope stability