- 期刊
地滑地降雨與地表移動之關係
The Relationship between Rainfall and Surface Displacement in Potential Landslide Area
摘要
引起邊坡崩塌之原因，除了受地形、地質、氣候、植被等自然因素之影響外，主要之誘因乃為人類之過度開發利用所致。要實施崩塌地之防治工作，除應積極進行必要之現場調查外，最重要者仍在於規劃設計完善之防治策略。對於崩塌災害一般可採用預防迴避對策與積極防治對策二類，例如近年來所實施的災害預警工作就是預防迴避對策方法之一，然因預測尚存有許多問題與不確定性，致今無法確切地掌握其破壞發生時刻，使得民眾仍無法進行即時避災減害。本文係以苗栗之大份田地滑地為例，利用其降雨、地下水位變化與地層滑動之相互關係，嘗試探求其警戒管理值。經調查分析得知，本地區於降雨後至地表移動之間隔時間約為二日；單場降雨累積雨量達45mm時，為地表移動量之注意值；而單場降雨累積雨量達52mm時，為地表移動量之警戒值。
並列摘要
Besides latent factors including topography, geology, climate and vegetation cover lead to collapse and landslide, the important factor is human over developed which lead to many landslides. Generally speaking, the most important thing is effective prevention planning except necessary investigation in landslide areas, and prevent landslide method have guard and cure. Recently there were many people died within the guard method which still have many problems for disaster warning and collapse mechanism control. The objects of this study tried to analysis and induct the relation of accumulated rainfall, groundwater table and surface displacement of slope sliding variation by the data of Da-Fun-Tain landslide in center of Taiwan. The results show that the surface displacement of slope sliding were closely with accumulated two day's rainfall after rainy. The warning rainfall was 45mm and the dangerous rainfall was 52mm which will make a suggestion for landslide disaster mitigation and management indication.