滲流破壞可能引發地質災害，如地面塌陷、滑坡等。研究滲流破壞有助於了解災害的形成機制和發展規律，開發和應用數值模擬工具，以模擬邊坡滲流破壞的過程，評估不同因素對邊坡穩定性的影響，從而採取適當的防治措施，不論是減少災害發生和影響，或是提高工程的安全性都很有幫助。本研究主要利用Hele Shaw Model模擬有坡度的飽和含水土層的水位變化情形，用洗潔精及矽油在不同的溫度、坡度及不同水頭高的條件下進行實驗，在實驗中加入鋁粉觀察流速隨位置變化情形。經由實驗觀察並紀錄自由水面高度、流量及時間等相關物理量，以洗潔精在不同溫度條件下比較不同水力傳導係數對流況的影響，用矽油針對水頭高以及坡度因子對自由水面及流量之影響作探討，分析水頭高度和坡度因子對自由水面形態的影響，最後將實驗結果與理論公式進行比較。

Seepage may cause geological disasters, such as ground subsidence and landslides. The study of seepage is of help to understand the failure mechanism and the countermeasures of seepage-induced disasters. This study mainly adopts the Hele Shaw Model to explore the seepage characteristics with different slope. Both commercial detergent and silicone oil were used to conduct experiments under different conditions of temperature, slope, and upstream water depths. Aluminum powder was used to traced the velocities at different locations, and the velocity profiles agrees well with theoretical prediction. Both transient and steady seepage surface were analyzed by using both detergent and silicone oil. Dimensionless forms of steady discharge and the transient advancing seepage front as a function of aspect ratio, slope and hydraulic conductivity are proposed based on conceptual models, and the results agrees well with experimental data.

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