| Summary: | 碩士 === 國立中興大學 === 水土保持學系所 === 103 === Slope stability is affected by groundwater pressure, of which the distribution is associated with the properties of geomaterials, the thickness of the colluvium or weathered layer, permeability anisotropy. This study aims at the effects of permeability isotropy and anisotropy with the change of parameters and the thickness of materials on the distribution of groundwater. With the permeability anisotropy of cleavage and changing the hydraulic conductivity, the groundwater levels of oblique, dip, and anaclinal slopes are compared under the same rainfall amount. Furthermore, comparing the bowl-shaped bed rock and the thickness of the colluvium or weathered layer, whether affecting groundwater levels and the distribution of groundwater pressure. The software FEMWATER was used to establish the hydro-geological model of an unstable slope at Lushan. The thinner the colluvium or weathered layer is, the higher the groundwater rises. And the bigger the hydraulic conductivity is,the more obvious the difference of oblique, dip, and anaclinal slopes is. Besides, under the rainfall of typhoon Morakot, the rises of groundwater from the highest to lowest appear in the anaclinal, oblique, and dip slopes.
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