Abstract:In this study, soil saturated hydraulic conductivity (Ks), capillary porosity, total porosity, water content, bulk density, particle composition, organic matter content and other basic physical properties were measured in different vertical and horizontal directions of three typical slopes in Taihang Mountain, and correlation analysis was used to study the profile distribution of Ks and other soil properties. At the same time, the vertical distribution of Ks anisotropy ratio and its causes were discussed. The results showed that Ks in the upper and lower slopes increased first and then decreased with the increase of soil depth in both vertical and horizontal directions. Ks in the middle slope increased first and then decreased with the increase of soil depth in the vertical direction, but decreased first and then increased with the increase of soil depth in the horizontal direction. Ksanisotropy ratio of the upper, middle and lower slopes were significantly different from that of 1, showing obvious anisotropy. Ks was dominant in the horizontal direction of the upper and lower slopes, while dominant in the vertical direction of the middle slope. Correlation analysis showed that Ksanisotropy ratio was negatively correlated with soil bulk density (r= -0.492, P=0.017), positively correlated with soil total porosity and capillary porosity (r= 0.546, P=0.007; r=0.543, P=0.007), while insignificantly correlated with other soil physiochemical properties, indicating that soil pore structure was the most important factor affecting Ks anisotropy ratio.