## 3 Results and Discussion
### Slope Soil Water Dissipation-Related Factors Analysis  
In the vertical direction within the slope, changes in soil water are primarily influenced by soil properties, vegetation growth, and climatic factors [23; 24]. Soil water is particularly sensitive to climatic factors within the top 100 cm of the soil surface [25]. After the end of rainfall, the redistribution of soil water is mainly influenced by the combined effects of gravitational potential and matrix potential [26]. Soil water migrates from soil layers with high potential energy to those with low potential energy. Additionally, meteorological conditions such as temperature, humidity, wind speed, and solar radiation impact the rate at which water dissipates in the soil [27; 28]. Consequently, soil water content varies over time due to the interaction of multiple meteorological factors and slope conditions. To assess the relationship between meteorological factors (such as temperature, humidity, wind speed, solar radiation) and slope conditions (such as vegetation and slope ratio) with soil water, Table 3 was constructed using Pearson correlation analysis. Table 3 demonstrates an extremely significant correlation between soil water at each depth and the ratio of slope and vegetation (\(p<0.01\)). The presence of vegetation has a significant impact on soil water dissipation, particularly in deeper soil layers. The dissipation coefficients of vegetation on soil water at depths of 0-20 cm, 20-40 cm, 40-60 cm, 60-100 cm, and 0-100 cm are \(-0.155\), \(-0.431\), \(-0.419\), \(-0.481\), and \(-0.800\), respectively. The effect of slope ratio on the natural evaporation of soil layers at different depths varies. The dissipation coefficients of slope ratio on the water content of soil layers with depths of 0-20 cm, 20-40 cm, 40-60 cm, 60-100 cm, and 0-100 cm are 0.672, 0.551, \(-0.236\), 0.817, and 0.0688, respectively. Humidity and temperature have a negative correlation with soil water content, while wind speed has a positive correlation. However, solar radiation has little effect on soil water content (\(p>0.05\)). The rise in temperature accelerates water movement in the soil, leading to an increase in soil water dissipation capacity. Previous studies have \begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**Types of Slope**} & \multirow{2}{*}{**Ratio of Slope**} & \multirow{2}{*}{**Soil Depth/cm**} & \multicolumn{2}{c}{\(\Delta w\) = \(a\times\) In(\(\Delta t\)) + \(b\)} \\ \cline{3-6}  & & & \(a\) & \(b\) & \(\mathbf{R^{2}}\) \\ \hline \multirow{6}{*}{Vegetated Slope} & \multirow{2}{*}{1:1.5} & 20 & 2.162 & 3.065 & 0.980 \\  & & 40 & 1.279 & 1.813 & 0.965 \\  & & 60 & 0.663 & 0.913 & 0.944 \\ \cline{2-6}  & & 20 & 1.558 & 2.544 & 0.989 \\ \cline{1-1}  & & 40 & 1.106 & 2.056 & 0.996 \\ \cline{1-1}  & & 60 & 0.521 & 1.009 & 0.953 \\ \cline{1-1} \cline{2-6}  & & 20 & 1.099 & 2.414 & 0.965 \\ \cline{1-1}  & & 40 & 0.992 & 2.021 & 0.982 \\ \cline{1-1}  & & 60 & 0.548 & 1.132 & 0.974 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: _Cont._ \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Soil Depth**} & \multicolumn{2}{c}{**Meteorological Factors**} & \multicolumn{2}{c}{**Slope Conditions**} \\ \cline{2-6}  & **Wind Speed** & **Temperature** & **Humidity** & **Solar Radiation** & **Vegetation** & **Ratio of Slope** \\ \hline
0–20 cm & 0.0329 & \(-0.0507\) * & \(-0.05003\) * & \(-0.01484\) & \(-0.155\) ** & \(-0.672\) ** \\
20–40 cm & 0.0882 ** & \(-0.0516\) * & \(-0.0368\) & \(-0.01995\) & \(-0.431\) ** & 0.551 ** \\
40–60 cm & \(-0.00554\) & \(-0.0306\) & \(-0.0272\) & \(0.00244\) & \(-0.419\) ** & \(-0.236\) ** \\
60–100 cm & 0.043 & \(-0.0321\) & \(-0.0255\) & \(-0.01236\) & \(-0.481\) ** & 0.817 ** \\
0–100 cm & 0.0202 & \(-0.0468\) * & \(-0.0445\) * & \(-0.00629\) & \(-0.800\) ** & 0.0688 ** \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Pearson correlation coefficient of meteorological and environmental factors with the soil water content of different soil layers.