## 5 Discussion  
To validate the accuracy of the association rule results, the monthly deformation velocities at P2, P5, and P7 were plotted against the reservoir water level elevation and the monthly reservoir fluctuation velocity (Figure 9). The \(x\)-axis represents the monthly reservoir fluctuation velocity, while the \(y\)-axis represents the monthly deformation velocity. The color grading of the scatter points indicates the reservoir water level elevation. The coordinate plane is divided into four regions based on the sign of the reservoir fluctuation velocity and the deformation level, specifically whether it is classified as high-level deformation. For instance, in Region A, the scatter points correspond to a declining reservoir water level and high-level deformation. The front, middle, and rear sections of the landslide are all significantly influenced by the elevation and fluctuation velocity of the reservoir water level. Notably, during periods of high-level landslide deformation, the scatter points are predominantly concentrated in Region A, which corresponds to a drop in the reservoir water level, typically associated with medium-to-low water levels. Conversely, during periods of high reservoir water levels or rising water levels, the landslide deformation velocity is markedly suppressed. This pattern is consistent with the association rule results related to reservoir water levels presented in Tables 2-4. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Rule ID** & **Antecedent Items** & **Consequent Items** & **Support /\%** & **Confidence/\%** & **Lift** \\ \hline \multirow{4}{*}{1} & \(\overline{R}\) = Medium-Water-Level, & & & & \\  & \(\Delta R\) = Stable-Fluctuation, & & & & \\  & \(\sum q^{\text{month}}\) = Light-Rainfall, \(q^{day}_{\text{max}}\) = Light Daily & & 6.6 & 100 & 1.91 \\  & Rainfall, \(D\) (P5) = Low & & & & \\  & \(\overline{R}\) = Medium-Water-Level, & & & & \\
2 & \(\sum q^{\text{month}}\) = Light-Rainfall, \(D\) (P5) = Low, & & 8.2 & 100 & 1.91 \\  & \(D\) (P7) = Low & & & & \\
3 & \(\overline{R}\) = High-Water-Level, \(\Delta R\) = Slowly Drop, & & & & \\  & \(\sum q^{\text{month}}\) = Light-Rainfall, \(D\) (P5) = Low & & & & \\ \hline \multirow{4}{*}{4} & \(\overline{R}\) = Medium-Water-Level, \(\Delta R\) = Slowly Drop, & & 6.6 & 100 & 3.21 \\  & \(\overline{R}\) = Medium-Water-Level, & & & & \\
5 & \(\Delta R\) = Slowly Drop, \(q^{day}_{\text{max}}\) = Light Daily & & 6.6 & 100 & 3.21 \\  & Rainfall, \(D\) (P5) = Medium & & & & \\  & \(\Delta R\) = Slowly Drop, & & & & \\
6 & \(\sum q^{\text{month}}\) = Light-Rainfall, \(q^{day}_{\text{max}}\) = Light Daily & & 11.5 & 87.5 & 2.81 \\  & Rainfall, \(D\) (P2) = Medium & & & & \\ \hline \multirow{4}{*}{7} & \(\overline{R}\) = Low-Water-Level, \(\Delta R\) = Sharply Drop, & & 6.6 & 80 & 4.88 \\  & \(\sum q^{\text{month}}\) = Moderate-Rainfall, \(D\) (P5) = High & & & & \\
8 & \(\overline{R}\) = Low-Water-Level, \(\Delta R\) = Sharply Drop, & & & & \\  & \(\sum q^{\text{month}}\) = Heavy-Rainfall, \(D\) (P2) = Low & & & & \\  & \(\overline{R}\) = Low-Water-Level, & & & & \\
9 & \(\Delta R\) = Sharply Drop, \(q^{day}_{\text{max}}\) = Heavy Daily & & & & \\  & Rainfall, \(D\) (P2) = Medium & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Association rules of P7 monitoring point. Figure 9: Relationship of monthly deformation velocity at monitoring points in **(a)** P2, **(b)** P5, and **(c)** P7 with reservoir fluctuation velocity and water level. Figure 10 illustrates the relationship between deformation velocity, reservoir water level, and monthly cumulative rainfall. The coordinate plane is divided into four regions based on the signs of reservoir fluctuation velocity and rainfall intensity (whether it is moderate-to-heavy rainfall). During high-level deformation, the scatter points of P2 are exclusively concentrated in Region A, indicating that the intensification of landslide deformation is largely independent of moderate-to-heavy rainfall.