## 4 Results
### Association Rules Mining
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Rule ID** & **Antecedent Items** & **Consequent Items** & **Support \(\prime\)\%** & **Confidence/\%** & **Lift** \\ \hline \multirow{4}{*}{1} & \(\overline{R}\) = Medium-Water-Level, \(\Delta R\) = Slowly Rise, & & & & \\  & \(\sum\!\!q^{\text{month}}=\) Heavy-Rainfall, \(q^{day}_{\text{max}}=\) Heavy & & 6.6 & 100 & 2.65 \\  & Daily Rainfall, \(D\) (P5)= Low, \(D\) (P7) = Low & & & & \\
2 & \(\overline{R}=\) Medium-Water-Level, \(q^{day}_{\text{max}}=\) Light & & 8.2 & 83.3 & 2.21 \\  & Daily Rainfall, \(D\) (P5) = Low & & & & \\  & \(\overline{R}=\) High-Water-Level, & & & & \\
3 & \(\Delta R=\) Stable-Fluctuation, & & 6.6 & 66.7 & 1.77 \\  & \(\sum\!\!q^{\text{month}}=\) Light-Rainfall, \(D\) (P5) = Low & & & & \\  & \(\overline{R}=\) High-Water-Level, \(\Delta R\) = Slowly Rise, & & & & \\
4 & \(\sum\!\!q^{\text{month}}=\) Moderate-Rainfall, & & 6.6 & 66.7 & 1.77 \\  & \(q^{day}_{\text{max}}=\) Moderate Daily Rainfall & & & & \\ \hline \multirow{4}{*}{5} & \(\overline{R}=\) Medium-Water-Level, \(\Delta R\) = Sharply & & & & \\  & Drop, \(\sum\!\!q^{\text{month}}=\) Light-Rainfall, & & & & \\  & \(q^{day}_{\text{max}}=\) Moderate Daily Rainfall, & & & & \\  & \(D\) (P7) = Medium & \(D\) = Medium & & & \\  & \(\overline{R}=\) Medium-Water-Level, \(q^{day}_{\text{max}}=\)Light & & & & \\
6 & Daily Rainfall, \(D\) (P5) = Medium, & & & & \\  & \(D\) (P7) = Medium & & 6.6 & 80 & 1.53 \\
7 & \(\overline{R}=\) Low-Water-Level, \(\Delta R\) = Slowly Drop & & 6.6 & 80 & 1.53 \\ \hline \multirow{4}{*}{8} & \(\overline{R}=\) Low-Water-Level, & & & & \\  & \(\Delta R=\) Slowly Drop, \(q^{day}_{\text{max}}=\) Light Daily & & 6.6 & 82.5 & 6.78 \\  & Rainfall, \(D\) (P7) = Low & & & & \\
9 & \(\sum\!\!q^{\text{month}}=\) Light-Rainfall, \(D\) (P5) = Low, & \(D\) = High & 6.6 & 66.7 & 6.78 \\  & \(D\) (P7) = Low & & & & \\  & \(\overline{R}=\) Low-Water-Level, & & & & \\  & \(\Delta R=\) Stable-Fluctuation, & & & & \\  & \(\sum\!\!q^{\text{month}}=\) Light-Rainfall, \(q^{day}_{\text{max}}=\) Light Daily & & 6.6 & 66.7 & 6.78 \\  & Rainfall, \(D\) (P7) = Low & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Association rules of P2 monitoring point. level is the primary factor regulating deformation rates. Rules 7 and 8 are associated with low reservoir water levels, sharply declining water level variation, and moderate-to-heavy rainfall. These rules suggest that the significant deformation in the middle of the landslide results from the combined effects of reservoir water level and rainfall. Table 4 presents the results of the association rule for P7. In Rules 1-3, the reservoir water level is medium to high, with both monthly cumulative rainfall and maximum daily rainfall being light. Rule 3 indicates that when the reservoir water level is high, even if it undergoes a slow decline, it does not significantly affect deformation at the rear of the landslide. Rules 4-6 involve medium and slowly declining reservoir water levels, clearly indicating that a gradual decline in water level accelerates deformation at the rear of the landslide under medium-to-low reservoir water levels. Compared to Rules 7-9 with the association rules for middle-to-low levels deformation, it is evident that as the reservoir water level continues to drop to low, the influence of rainfall on landslide deformation becomes increasingly prominent. All rules indicate that when significant deformation occurs, the landslide is under conditions of low and sharply declining reservoir water levels, as well as conditions of moderate-to-heavy rainfall, with both reservoir water levels and rainfall jointly regulating rapid deformation at the rear part. Additionally, the high-level deformation phase at the rear section is strongly consistent with that at the middle, but it differs from the trend at the front, highlighting the spatial variability in the deformation mechanisms of the No.