Rainfall can cause soil slopes to fail, especially in areas with high rainfall. The angle of the slope affects its stability during rain. A study looked at how slope angle impacts soil erosion during rainfall. They found that steeper slopes lead to more runoff, causing more erosion and the wetting front to rise. A new model was created to predict wetting front movement based on slope angle and water seepage. This research helps us understand how slope angle affects soil erosion during heavy rain.