*6.2. Thickness Analysis of the Accumulation Body*

As shown in Figure 8, when the landslide sheared and started at X = 140 m, the initial volume of the landslide was 5.62 <sup>×</sup> 10<sup>4</sup> m3, and the average thickness of the sliding body in the sliding source area was 4.5–5 m. After sliding for 7 s, it reached X = 200 m. Due to the scraping effect, the landslide volume reached 13.3 <sup>×</sup> <sup>10</sup><sup>4</sup> m3, and the thickness of the accumulation body reached 5 m. At 10 s, the sliding body moved forward to the slope toe, X = 250 m, and the volume of the sliding body reached 23.4 <sup>×</sup> 104 m3. At 15.82 s, the sliding body moved to the opposite side of the slope, at X = 350 m, and the volume of the sliding body reached 27.7 <sup>×</sup> 104 m3. Finally, at 22 s, the sliding

body stopped moving, and the final total volume reached 32 <sup>×</sup> <sup>10</sup><sup>4</sup> <sup>m</sup>3. The maximum thickness of the accumulation body at X = 255 m reached 6 m, and the average thickness of the accumulation body reached 0.2–1 m in the sliding source area, 1–2 m in the debris flow area, and 5–6 m in the accumulation area. The simulated results were less than the actual measured results because the dynamic model stretched a smooth two dimensional plane into three dimensions (Figure 6).

**Figure 7.** Variation of speed versus sliding range.

**Figure 8.** Variation of the thickness of the accumulation body at different times.
