Investigation of deposition characteristics using a novel super-resolution method: a case study of Baiyan rock avalanche in Guizhou, China.
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| Title: | Investigation of deposition characteristics using a novel super-resolution method: a case study of Baiyan rock avalanche in Guizhou, China. |
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| Authors: | He, Junyi1 (AUTHOR), Zhang, Yufang2 (AUTHOR) zhangyufangreri@126.com, Sun, Peijun1 (AUTHOR), Zhu, Kaiyue1 (AUTHOR), Sun, Jiafu1 (AUTHOR), Jin, Kaiping1 (AUTHOR) |
| Source: | Landslides. Aug2025, Vol. 22 Issue 8, p2659-2676. 18p. |
| Subjects: | Rockslides, Particle analysis, Artificial intelligence, Rainfall, Motion analysis |
| Abstract: | On May 8, 2022, a catastrophic rock slide occurred in Jinsha County, Guizhou, China. It claimed three fatalities and caused half of the Baiyan Village destroyed. The entire movement process of Baiyan rock avalanche was affected by the terrain and correspondingly deposited under the influence of two ridges in deposition area and entrainment area, respectively. Detailed field investigation and uncrewed aerial vehicle (UAV) survey were conducted, and a collaborate effect of mining activities, rainfall, and developed cracks triggered the slope failure. A novel super-resolution method (SRM) based on artificial intelligence (AI) was applied on the particle analysis along the motion of Baiyan rock avalanche. This method is performed and validated to obtain a high accuracy of the particle distribution including number of particles (np), maximum diameter (dmax), and median size (d50). Deposition characteristics are found along the movement directions: (1) np exhibits a bimodal variation with two peak values located at 15–35 m and 105–125 m in the entrainment area. Three peak values are observed in the deposition area, positioned at 170–250 m, 310–350 m, and 410–430 m, respectively. (2) The distribution of dmax is similar to np, with the first peak value appearing at 15–45 m and the second peak value at 115–125 m in the entrainment area. In the deposition area, peak values are observed at 90–130 m, 210–230 m, and 370–450 m. The considerable differences in locations of peak value within subzones may be attributed to the greater randomness in the distribution of larger blocks. (3) The value of d50 shows a single modal and reaches maximum on the location of the ridge, ranging from 0.3 to 0.35 m in both the entrainment and deposition areas. Compared to dmax, this indicates that smaller blocks took the major portion after the rock avalanche. (4) The presence of the ridge leads to a decrease in np and dmax while increasing d50 to its peak. It is hypothesized that this topography effect may hinder the movement of smaller particles, causing larger particles to accumulate on the slope of the ridge. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | On May 8, 2022, a catastrophic rock slide occurred in Jinsha County, Guizhou, China. It claimed three fatalities and caused half of the Baiyan Village destroyed. The entire movement process of Baiyan rock avalanche was affected by the terrain and correspondingly deposited under the influence of two ridges in deposition area and entrainment area, respectively. Detailed field investigation and uncrewed aerial vehicle (UAV) survey were conducted, and a collaborate effect of mining activities, rainfall, and developed cracks triggered the slope failure. A novel super-resolution method (SRM) based on artificial intelligence (AI) was applied on the particle analysis along the motion of Baiyan rock avalanche. This method is performed and validated to obtain a high accuracy of the particle distribution including number of particles (np), maximum diameter (dmax), and median size (d50). Deposition characteristics are found along the movement directions: (1) np exhibits a bimodal variation with two peak values located at 15–35 m and 105–125 m in the entrainment area. Three peak values are observed in the deposition area, positioned at 170–250 m, 310–350 m, and 410–430 m, respectively. (2) The distribution of dmax is similar to np, with the first peak value appearing at 15–45 m and the second peak value at 115–125 m in the entrainment area. In the deposition area, peak values are observed at 90–130 m, 210–230 m, and 370–450 m. The considerable differences in locations of peak value within subzones may be attributed to the greater randomness in the distribution of larger blocks. (3) The value of d50 shows a single modal and reaches maximum on the location of the ridge, ranging from 0.3 to 0.35 m in both the entrainment and deposition areas. Compared to dmax, this indicates that smaller blocks took the major portion after the rock avalanche. (4) The presence of the ridge leads to a decrease in np and dmax while increasing d50 to its peak. It is hypothesized that this topography effect may hinder the movement of smaller particles, causing larger particles to accumulate on the slope of the ridge. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 1612510X |
| DOI: | 10.1007/s10346-025-02512-z |
