Geo-structures and deformation-failure characteristics of rockslide areas near the Baige landslide scar in the Jinsha River tectonic suture zone

Zhang, Shilin; Yin, Yueping; Hu, Xiewen; Wang, Wenpei; Li, Zong-Liang; Wu, Xinming; Luo, Gang; Zhu, Sainan

doi:10.1007/s10346-021-01741-2

Cited by 12 publications

(1 citation statement)

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“…With the dam break, the river discharge increased to 10000 m 3 s -1 and 31000 m 3 s -1 respectively. The outburst flood reached 670 km downstream, with roads, houses, farms, and bridges damaged; for example 18 bridges were affected and collapsed (Zhang et al 2021;. Fortunately, the two floods events did not induce casualties because of sufficient time between breaches and inundation for warnings to be issued.…”

Section: Introductionmentioning

confidence: 99%

Primary and potential secondary risks of landslide outburst floods

Gao

Lee

Deng

et al. 2022

Preprint

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Outburst floods triggered by breaching of landslide dams may cause severe loss of life and property downstream. Accurate identification and assessment of such floods, especially when they leading to secondary impacts, is critical. In 2018, the Baige landslide in the Tibetan Plateau twice blocked the Jinsha River, eventually resulting in a severe outburst flood. The Baige landslide remains active and it is possible that a breach happens again. Based on numerical simulation using a hydrodynamic model, remote sensing, and field investigation, we reproduce the outburst flood process and assess the hazard associated with future floods. The results show that the hydrodynamic model could accurately simulate the outburst flood process, with overall accuracy and kappa accuracy for the flood extent of 0.956 and 0.911. Three future dam break scenarios were considered with landslide dams of heights 30m, 35m, and 51m. The potential storage capacity / back-flow reaches 142x106m3/32km, 182x106m3/40km, and 331x106m3/50km in the valley upstream. Failure of these three dams leads to maximum inundation in the downstream of study reach of 1.674 km2, 1.833 km2, and 1.927 km2. These results demonstrate the serious secondary hazard associated with this region.

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Section: Introductionmentioning

confidence: 99%