Landslides and dammed lakes triggered by the 2017 Ms6.9 Milin earthquake in the Tsangpo gorge
An Ms6.9 earthquake in the Yarlung Tsangpo gorge on November 18, 2017 caused more than 700 landslides concentrating along the gorge’s great bend, and three dammed lakes. The location and area of the landslides are obtained by interpreting high-resolution satellite images before and after the earthquake. About 31.45 Mm3 of sediment from the landslides are distributed in seven catchments that are highly susceptible to debris flows. In 2018, at least three large-scale glacier-debris flows happened at Sedongpu, one of the seven catchments, and blocked temporarily the main river twice. The subsequent inundation and outburst floods resulted in infrastructure and property losses extensively beyond the high-seismic-intensity zone. Increase in the frequency of debris flows is attributed to the instability of glaciers and sediment supply caused by the earthquake. Glacier-debris flows will remain active for a long period due to massive glacial till, abundant rainfall, and meltwater. Geomorphic hazard chain triggered by such a mid-strong earthquake demonstrates that although coseismic landslides only occur in a limited area, the space and duration of the quake-induced hazards could extend largely under special geographical conditions.
KeywordsCoseismic landslides Dammed lakes Outburst flood Debris flow Milin earthquake
This work has been supported by the National Natural Science Foundation of China (Grant No.91747207 and 41790434) and the Research and Demonstration Program of Precise Warning and Emergence Disposal Technologies against geo-hazards in Jiuzhaigou scenic area (Grant No.KJ-2018-23).
- Chai HJ, Liu HC, Zhang ZY (1995) Landslide dams induced by Diexi earthquake in 1933 and its environmental effect. J Geol Hazard Environ Preserv 6(1):7–17 (in Chinese)Google Scholar
- Cui P, Zhu Y, Han Y, Chen XQ, Zhuang JQ (2009) The 12 May Wenchuan earthquake-induced landslide lakes: distribution and preliminary risk evaluation. Landslides 6(3):209–223. https://doi.org/10.1007/s10346-009-0160-9
- Hu K, Chen X, Ge Y, Jiang X, Wang Y (2017) Landslides triggered by the Ms6.5 Ludian, China earthquake of August 3, 2014. In: Mikoš M, Casagli N, Yin Y, Sassa K (eds) Advancing culture of living with landslides. WLF 2017. Springer, ChamGoogle Scholar
- Hu K, Zhang X, Tang J, Liu W (2018) Potential danger of dammed lakes induced by the 2017 Ms6.9 Milin earthquake in the Tsangpo gorge. 5th International Conference Debris Flows: Disasters, Risk, Forecast, Protection, pp 97–104Google Scholar
- Huang R, Li WL (2008) Research on development and distribution rules of geohazards induced by Wenchuan earthquake induced by Wenchuan earthquake on 12th May, 2008. Chin J Rock Mech Eng 27(12):2585–2592Google Scholar
- Kargel JS, Leonard GJ, Shugar DH, Haritashya UK, Bevington A, Fielding EJ, Fujita K, Geertsema M, Miles ES, Steiner J, Anderson E, Bajracharya S, Bawden GW, Breashears DF, Byers A, Collins B, Dhital MR, Donnellan A, Evans TL, Geai ML, Glasscoe MT, Green D, Gurung DR, Heijenk R, Hilborn A, Hudnut K, Huyck C, Immerzeel WW, Liming J, Jibson R, Kaab A, Khanal NR, Kirschbaum D, Kraaijenbrink PDA, Lamsal D, Shiyin L, Mingyang L, McKinney D, Nahirnick NK, Zhuotong N, Ojha S, Olsenholler J, Painter TH, Pleasants M, Pratima KC, Yuan QI, Raup BH, Regmi D, Rounce DR, Sakai A, Donghui S, Shea JM, Shrestha AB, Shukla A, Stumm D, van der Kooij M, Voss K, Xin W, Weihs B, Wolfe D, Lizong W, Xiaojun Y, Yoder MR, Young N (2016) Geomorphic and geologic controls of geohazards induced by Nepal’s 2015 Gorkha earthquake. Science 351(6269):aac8353CrossRefGoogle Scholar
- Xin HB, Wang YQ (1999) Criteria for earthquake-induced landslide and avalanche. Chin J Geotech Eng 21(5):591–594 (in Chinese)Google Scholar
- Xu GQ, Cai ZF, Zhang ZM, Li HQ, Chen FY, Tang ZM (2008) Tectonics and fabric kinematics of the Namche Barwa terrane, Eastern Himalayan Syntaxis. Acta Petrol Sin 24(7):1463–1476 (in Chinese)Google Scholar
- Yin A, Harrison TM (2003) Geologic evolution of the Himalayan-Tibetan orogen. Annu Rev Earth Planet Sci 28(28):211–280Google Scholar
- Yin FL, Han LB, Jiang CS, Shi YL (2018) Interaction between the 2017 M6.9 Mainling earthquake and the 1950 M8.6 Zayu earthquake and their impacts on surrounding major active faults. Chin J Geophys 61(8):3185-3197 (in Chinese)Google Scholar
- Zhang WJ (1985) Some features of the surge glacier in the Mt. Namcha Barwa. Mt Res 3(4):234–238 (in Chinese)Google Scholar
- Zhang ZG, Liu YH, Wang TW (1992) Geology of Namcha Barwa areas. Science Press, Beijing (in Chinese)Google Scholar