Japan Geoscience Union Meeting 2021

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[J] Oral

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS23] Mountain Science

Fri. Jun 4, 2021 9:00 AM - 10:30 AM Ch.13 (Zoom Room 13)

convener:Keisuke Suzuki(Research Center for Mountain Environment, Shinshu University), Yoshihiko Kariya(Department of Environmental Geography, Senshu University), Akihiko SASAKI(Department of Geography and Environmental Studies, Kokushikan University), Chiyuki Narama(Niigata University, Program of Field Research in the Environmental Sciences), Chairperson:Kenshiro Arie(Niigata University)

9:45 AM - 10:00 AM

[MIS23-04] Large-scale flood in North India on 7 February 2021.

*Chiyuki Narama1, Naho Yamada2 (1.Niigata University, Program of Field Research in the Environmental Sciences, 2.Graduate School of Science and Technology, Niigata University)

Keywords:ice avalanche, rock slope failure, flood, Indian Himalaya

A large-scale flood occurred in Uttarakhand, North India, around 10:30 local time on February 7, 2021. About 170 or more missing workers and 38 people were confirmed dead at the Tapovan Vishnugad Hydro Power Plant, and structures such as houses, dams, hydroelectric power plants, and bridges were damaged. The flood occurred upstream of the Rishiganga River, then merged with the Dhauliganga River and passed through the Raini Village (2000 m asl) in the Chamoli District and the Topoban Vishnugad Hydro Power Plant (1800 m asl) located downstream. As the causes of the flood, we confirmed the collapse of rock slope and small hanging glacier, based on the satellite images before and after the flood.