Catastrophic ice-debris flow in the Rishiganga River, Chamoli, Uttarakhand (India)
نویسندگان
چکیده
A catastrophic flood occurred on 7 February 2021 around 10:30 AM (local time) in the Rishiganga River, which has been attributed to a rockslide upper reach of Raunthi River. The Resourcesat 2 LISS IV (8 2021) and CNES Airbus satellite imagery (9 clearly show location displaced materials. solar radiation observed was higher than normal by 10% 25% 6 2021, respectively, however, temperature shows up 34% changes. These conditions are responsible for sudden change instability glacier blocks causing deadly rock-ice slides that led collapse hanging as wedge failure. materials mixed with ice, snow, debris caused floods downstream within no time destroyed critical infrastructure killed human lives. hydrodynamic modelling (HEC-RAS software) mean flow velocity 22.4 ± 8.6 m/s an average depth 16.3 6.5 m devastation source region along rivers due water valley.
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ژورنال
عنوان ژورنال: Geomatics, Natural Hazards and Risk
سال: 2022
ISSN: ['1947-5705', '1947-5713']
DOI: https://doi.org/10.1080/19475705.2021.2023661