2021
DOI: 10.24018/ejgeo.2021.2.4.170
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Investigating the 7th February, 2021 Landslide Triggered Flash Flood in the Himalayan Region Using Geospatial Techniques

Abstract: On 7th February 2021 just before noon, news reports came in regarding a flash flood in Rishi Ganga/Dhauli Ganga River in Chamoli district of Uttarakhand state, India. This brief report puts forth the probable causes for this flash flood that has originated in the Nanda Devi Biosphere Reserve using geospatial datasets and techniques. Datasets obtained from MODIS, Sentinel-2B, SRTM, ICESat-2 and ERA5 have been effectively utilized to infer the details about this event. Slow drizzle to severe snowfall has been wi… Show more

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Cited by 5 publications
(7 citation statements)
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“…Syn-collapse seismic signals show that there was no seismic trigger for the collapse (Pandey et al, 2021;Shugar et al, 2021;Cook et al, 2021). Nearby meteorological stations and reanalysis data reveal heavy snowfall and a ∼ 5 K positive temperature anomaly in the week preceding collapse, as well as a temperature inversion in the valley (e.g., Pandey et al, 2021;Dandabathula et al, 2021;Zhou et al, 2021;Shugar et al, 2021). In the longer term, this region has warmed an estimated 0.014 (Zhou et al, 2021) to 0.033 K yr −1 (Shrestha et al, 2021) since 1980, for a total warming of 0.4 to 0.9 K over the past 3 decades.…”
Section: A Possible Avalanche-triggering Mechanismmentioning
confidence: 99%
See 2 more Smart Citations
“…Syn-collapse seismic signals show that there was no seismic trigger for the collapse (Pandey et al, 2021;Shugar et al, 2021;Cook et al, 2021). Nearby meteorological stations and reanalysis data reveal heavy snowfall and a ∼ 5 K positive temperature anomaly in the week preceding collapse, as well as a temperature inversion in the valley (e.g., Pandey et al, 2021;Dandabathula et al, 2021;Zhou et al, 2021;Shugar et al, 2021). In the longer term, this region has warmed an estimated 0.014 (Zhou et al, 2021) to 0.033 K yr −1 (Shrestha et al, 2021) since 1980, for a total warming of 0.4 to 0.9 K over the past 3 decades.…”
Section: A Possible Avalanche-triggering Mechanismmentioning
confidence: 99%
“…In the longer term, this region has warmed an estimated 0.014 (Zhou et al, 2021) to 0.033 K yr −1 (Shrestha et al, 2021) since 1980, for a total warming of 0.4 to 0.9 K over the past 3 decades. Zhou et al (2021) and Dandabathula et al (2021) propose that this sudden temperature increase may have triggered the collapse, and Rana et al (2021) associate it with lubrication of pre-existing fractures via melting of fresh snow. Kropáček et al (2021) and Pandey et al (2021) suggest that loading from heavy snowfall may have contributed to the failure.…”
Section: A Possible Avalanche-triggering Mechanismmentioning
confidence: 99%
See 1 more Smart Citation
“…Nearby meteorological stations and reanalysis data reveal heavy snowfall and a 5 K positive temperature anomaly in the week preceding collapse, as well as a temperature inversion in the valley (e.g. Pandey et al, 2021;Dandabathula et al, 2021;Zhou et al, 2021;Shugar et al, 2021). On the longer term, this region has warmed ∼0.14 K per decade (Qi et al, 2021;Shrestha et al, 2021).…”
Section: A Possible Avalanche Triggering Mechanismmentioning
confidence: 99%
“…On the longer term, this region has warmed ∼0.14 K per decade (Qi et al, 2021;Shrestha et al, 2021). Zhou et al (2021) and Dandabathula et al (2021) propose that this sudden temperature increase may have triggered the the day of collapse, and liquid water would not have been present at the surface (Shugar et al, 2021;Dandabathula et al, 2021). Positive summer temperatures (Shrestha et al, 2021) and a steep surface slope of the collapse block will have prevented strong cumulative surface loading of the collapse block through snow deposition.…”
Section: A Possible Avalanche Triggering Mechanismmentioning
confidence: 99%