Outburst hazard of little-studied lakes assessment at the Mongun-Taiga massif

Rasputina, Valeria; Ganyushkin, Dmitry; Bantcev, Dmitry V.; Pryakhina, Galina; Vuglinsky, Valery; Svirepov, Stepan S.; Paniutin, Nikolai A.; Volkova, Daria D.; Nikolaev, Mihail R.; Siroezhko, Evgenii V.

doi:10.21638/spbu07.2021.304

Cited by 5 publications

(1 citation statement)

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“…The retreat of mountain glaciers, currently occurring as a result of global climate change, leads to an increase in the area of mountain lakes and an increased risk of outburst of moraine dams [1,2]. Such processes have been observed in the Himalayas, the Altai, the Pamir, Tibet, the Cordillera Blanca region, Spitsbergen, and Iceland [1,[3][4][5][6][7]. One of the possible mechanisms for the outburst of moraine dams, along with overflowing over the crest, is the formation of a filtration channel (piping).…”

Section: Introductionmentioning

confidence: 99%

Modelling of a Lake Outburst as a Result of the Development of Piping

Pryakhina,

Rasputina,

Svirepov

2024

Water

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The retreat of mountain glaciers inevitably leads to an increase in the number of outburst moraine lakes. One of the possible mechanisms of moraine dam outburst along with overflow over the crest is the formation of a filtration channel in the body of the moraine dam (piping). An algorithm for calculating the outburst flood hydrograph, describing the development of a filtration channel in the body of a moraine dam and the subsequent formation of water overflow when the soil above the channel collapses, is proposed in this paper. Verification of proposed methodology was carried out on the basis of experimental data and published data of real outbursts. Satisfactory results verifying this methodology made it possible to use the proposed methodology for the calculation of the hydrograph of the outburst of Lake Bashkara in the Elbrus region, which occurred on 1 September 2017. It is shown that the simulation results are quantitatively comparable with the estimates obtained from field data: the time of water discharge through the channel was 16 min, the period of the outburst wave passage was 40 min, and the maximum discharge was 636 m3/s. Thus, the possibility of applying the proposed methodology for calculating the destruction of natural moraine dams has been demonstrated.

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Section: Introductionmentioning

confidence: 99%

Modelling of a Lake Outburst as a Result of the Development of Piping

Pryakhina,

Rasputina,

Svirepov

2024

Water

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Features of the Level Regime of Periglacial Moraine-Dammed Lakes in the Growth Stage (Based on the Example of Lakes of the Tavan–Bogdo–Ola Mountain Range, South Eastern Altai)

Rasputina,

Pryakhina,

Ganyushkin

et al. 2023

Water Resour

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Interdisciplinary Analysis Ofclimate-Forced Landscape Changes in the Highlands of Altai: Natural Scientific and Sociological Evidence

Maximova,

Ganyushkin,

Omelchenko

et al. 2023

SSI

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Mountain territories are the object of close attention of scientists due to the ongoing changes in the cryosphere. Altai is one of the world centers of glaciation, where climatic changes occur most intensively. The article presents the results of an interdisciplinary geographical and sociological study of climatic changes in the highlands of the Altai Republic, conducted in 2022 by scientists from Altai State University and St. Petersburg State University. On the basis of geological-landscape study on the reconstruction and cataloging of glaciers of the Little Ice Age and the forecast of dangerous exogenous processes, landscape changes and socio-economic parameters, settlements for sociological surveys were selected (six settlements of Kosh-Agach and Ulagan districts, n = 347). The research showed that glaciers of the North Chuysky Ridge have lost 61% of their area since the Little Ice Age, with 7% of the area reduced in the last 20 years. There have been qualitative changes in glacier melting - currently, large glaciers are experiencing the greatest degradation. The population of high-mountainous areas perceive climate change as significant, affecting their daily and economic life. Living near changing glaciers is associated with difficulties and additional costs for agriculture, destruction of communication and engineering infrastructure. Meanwhile, the climate agenda is not overly actualized, the population of high-mountainous areas demonstrates a high potential for adaptation, including due to traditional knowledge of nature management and living in harsh climates.

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Outburst hazard of little-studied lakes assessment at the Mongun-Taiga massif

Cited by 5 publications

References 0 publications

Modelling of a Lake Outburst as a Result of the Development of Piping

Modelling of a Lake Outburst as a Result of the Development of Piping

Features of the Level Regime of Periglacial Moraine-Dammed Lakes in the Growth Stage (Based on the Example of Lakes of the Tavan–Bogdo–Ola Mountain Range, South Eastern Altai)

Interdisciplinary Analysis Ofclimate-Forced Landscape Changes in the Highlands of Altai: Natural Scientific and Sociological Evidence

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