On the influence of rock glacier dynamics on the runoff in basin of the Ulken Almaty (Bolshaya Almatinka) River, Northern Tien Shan

Мұқаба

Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
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Рұқсат жабық Тек жазылушылар үшін

Аннотация

The purpose of the work was to study the dynamics of mountain stone glaciers and streams flowing down from them for an understanding their hydrological significance. Two glaciers: Morenny and Gorodetsky, were analyzed, both located in the river Ulken Almaty (Big Almatinka) basin, Northern Tien Shan. On the average, the rate of surface displacement of the Morennoye glacier is higher than that of the Gorodetsky, which is associated with increased ice content of the last one. The increase in rates of surface displacement of both stone glaciers revealed in 2021–2022 when compared to previous years turned out to be consistent with the widely discussed idea of intensification of such glaciers dynamics under the present-day climate changes and glacier retreats. It was found that the stone glaciers have a pronounced influence on the water regime, temperature and chemical composition of watercourses formed by water running out from them. They are distinguished by the almost complete absence of intraday fluctuations in the level, temperature, and specific electrical conductivity of water, which are more pronounced in rivers and streams with glacial alimentation during the summer time. Some waterflows from the Gorodetsky glacier do not freeze in winter, which is indicative of significant groundwater reserves in its body. The waters of each of the above stone glaciers differ in their characteristic mineralization, temperature, and the ratio of the major ions. The stable water flow from such glaciers can play an important role in maintaining a river runoff during periods of the low stream discharge.

Толық мәтін

Рұқсат жабық

Авторлар туралы

L. Lebedeva

Melnikov Permafrost Institute, Siberian Branch of RAS; Central Asian Regional Glaciological Center category 2 under the auspices of UNESCO

Хат алмасуға жауапты Автор.
Email: lyudmilaslebedeva@gmail.com
Ресей, Yakutsk; Almaty

V. Kapitsa

Central Asian Regional Glaciological Center category 2 under the auspices of UNESCO

Email: lyudmilaslebedeva@gmail.com
Ресей, Almaty

Z. Takibaev

Central Asian Regional Glaciological Center category 2 under the auspices of UNESCO

Email: lyudmilaslebedeva@gmail.com
Қазақстан, Almaty

V. Goncharenko

Melnikov Permafrost Institute, Siberian Branch of RAS; Central Asian Regional Glaciological Center category 2 under the auspices of UNESCO

Email: lyudmilaslebedeva@gmail.com
Ресей, Yakutsk; Almaty

V. Lytkin

Melnikov Permafrost Institute, Siberian Branch of RAS

Email: lyudmilaslebedeva@gmail.com
Ресей, Yakutsk

A. Kamalbekova

Institute of Geography and Water Security; Al-Farabi Kazakh National University

Email: lyudmilaslebedeva@gmail.com
Қазақстан, Almaty; Almaty

Әдебиет тізімі

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Әрекет
1. JATS XML
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2. Fig. 1. Scheme of the study site.

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3. Fig. 2. Surface displacement of Gorodetsky rock glacier for 2019–2022, 2019–2021 and 2021–2022. The colored lines show the areas of UAV flights in different years.

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4. Fig. 3. Surface displacement of the rock glacier Morenny for 2019–2022, 2019–2021 and 2021–2022.

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5. Fig. 4. Water temperature of streams flowing from rock glaciers (r.g.) (а): 1 — stream from r.g. Tourists, 2 — stream from r.g. Morenny, 3 — stream Main from r.g. Gorodetsky, 4 — stream Central from r.g. Gorodetsky; Air temperature from August 2019 to October 2022 (б).

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6. Fig. 5. Diagrams of range of values of water TDS, mg/l.

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© Russian Academy of Sciences, 2024

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