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RECENT TRENDS Of RIVER RUNOff IN THE NORTH CAUCASUS

https://doi.org/10.24057/2071-9388-2018-11-3-61-70

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Abstract

Based on observational data from 70 hydrological stations in the North Caucasus an evaluation of present values of mean annual runoff, minimum monthly winter and summer runoff was carried out. Series of maps was drawn. Significant changes in mean annual. minimum monthly and maximum runoff during last decades have been revealed in the North Caucasus. A rise in both amount of water availability and potential natural hazard is characteristic of the most of the North Caucasus that is considered to be caused by recent climate change. Mean annual runoff during 1978-2010 increased compared to 1945-1977 by 5-30 % in the foothills and by 30-70% in the plain area. An increase in winter minimum monthly runoff is as well most intensive in the plain part of study area (>100%). Within the foothills it amounts to 50-100%. In mountainous area long-term oscillation of winter minimum monthly discharge strongly depends on local factors, such as geological structure. The rate of the increase in summer minimum monthly discharge regularly grows from central foothill part of Northern Caucasus (30-50%) to the Western plain territory (70-100%). In Kuban river basin 30% of analyzed gauging stations show positive trend in maximum instantaneous discharge, while 9% negative. On the contrary, in the Eastern part – Terek river basin – negative trend in maximum instantaneous discharge is prevalent: 38% of gauging stations. Positive trend in Terek river basin is characteristic of 9.5% of analyzed gauging stations.

About the Authors

E. P. Rets
Water Problems Institute, Russian Academy of Sciences.
Russian Federation
PhD in Geography.Moscow.


R. G. Dzhamalov
Water Problems Institute, Russian Academy of Sciences.
Russian Federation
Moscow.


M. B. Kireeva
Faculty of Geography, Lomonosov Moscow State University.
Russian Federation
Moscow.


N. L. Frolova
Faculty of Geography, Lomonosov Moscow State University.
Russian Federation
Moscow.


I. N. Durmanov
Water Problems Institute, Russian Academy of Sciences.
Russian Federation
Moscow.


A. A. Telegina
Water Problems Institute, Russian Academy of Sciences.
Russian Federation
Moscow.


E. A. Telegina
Water Problems Institute, Russian Academy of Sciences.
Russian Federation
Moscow.


V. Yu. Grigoriev
Water Problems Institute, Russian Academy of Sciences.
Russian Federation
Moscow.


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For citation:


Rets E.P., Dzhamalov R.G., Kireeva M.B., Frolova N.L., Durmanov I.N., Telegina A.A., Telegina E.A., Grigoriev V.Y. RECENT TRENDS Of RIVER RUNOff IN THE NORTH CAUCASUS. GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY. 2018;11(3):61-70. https://doi.org/10.24057/2071-9388-2018-11-3-61-70

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ISSN 2071-9388 (Print)
ISSN 2542-1565 (Online)