Hydrograph separation of the Dzhankuat River, North Caucasus, with the use of isotope methods

Hydrograph separation of the Dzhankuat River, North Caucasus, with the use of isotope methods

The formation of snowmelt runoff from the Dzhankuat glacier has been considered and the hydrograph of the Dzhankuat R. has been separated with the use of isotope and ionic balance. Isotope variations of runoff at the outlet section of the Dzhankuat R. have been studied for two ablation seasons of 20...

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Bibliographic Details
Published in:Water resources Vol. 43; no. 6; pp. 847 - 861
Main Authors: Vasil’chuk, Yu. K., Rets, E. P., Chizhova, Ju. N., Tokarev, I. V., Frolova, N. L., Budantseva, N. A., Kireeva, M. B., Loshakova, N. A.
Format: Journal Article
Language:English
Published: Moscow Pleiades Publishing 01-11-2016
Springer Nature B.V
Subjects:
Aquatic Pollution
Earth and Environmental Science
Earth Sciences
Firn
Glaciers
Glaciohydrology
Hydrogeology
Hydrographs
Hydrography
Hydrology/Water Resources
Isotopes
Melting
Mineralization
Outlets
Rivers
Runoff
Snow cover
Snowmelt
Waste Water Technology
Water Management
Water Pollution Control
Water Resources and the Regime of Water Bodies
Caucasus
hydrograph separation
isotopic composition
Caucasus
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Summary:The formation of snowmelt runoff from the Dzhankuat glacier has been considered and the hydrograph of the Dzhankuat R. has been separated with the use of isotope and ionic balance. Isotope variations of runoff at the outlet section of the Dzhankuat R. have been studied for two ablation seasons of 2013 and 2014. The separation of 2014 hydrograph was based on δ 18 O and mineralization values obtained for various sources of Dzhankuat R. recharge: precipitation, snow of different seasons, firn, ice, and groundwater. The isotopic separation of the hydrograph has shown that, in June, a considerable portion (15–20%) of Dzhankuat R. total runoff is due to the melting snow cover that has formed during spring snowfalls. In June, the proportion of this component in the total daily runoff can reach 36%. The contribution of the runoff originating from winter-snow melting varies from 20% in the early to 50% in the late June. In August and September, the share of groundwater varies from 30 to 100%; the share of precipitation, from 0 to 30% (on the average for the period, 6%); and the share of water from melting firn and ice, from 0 to 70% (on the average, 38.6%).
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ISSN:0097-8078
1608-344X
DOI:10.1134/S0097807816060087