Hydrograph Separation of the Dzhankuat River, North Caucasus, with the use of Isotope Methods

Vasil’chuk, Y.K.; Rets, E.P.; Chizhova, J.N.; Tokarev, I.V.; Frolova, N.L.; Budantseva, N.A.; Kireeva, M.B.; Loshakova, N.A.

Авторы: 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.
Журнал: Water Resources
Том: 43
Номер: 6
Год издания: 2016
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 847
Последняя страница: 861
Оригинальные версии: Расчленение гидрографа стока реки Джанкуат, Центральный Кавказ с помощью изотопных методов
DOI: 10.1134/S0097807816060087
Аннотация: 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 δ18O 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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