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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2021, Vol. 18, No. 6, pp. 214-221

On the formation of an isolated lens of a river runoff by a whirlpool in the Gorky Reservoir

I.A. Kapustin 1, 2 , S.A. Ermakov 1, 3 , M.V. Smirnova 3, 1 , D.V. Vostryakova 1, 2 , A.A. Molkov 1, 3 , E.Yu. Cheban 3 , G.V. Leshchev 1, 2 
1 Institute of Applied Physics RAS, Nizhny Novgorod, Russia
2 Lobachevsky State University of Nizhni Novgorod, Nizhny Novgorod, Russia
3 Volga State University of Water Transport, Nizhny Novgorod, Russia
Accepted: 02.12.2021
DOI: 10.21046/2070-7401-2021-18-6-214-221
The structure in the water area of the Gorky Reservoir is highly variable and contains a main channel flow and large eddy formation, characterized in the literature as whirlpools. The formation of the whirlpools is mainly determined by wind conditions, uneven runoff through the hydroelectric power plants and bathymetry, and the phenomenon was investigated in a number of experimental studies. An isolated “lens” formed by the water mass of a river runoff and located in the circulation area in the floodplain part of a reservoir was observed for the first time due to hydrophysical and hydrochemical observations in the Gorky Reservoir. The lens formation mechanism associated with the capture of a river plume by a whirlpool under conditions of variable water discharge through the hydroelectric power plant and the operation of sluices, and leading to inhibition of the river runoff is proposed. The lens is characterized by lower values of the electrical conductivity of water in comparison with the surrounding waters of the reservoir. During the survey of the nearest tributaries, a water source with similar characteristics was found. It is shown that the water mass of the river plume captured by the circulation current can move along the reservoir over long distances (6 km or more) from the river mouth, remaining practically unmixed with the surrounding reservoir water.
Keywords: Gorky Reservoir, currents, water circulation, river outflow, tributaries, hydrochemical indicators
Full text

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