ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa


Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2021, Vol. 18, No. 2, pp. 216-229

Investigation of seasonal changes in water temperature in lake part of Gorky Reservoir in 2018 based on in situ measurements and high-resolution satellite images

A.A. Molkov 1, 2 , M.G. Grechushnikova 3 , I.A. Kapustin 1, 2 , G.V. Leshchev 1 , A.A. Aleskerovа 4 , M.Yu. Grishchenko 3, 5 
1 Institute of Applied Physics RAS, Nizhny Novgorod, Russia
2 Volga State University of Water Transport, Nizhny Novgorod, Russia
3 Lomonosov Moscow State University, Moscow, Russia
4 Marine Hydrophysical Institute RAS, Sevastopol, Russia
5 State Nature Reserve Kurilskiy, Yuzhno-Kurilsk, Sakhalin Region, Russia
Accepted: 28.01.2021
DOI: 10.21046/2070-7401-2021-18-2-216-229
The main goal of current investigation is the analysis of spatio-temporal variability of water temperature in dam area of the Gorky Reservoir from May to October 2018 using ship measurements and Landsat-8/OLI images. Here we demonstrate variability of the vertical gradient of water temperature and its dependence on meteorological conditions in different parts of the water study area. Also, the seasonal spatial variability of water surface temperature is analyzed and examples of its retrieval by satellite images are presented. Accuracy of such retrieval was obtained for different parts of the reservoir and depending on meteorological conditions. Based on these results, we concluded that it is necessary to carefully use in-situ data obtained later than satellite imagery, taking into account the spatial and temporal variability of water temperature, which depends on synoptic conditions and the phase of the water reservoir regime. Presented results can be useful in analysis of archived satellite images to retrieve interannual and seasonal variability of water temperature with a high spatial resolution on scales exceeding the capabilities of traditional station measurements.
Keywords: remote sensing, satellite monitoring, Landsat-8, water temperature, Gorky Reservoir
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