Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2021, Vol. 18, No. 4, pp. 285-290
Dynamics of water bodies areas in the Western Ilmen Lake Region of the Volga Delta
S.S. Shinkarenko
1, 2 , S.А. Bartalev
1 , A.N. Berdengalieva
2 , A.A. Vypritskii
2 1 Space Research Institute RAS, Moscow, Russia
2 Federal Scientific Center of Agroecology, Complex Meliorations and Agroforestry RAS , Volgograd, Russia
Accepted: 15.07.2021
DOI: 10.21046/2070-7401-2021-18-4-285-290
The report is devoted to determining the dynamics in the number of areas and water bodies in the Western Ilmen Lake Region of the Volga Delta. Landsat satellite data allowed identifying the areas of existing and dry water bodies, as well as salt marshes during the summer-autumn low-water period of 1977–2020. We have revealed a decrease in the ilmen area by 40 % in 2020 as compared to 1991, when an extremely high flood took place. Average long-term area of water bodies over the period of 2010–2020 decreased by 135 km2 as compared to the period of 1985–1995. The ilmen area is associated with the maximum flow rates and flood duration. The correlation coefficient of the mean values of the areas of water bodies and the maximum flow rates of floods moving over five years made r = 0.93. The maximum decrease in the number and areas of ilmens was noted in the extremely dry years 1996, 2006 and 2015. In the context of a decrease in water content and the duration of floods, further degradation of the water bodies of the Western Ilmen Lake Region of the Volga delta should be expected. Since there are no hydrological posts in this region, satellite monitoring can serve as a source of information for analyzing hydrological changes in the area.
Keywords: Lower Volga, ilmen, remote sensing, Landsat, hydrology
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