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oa The Study of Group of Shatsk Lakes (BNDVI index) During the Season of Minimum Recreational Load - 2022
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 16th International Conference Monitoring of Geological Processes and Ecological Condition of the Environment, Nov 2022, Volume 2022, p.1 - 5
Abstract
This study is devoted to the study of the state of the surface of the Svityaz and Pisochne lakes in the summer of 2022, when due to the military aggression of Russia against Ukraine (began on February 24, 2022) and the threat of attack from Belarus, the smallest influx of tourists to the Shatsk Lakes was observed in recent decades. The purpose of the study is study the distribution of phytoplankton biomass in the Svityaz and Pisochne lakes in the summer period of 2022 and compare it with the long-term period (1993–2021) using the Blue Normalized Difference Vegetation Index (BNDVI). This is achieved through the ratio of spectral bands highlighting areas covered with algae on the surface of the water in satellite images. The study of the state of the surface of the water area of the Svityaz and Pisochne lakes using BNDVI for 1993–2022 showed the presence of phytoplankton biomass on satellite images of the summer period. In 2022, with a significant decrease in the number of tourists, the state of the surface of the water area improved. On Svityaz, there was a decrease in the area occupied by algae by 55% comparing to the average annual, and on Pisochne - by 31%. The study of the surface of the water area of lakes in summer using the BNDVI can be recommended as a method for preliminary assessment of the ecological state of aquatic ecosystems.