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oa Dynamics of the Area of the Shatsk Lakes Over a Long-Term Period Based on Remote Sensing Data in Connection with Fluctuations in their Level
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 18th International Conference Monitoring of Geological Processes and Ecological Condition of the Environment, Apr 2025, Volume 2025, p.1 - 5
Abstract
The purpose of the study was to assess the long-term dynamics of the area of the Shatsk Lakes (Volyn region, Ukraine) and the spread of water blooms on their surface using remote sensing data in connection with fluctuations in the level of these reservoirs for the period 1985–2023. Satellite images from the American Landsat-5,7,8 mission and the European Sentinel-2 L2A mission were used. Long-term state monitoring data on the water level of Lake Svityaz and the amount of precipitation were also used. It was established that the area of the Shatsk Lakes (Svitiaz, Liutsymer, Chorne Velyke) over a long period of time, studied using satellite images using the NDWI (Normalized Difference Water Index), amounted to the average annual value: Svitiaz – 85–101 %; Liutsymer – 85–100 %; Chorne Velyke – 79–100 %. The area of water bloom in these lakes over a long-term period, studied using satellite images using the NDTI (Normalized Difference Turbidity Index), ranged from the average annual value: Svitiaz – 0.04–4.43 %; Liutsymer – 0.2–7.9 %; Chorne Velyke – 0.1–11.9 %. Among the studied lakes, minimal water bloom is observed in the largest among them, Svitiaz, which indicates its better ecological condition. In 2023, the area of Svityaz Lake was the largest in the last 10 years, as the water level in the lake was also the highest in a decade, which is mainly due to good winter snow reserves. The use of remote sensing techniques to study the morphometric parameters of lakes can provide valuable results for identifying environmental problems.