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oa Application of the Spectral Indices Ri and Ndwi for the Ecological Assessment of the State of the Water Area of Lake Svitiaz in Connection with the Dynamics of Water Content (2019–2023)
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 17th International Conference Monitoring of Geological Processes and Ecological Condition of the Environment, Nov 2023, Volume 2023, p.1 - 5
Abstract
The article is devoted to the use of the spectral indices remote sensing for spatial assessment of the density of aquatic plants or algae, suspended solids on the surface of Lake Svitiaz (Shatsk group of lakes in Volyn region, Ukraine). As an example, some results of the study performed on fragments of Sentinel-2 L2A for 2019–2023. The use of the spectral index RI allowed to identify the areas of distribution of aquatic plants or algae, the presence of suspended matter in Lake Svitiaz. These indicators are agreed with fluctuations in water levels in the lake during 2019–2023. In the year of higher water content (2023), there is a decrease in the proportion of the lake area occupied by aquatic plants or algae. The spectral index NDWI was used to study the seasonal and long-term dynamics of the state of the lake on satellite images. The study of the surface of the water area of lakes in summer using the spectral indices RI and NDWI can be recommended as a method for preliminary assessment of the ecological state of aquatic ecosystems. The information obtained in this way on the state of lakes allows a better understanding of the dynamics of their ecological state under the influence of natural and anthropogenic factors.