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. 2022 Aug 8;12:13529. doi: 10.1038/s41598-022-17299-5

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© The Author(s) 2022

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

PMC Copyright notice

Buoys location in As Conchas reservoir. (1) Dam buoy (41 $^{\circ}$ 56’41.78”N; 8 $^{\circ}$ 1’47.96”W) and (2) beach buoy (41 $^{\circ}$ 57’56.57”N; 7 $^{\circ}$ 59’15.27”W). The image was taken by sentinel 2 on September 25, 2018, a cloudless day. The daily mean Chl-a collected by the beach buoy on that day was 24.70 $μ$ g/L, while at the dam buoy it was 41.98 $μ$ g/L. The satellite image was obtained from the ESA (European Space Agency) Sentinel database using the Application Platform (SNAP) that is an open access software developed by Brockmann Consult, SkyWatch and C-S under the Creative Commons CC BY-SA 3.0 IGO license (https://step.esa.int/main/download/snap-download/, https://www.esa.int/ESA_Multimedia/Copyright_Notice_Images). The image was generated in RGB, channels B4, B3 and B2 (pixel resolution 10m). Water colors were highlighted using the histogram (RGB) and normalized. Finally, the study area was cropped and this figure was composed.