Assessment of chlorophyll indices with Sentinel-2 data in San Roque reservoir, Córdoba, Argentina
DOI:
https://doi.org/10.24850/j-tyca-2026-01-10Keywords:
Sentinel-2, Chlorophyll-a, Chl-a, NDCI, NDVI, GCI, RCl, GEE, San Roque reservoir, ArgentinaAbstract
In this study, specific indices derived from Sentinel-2, processed using Google Earth Engine (GEE), were used to estimate chlorophyll-a (Chl-a) concentration in the San Roque Reservoir, Córdoba, Argentina. The evaluated indices include the normalized difference chlorophyll index (NDCI), normalized difference vegetation index (NDVI), green chlorophyll index (GCI), and red chlorophyll index (RCl).
The NDCI index resulted the best option among the four specific indexes evaluated, providing a fit with a coefficient of determination (R²) close to 0.8 and statistically significant in relation to measured Chl-a values. It accurately represents the spatial and temporal dynamics of the measured Chl-a concentrations. The application of this index would improve the current management tools for this important provincial water body.
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