Assessment of the Diffuse Attenuation Coefficient of Photosynthetically Active Radiation in a Chilean Lake

The diffuse attenuation coefficient of photosynthetically active radiation is an important inherent optical property the subaquatic light field. This parameter, as a measure transparency medium, good indicator water quality. Degradation properties due to anthropogenic disturbances common phenomenon in freshwater ecosystems. In this study, we used four algorithm-based Landsat 8 OLI and Sentinel-2A/B MSI images estimate Lake Villarrica located south-central Chile. algorithms’ estimated data from ACOLITE module were validated with situ measurements six sampling stations. Seasonal intralake variations studied. relationship between radiation, meteorological parameters, classification was also explored. best results obtained QAA v6 KdPAR Nechad (R2 = 0.931, MBE 0.023 m−1, RMSE 0.088 MAPE 35.9%) for spring v5 Kd490 algorithms 0.919, −0.064 −0.09 30.3%) summer. High values are associated strong wind precipitation events suggest they caused by sediment resuspension. Finally, ecosystems proposed lake. promising study that combination observation satellites can be useful assessing bio-optical state quality dynamics Chilean aquatic systems.