Fig. 5.
a) Results of the HCA performed on MSI Rrs spectra between 443 and 865 nm, extracted from the Po river channel near Pontelagoscuro gauging station for the periods before, during and after the lockdown. b) Chlorophyll concentration, Water Turbidity (derived from MSI), and Po River discharge near the Pontelagoscuro gauging station corresponding to the date of acquisition of the Sentinel2 Rrs spectra. Data are shown in chronological order. c) Results of the multi-year HCA performed on MSI Rrs spectra between 443 and 865 nm, extracted from the Po River channel at Pontelagoscuro gauging station from 2018 to 2020. d) Means (and standard deviation) of Chl-a concentration, Water Turbidity (derived from MSI), and Po River discharge near the Pontelagoscuro gauging station corresponding to each cluster, identified by the HCA.