Using remote sensing and numerical modelling to quantify a turbidity discharge event in Lake Garda

We investigate the effect of the Adige-Garda spillway opening on 03/03/2020 on Lake Garda using numerical modelling and maps of Suspended Particulate Matter (SPM) concentration. SPM maps are obtained from Sentinel-2 images processed using the BOMBER bio-optical model. Three dates representing before, the event and a few days later are examined. Maps indicate a significant increase in SPM concentrations, especially in the northern part of the lake close to the hydraulic tunnel outlet. Results are consistent with the modelled flow field. Remote sensing effectively captures the event's spatial and temporal variation, while numerical modelling explains and corroborates the observed patterns.