## 4 Results and Discussion
### Demonstration Case of 15-17 September 2020. Test of the Integration of the Analyzed Variables
This feature was related to the transport of water from rivers, located northeast of Lido inlet, which was driven by the coastal current, as visible in the satellite-derived SST maps of 15 th and 16 th September in Supplementary Materials Figure S2. Beneath this structure, a salt wedge characterized by typical seawater salinity and a relatively warmer temperature was visible (24.8 \({}^{\circ}\)C and 35.5 psu) and extended seaward all the way to St8. The buoyant plume did not affect turbidity, which remained quite low along the transect, from the lagoon to the open sea, with values within 7.5 FNU and no significant trend was measured along the water column. These results were consistent with the corresponding satellite derived product. During the ADCP acquisitions along the TRP and SN transects on 16 th and 17 th September, profiles of temperature, salinity and turbidity were measured over the bottom-mounted ADCPs, at the centre of the channels (see Figure 1). The results are represented as a time series in the Figure 13. The profiles were acquired hourly from 8:00 AM to 1:00 PM in the late flood/ebb-tide phase. On 16 September, the evolution of the water parameters in the two sections was similar: salinity along the water column was rather constant and a slight difference was visible (\(\Delta\)Salinity = 0.6 psu) both for the TRP and SN channels (Figure 13a,b). Minor differences in temperature (\(\Delta\)Temperature \(\leq\) 0.5 \({}^{\circ}\)C) were observed with a relative progressive increase in the whole profile with the arrival of water from the inner lagoon heated by solar radiation over the shallow areas. A similar behaviour was displayed by the temperature also on 17 September, while a saltier structure (34.75 psu) was present in the bottom layer from 9:00 to 12:00 AM (Figure 13c,d). In both the measured intervals, turbidity increased during the ebb phase in the whole water column. A more complex evolution was observed at TRP where the resuspension by the shear stress at the maximum flow determined higher turbidity in the bottom layer. Figure 12: Representations of CTD casts (temperature, salinity and turbidity) along the lagoon–sea transect (white dotted line in Figure 1) on 15 September 2020. Plot generated with Ocean Data View software ([[https://odv.awi.de](https://odv.awi.de)]([https://odv.awi.de](https://odv.awi.de)), 2021 accessed on 12 July 2022). Figure 13: Time series of salinity, temperature and turbidity from CTD casts acquired over the fixed ADCPs at the TRP and SN sections on 16 th ((**a**,**b**) respectively) and 17 th ((**c**,**d**) respectively) September 2020. Vertical red dashed lines mark the satellites overpass time. Plot generated with Ocean Data View software ([[https://odv.awid.de](https://odv.awid.de)]([https://odv.awid.de](https://odv.awid.de)), 2021 accessed on 12 July 2022). Turbidity data obtained from the conversion of backscatter of the boat-mounted ADCP along SN and TRP transects permitted the investigation of the pattern of suspended transport in the two sections. Figure 14 shows the turbidity transects acquired synchronously to the satellite overpass on 16 and 17 September. In both the visualized situations, the water column is well-mixed with minor spatial differences in the distribution of suspended particles. Relatively higher turbidity was evident on the NE side of the TRP channel (Attribidity of 1.5 FNU). This is a typical feature of the Lido inlet, which is strictly related to the resuspension of bottom sediments due to the shallow depth of this side of the channel. Coherent patterns were also visible at the surface on satellite-derived products (Figure 11) and reported on in the results of previous research [25]. Figure 14: Turbidity values along the transects in sections SN (**left** panels) and TRP (**right** panels) (panel **a**) measurements done on 16 September 2020 (9:40 AM SN transect, 10:00 AM TRP transect) and in (panel **b**) 17 September 2020 (10:02 AM SN transect, 10:23 AM TRP transect) September 2020. The direction of all the transects is SW to NE.