## 4 Results and Discussion
### Long-Term Dataset of In Situ Turbidity, Hydrodynamics and Meteo-Marine Forcing
At TRP, the vertically averaged turbidity slightly increased up to 18 FNU, but did not exhibit a clear signal of wind effects as visible at the surface. Figure 8: Subset of the time series presented in Figure 7. Left panel: from 18 th to 20 th August 2020. Right panel: from 8 th to 10 th September. Hourly time series of tidal level (**a**) and wind speed and direction (red = 0\({}^{\circ}\)–90\({}^{\circ}\), yellow = 90\({}^{\circ}\)–180\({}^{\circ}\), green = 180\({}^{\circ}\)–270\({}^{\circ}\), cyan = 270\({}^{\circ}\)–360\({}^{\circ}\)) (**b**), measured at the Lido Sud station; time series of discharge estimated with the index-velocity method from data of the bottom-mounted ADCPs (positive values of discharge indicate a seaward flow) (**c**); time series of surficial turbidity measured at fixed TRP and SN stations. (**d**); the vertically averaged turbidity derived from the conversion of acoustic backscatter from the bottom-mounted ADCPs (**e**). Periods of intense wind, particularly bora, such as in the case of 5-7 July 2020 (Figure 9), determine the occurrence of relatively higher turbidity peaks associated to the flood tidal phases that transport into the lagoon not only sand at the bottom, but also a significant amount of fine suspended particles at the surface, as visible in the records of fixed turbidimeters. According to [25], bora winds with intensities higher than 9 m s\({}^{-1}\) significantly affect the suspended particle transport at the Lido inlet and the adjacent littoral at north, as well as the shallow-water areas within the northern lagoon basin. The north littoral represents an important source of suspended sediments for the Lido inlet: materials resuspended and mobilized on the beaches and in the shoreface are transported longshore and enter the inlet following the flood currents and transporting the suspended load for a long distance into the flood-tidal delta and inner lagoon areas [21]. The northern lagoon basin has larger terrestrial inputs from the Dese River and the Silone Channel--the two main freshwater tributaries of the drainage basin [39]. Moreover, it is characterized by large mud-flats and saltmarshes, which are more susceptible to resuspension by wind waves than the other parts of the lagoon. These morphological characteristics of the northern lagoon basin strongly influence the sediment transport through the Lido inlet, since the area is mainly drained by the TRP channel. Figure 9: Subset of the time series presented in Figure 7 for the period from 5 to 7 July 2020. Hourly time series of tidal level (**a**) and wind speed and direction (red = 0\({}^{\circ}\)-90\({}^{\circ}\), yellow = 90\({}^{\circ}\)-180\({}^{\circ}\), green = 180\({}^{\circ}\)-270\({}^{\circ}\), cyan = 270\({}^{\circ}\)-360\({}^{\circ}\)) (**b**), measured at the Lido Sud station; time series of discharge estimated with the index-velocity method from data of the bottom-mounted ADCPs (positive values of discharge indicate a seaward flow) (**c**); time series of surficial turbidity measured at fixed TRP and SN stations (**d**); and the vertically averaged turbidity derived from the conversion of acoustic backscatter from the bottom-mounted ADCPs (**e**). Vertical blue line marks the S2 satellite overpass time. Overall, the analysis of the time series emphasizes that surficial turbidity and vertically averaged turbidity from the bottom-mounted ADCPs are controlled by hydrodynamics and meteo-marine conditions, as demonstrated in [19; 25; 26; 27; 28].