1. A smooth spillway discharges 25 m 2 /s. At a sampling location, the air-water depth Y90 is estimated to 1.85 m and the depth-averaged void fraction is 0.21. Calculate the flow velocity and plot the...

1. A smooth spillway discharges 25 m²/s. At a sampling location, the air-water depth Y90 is estimated to 1.85 m and the depth-averaged void fraction is 0.21. Calculate the flow velocity and plot the void fraction distribution.

2. Calculate the settling velocity for a sand particle of d50 = 0.5 mm, and a silt particle of d50 = 25µm using all expressions presented in Table 8.3. Consider a water temperature of 18◦C. Compare results of different formulas with a plot.