A navigation channel has a depth of 8 m. The bed of the channel is flat and comprised of sandy sediments which have a pa

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A Navigation Channel Has A Depth Of 8 M The Bed Of The Channel Is Flat And Comprised Of Sandy Sediments Which Have A Pa 1 (211.88 KiB) Viewed 10 times

A navigation channel has a depth of 8 m. The bed of the channel is flat and comprised of sandy sediments which have a particle size distribution as shown in the figure and table below. Calculate the threshold depth-average current speed in the channel at which sediment transport will start. Assume the viscosity of water is 1.36 x 106m²s-1, the density of the grain is 2650 kg/m², the density of water is 1025 kg/m3, and gravity is 9.81 m/s2. Sieve Size (mm) 4.750 Passing % 100 90 100 2.360 100 80 1.180 99 70 0.600 90 0.425 75 60 0.300 50 % Passing 50 20 0.150 0.075 5 40 2 30 0.063 0.047 0.034 0 0 20 10 0 0.010 10.000 0.100 1.000 Particle Size (mm)