A commonly used bedload transport formula in fluvial settings is the Meyer-Peter-Muller formula. One version of this is simply:

Q=A(t_b-t_c)^3/2, where A = 0.04 (and the units of A work out such that Q is in kg m^-1 s^-1, and shear stresses are in N/m²). Using this formula, and coarse sand of diameter D = 5 mm in the channel and flow conditions described in #1, what do you expect for the discharge of sand in this channel? The channel is 10 m wide. Provide your answer in kg/s.