A long river system with a constant slope of S= 0.0003 and constant width B = 20 m, carries a constant flow rate per unit width of q = 4 m2/s. The channel bed consists of uniform quartz sediment with mean grain size of d50= 1 mm and porosity of 0.3. You can assume hydraulically fully rough turbulent flow and that ks = d50. Complete the following tasks: Calculate the bed load sediment transport rate that is transported annually.