A rectangular sedimentation basin has a width of 12 m. The effluent weirs are on both sides of the effluent launders that extend over the entire width of the basin. The width of the launders is 0.45 m, the design peak flow is 25000 m3/d, and the design weir loading rate is 350 m/m.d. The weir plates have 90 V- notches with Ca = 0.6. a) Determine the number of effluent launders (m). a b) Calculate the total number of 90 V-notches located at a spacing of 20 cm center to center on both sides of the launders. c) Calculate the maximum water depth in the launders (m) assuming that the friction loss is 10 %, and the minimum water depth at the lower end of the launders equals to the critical water depth (d). A rectangular sedimentation basin has a width of 12 m. The effluent weirs are on both sides of the effluent launders that extend over the entire width of the basin. The width of the launders is 0.45 m, the design peak flow is 25000 m3/d, and the design weir loading rate is 350 m/m.d. The weir plates have 90 V- notches with Ca = 0.6. a) Determine the number of effluent launders (m). a b) Calculate the total number of 90 V-notches located at a spacing of 20 cm center to center on both sides of the launders. c) Calculate the maximum water depth in the launders (m) assuming that the friction loss is 10 %, and the minimum water depth at the lower end of the launders equals to the critical water depth (d)