Canal effect figure shows an anchored barge that extends across a canal by distance d = 30m and into the water by distance b = 12m. The canal has a width D = 55m, & water depth H = 14m, and a uniform water-flow speed vi = 1.5m/s. Assume that the flow around the barge is uniform. As the water passes the bow, the water level undergoes a dramatic dip known as the canal effect. If the dip has depth h = 0.80m, what is the water speed alongside the boat through the vertical cross sections at

(a) Point a and

(b) Point b? The erosion due to the speed increase is a common concern to hydraulicengineers.