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Consider the following channel that undergoes a smooth constriction in width: B B, B Numeric 1 point Consider flow in a frictionless rectangular channel. The channel undergoes a smooth constriction in width and then returns to its previous width. The width before and after the transition is B1 = 3.00 [m). The transition is smooth and ideally streamlined, so energy losses may be neglected. The depth of flow upstream of the constriction is h1 = 2.91 [m], and the cross section-averaged velocity upstream of the constriction is uj = 3.59 [m/s). Assume that the bed slope is small, so that it can be neglected over the length of the flow transition. Find the width of the constriction By in [m] needed to make the depth pass through the critical depth at the point of maximum constriction. Type your