The average flow in a river channel, Q (m3/s), with an irregular cross-section can be comp...

The average flow in a river channel, Q (m³/s), with an irregular cross-section can be computed as the integral of the product of velocity and depth

where U(y) = water velocity (m/s) at distance y (m) from the bank, and H(y) = water depth (m/s) at distance y from the bank. Use integral along with spline fits of U and H to the following data collected at different distances across the channel to estimate the flow.