Figure 6. Relationships between depth-averaged velocity (DAV ), water depth (Y ), and water-depth change rate (\(\dot{Y}=\ dY/dt\)) at the four measuring stations. Columns from the left- to the right-hand side of the figure show, respectively, results for AD2CP-1 (seaward inflection point), AD2CP-2 (bend apex), ADCP (side tributary confluence), and AD2CP-3 (landward inflection point). Red and blue quadrants represent data obtained during the flood and the ebb phase, respectively. (a, b, c, d) Water depth (\(Y\)) vs. depth-averaged velocity (DAV ) curves for all the monitored tidal cycles. Red and blue points denote the maximum flood and ebb DAVs of each tidal cycle. (e, f, g, h) Water depth (\(Y\)) vs. water-depth change rate (\(\dot{Y}\)) curves for all the monitored tidal cycles. Red and blue points denote the maximum flood and ebb \(\dot{Y}\) of each tidal cycle. (i, j, k, l) Depth-averaged velocity (DAV ) as a function of water-depth change rate (\(\dot{Y}\)) for below-bankfull stages during all the monitored tidal cycles. (m, n, o, p) Depth-averaged velocity (DAV ) as a function of water-depth change rate (\(\dot{Y}\)) for above-bankfull stages during all the monitored tidal cycles.