Figure 5. Time series of measured flow velocities and water depths.
a,b,c,d) Time-continuous plots of horizontal velocity magnitudes
(\(|\overrightarrow{v}|\)) as a function of instantaneous water depth
(\(Y\)) for AD2CP-1 (seaward inflection point, panel a), AD2CP-2 (bend
apex, panel b), ADCP (confluence with side tributary, panel c), and
AD2CP-3 (landward inflection point, panel d). The horizontal velocity
magnitude is computed
as\(\ |\overrightarrow{v}|=\sqrt[2]{|{\overrightarrow{v_{E}}|}^{2}+|{\overrightarrow{v_{N}}|}^{2}}\),
where \(\overrightarrow{v_{E}}\) and \(\overrightarrow{v_{N}}\) are the
Eastward and Northward velocity components measured by the acoustic
instruments, respectively. The horizontal, black-dashed line in each
panel denotes water depth corresponding to the bankfull stage
(\(Y\)=\(Y_{B}\)) for each measuring station. (e,f) Values of peak tidal
velocity asymmetry
(\(\rho_{v}\))
at different measuring stations are plotted against the high-tide water
depth (\(Y_{H}\)) observed during each monitored tidal cycle. Panel e)
shows \(\rho_{v}\) for below-bankfull tidal flows, whereas \(\rho_{v}\)values for above-bankfull flows are displayed in panel f). Data points
represent the average value of \(\rho_{v}\) computed at different
depths, with error bars denoting standard deviation. (g) Values of tidal
duration asymmetry (\(\rho_{d}\)) at different measuring stations are
plotted against the high-tide water depth (\(Y_{H}\)) observed during
each monitored tidal cycle. Different symbols and colors in panels e,f,
and g denote different monitoring stations according to the legend in
the lower-right inset. Calculations of tidal asymmetries were carried
out only when instruments were submerged and both velocity and depth
data could effectively be recorded.