Salinity and Tides in Alluvial Estuaries

| a | Cross-sectional convergence length [L] | |
| A | Cross-sectional area [L 2] | |
| | Amplitude of the cross section [L 2] | |
| A f | Cross-sectional area of the flood channel [L 2] | |
| A 0 | Cross-sectional area at the estuary mouth [L 2] | |
| b | Convergence length of the stream width [L] | |
| B | Stream width [L] | |
| B L | Width at which there are no ebb and flood channels [L] | |
| B S | Storage width [L] | |
| B 0 | Width at the estuary mouth [L] | |
| c | Wave celerity [L/T] | |
| c i | x-dependent coefficient equal to the ratio between dispersion coefficient and the fresh water velocity [-] | |
| c 0 | Classical wave celerity [L/T] | |
| C | Convergence term (Chapter 3) [-] | |
| C | Coefficient of Ch zy [L 0.5/T] | |
| d s | Sediment transport factor [L (2-n)T (n-1)] | |
| D | Longitudinal dispersion [L 2/T] | |
| D ef | Longitudinal dispersion due to residual circulation in ebb and flood channels [L 2/T] | |
| D i | Damping term (Chapter 3) [-] | |
| D g | Longitudinal dispersion due to gravitational circulation [L 2/T] | |
| D SS | Steady state dispersion [L 2/T] | |
| D t | Tide driven dispersion [L 2/T] | |
| D 50 | Diameter of the bed material that is exceeded by 50% of the sample weight [L] | |
| e p | Pumping efficiency: relative difference of the tidal velocity amplitude between flood and ebb currents [-] | |
| E | Tidal excursion [L] |