Extended Data Table 4.

Model parameters for modern situation of the selected estuaries used in the analytical model of tidal wave propagation based on⁷⁴

Parameters include channel depth (h), convergence length (L_b), intertidal fraction (β), tidal amplitude at the mouth (a₀), friction number (r^*), convergence number (λ_e), and amplification number (κ_i). The amplification number κ_i is the imaginary part of the complex wave number and directly relates to tidal amplification (κ_i > 0) or damping (κ_i < 0). All values are computed assuming a uniform Chézy coefficient of 20m^1/2/s.