For given wave properties, the total longshore transport of sediment, Q, is determined as a function of the longshore position yc and the local coastline orientation ac.
With known values of local wave conditions at the breaker line (I, wl, T, Hb, and ab), the total longshore transport Q corresponding to the applied value of ac can be determined by interpolation in the transport tables. For each calculation point Xcal Q is found for different values of ac to provide a “discrete” Q(Xcal,a) relation, as shown in Figure 5.22.
The coastline evolution model calculates the Q-a curve in all grid points along the coastline.
Figure 5.22 Q(Xcal,a) for varying a
