One-line modelling of complex beach conditions: An application to coastal erosion at Hai Hau beach in the Red River Delta, Vietnam

The long-term shoreline evolution at Hai Hau Beach in the Red River Delta, Vietnam was simulated using the one-line model GENESIS (Hanson, 1989). Dikes were modelled as seawalls and the sediment continuity equation in GENESIS was modified to take into account the offshore transport of fine-grained sediment. The model performed well, reproducing the magnitude and trend of the long-term shoreline change. Additionally, a net shoreline transport to the southwest was calculated which is in agreement with observations and the estimates of local engineers