In this study, the impacts of tides, ocean waves, and sea dikes on coastal flooding in Thanh Hoa Province caused by storm surge in combination with tides were evaluated using simulated flooding results for Typhoon Doksuri (September 2017). The simulations were conducted with the SuWAT numerical model, in which tide, wave, and storm surge processes were integrated. The SuWAT model was developed using a moving-boundary algorithm to simulate flooding driven by tidal variations and storm surges. The