Interaction between storm surge and typhoon waves in the radial sandy ridge area during Typhoon Damery

Abstract

The radial sandy ridge area along the Jiangsu coast has a complex topography with many tidal creeks and emerged ridges, which may induce a significant interaction between surge and waves when a typhoon is passing through this area. In this study, the ADCIRC and SWAN models are used to simulate the storm surge and typhoon waves during the period of Typhoon Damery which occurred in 2010. The interaction between the surge and waves is studied by comparing the simulated results obtained from the coupled ADCRIC+SWAN and uncoupled ADCIRC and SWAN models. A cyclic increase-and-decrease of significant wave height is found near the typhoon landing area, with the maximum change in the order of 1m, due to the tide and surge effect. A notable increase in the surge level is found on the nearshore emerged ridges as the typhoon passing by, with the maximum change in the order of 0.1m, due to the wave effect. It is also found that the interaction between the storm surge and typhoon waves is less significant in tidal creeks due to their relatively large water depth.