Numerical Modelling of Cyclone-induced Waves Using WAVEWATCH III model

Mohammad Hossein Kazeminezhad, Farrokh Alavian Ghavanini

Monday 29 june 2015

17:54 - 17:57h at Amazon (level 1)

Themes: (T) Water engineering, (ST) Coastal engineering, Poster pitches

Parallel session: Poster pitch: 3C. Coastal Engineering

Wind waves are one of the most substantial marine hydrodynamics phenomena and its prediction is of great importance. Nowadays, numerical models such as WAVEWATCH III™ (WWIII) are comprehensively used for modelling and predicting deep water waves. Different methods have been included in WWIII for modelling of the wind-sea interaction and wave dissipation in deep water. Using each of these methods in wave modelling led to part¬ly various results. In this research, the capability of WWIII model has been evaluated in simulation of cyclone induced waves. The Nilofar cyclone which was generated in the Arabian Sea on October 25th, 2014 was considered and the wave fields were simulated in the northwestern Indian Ocean using WWIII numerical model. Simulations were carried out using different parameterizations in model including Tolman and Chalikov, BJA, Bidlot and WAM4. To do so, NCEP/GFS global model forecast wind data has been used. Then, the simulated wave heights obtained from different parameterizations were compared in a specified station. Results indicated that all of the parameterizations lead to similar values for wave direction; while, there are some discrepancies in the simulated wave heights obtained from different parameterizations. Finally, the simulated significant wave heights were compared with the altimetry data from JASON-2 satellite and performance of each parameterization for simulation of significant wave height was determined.