RIASSUNTO
ABSTRACT
Wave in the water of western Bay of Bengal was hindcasted using nesting SWAN system for the first time for the cyclone Thane during 25-30 December, 2011. The model results were validated by measured buoy data of Pondicherry and BD11. Simulation results showed reasonable agreement with the measured data. The distance between cyclone center locations and buoys influences the significant wave height (Hs) variation. The Hs on the right side of the cyclone track is higher due to the effect of cyclone properties, and the Hs variation depend on the wind intensity and translation speed of cyclone.
INTRODUCTION
The oceans and the atmosphere strongly connect in forming the ocean surface dynamic. Extreme wind waves generated by tropical cyclones cause storm surges and coastal flooding depend on cyclone intensity and the center speed of the cyclone during landfall, and they devastate human life, property, ecosystem, and infrastructure. The sustainable development of economic activities in coastal and offshore region is associated with capability of monitoring and predicting long-term data about the marine environment condition such as wind-generated waves. The information of wave and wave climate at a location is great importance to estimate the action of waves on constructions of coastal and offshore engineering projects, tourism, fishery and shipping (Amrutha et al., 2016). Wave climate prediction can generally be conducted by hindcasting and forecasting because hindcasting helps to realize the wave characteristics of an area, whereas forecasting helps to forewarn the sea situation in the near future (Kazeminezhad and Ghavanini, 2015). The cyclone induced waves are high and complex ocean waves due to the rapidly varying in intense wind speed and wind direction and can propagate thousands of kilometers away from the center of the storm (Sirisha et al., 2015). Waves generated by cyclones typically comprise combined wind-seas and swells (Panigrahi et al., 2012).