Sea and swell along west coast of India: Study based on measured data
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Separation of sea and swell from the measured data is important for studying the wind wave dynamics and in the design of coastal and offshore structures. The wave data collected using Datawell directional waverider buoy at a deep-water location and at shallow water location off the Goa coast during pre-monsoon period was used in the present study. Sea and swell components were separated for deep and shallow water locations and compared. The study shows that the conditions in the deep water are influenced by swell with 62%, whereas in the shallow water, the influence of wind seas with 68% is dominating in most of the period. The wind data shows that the wind direction was predominantly from sector between north to west at deep water and the sea was in the direction of the wind. Mean swell direction was 168 degrees at deep water and 187 degrees at shallow water. The spectra was narrow band in the deep water and relatively broad in the shallow water.
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