Ocean Engineering Division, Council of Scientific and Industrial
Research – National Institute of Oceanography (CSIR-NIO), Dona
Paula, Goa, 403 004, India
Received: 24 Sep 2016 – Revised: 18 Nov 2016 – Accepted: 28 Nov 2016 – Published: 16 Dec 2016
Abstract. Assessment of wave power potential at different water depths and time is required for identifying a wave power plant location. This study examines the variation in wave power off the central west coast of India at water depths of 30, 9 and 5 m based on waverider buoy measured wave data. The study shows a significant reduction ( ∼ 10 to 27 %) in wave power at 9 m water depth compared to 30 m and the wave power available at 5 m water depth is 20 to 23 % less than that at 9 m. At 9 m depth, the seasonal mean value of the wave power varied from 1.6 kW m−1 in the post-monsoon period (ONDJ) to 15.2 kW m−1 in the Indian summer monsoon (JJAS) period. During the Indian summer monsoon period, the variation of wave power in a day is up to 32 kW m−1. At 9 m water depth, the mean annual wave power is 6 kW m−1 and interannual variations up to 19.3 % are observed during 2009–2014. High wave energy ( > 20 kW m−1) at the study area is essentially from the directional sector 245–270° and also 75 % of the total annual wave energy is from this narrow directional sector, which is advantageous while aligning the wave energy converter.
Amrutha, M. M. and Sanil Kumar, V.: Spatial and temporal variations of wave energy in the nearshore waters of the central west coast of India, Ann. Geophys., 34, 1197-1208, doi:10.5194/angeo-34-1197-2016, 2016.