Journal d'océanographie et de recherche marine
Libre accès

Abstrait

Assessment of Wave Energy Potential along the Erosion Prone Coast at Ullal, Karnataka

Amit Dhawade*, Kiran Barve, LR Ranganath, Pradnya Dixit

The current situation of energy demand around the world is highly unbalanced due to the diminution of conventional energy sources such as coal, fossil fuels, and nuclear energy sources. It is essential to employ renewable and pollution free green energy resources as replacement to the conventional ones. The wave energy (ocean energy) is a promising renewable and green energy resource. In the present study Wave Power assessment at Ullal coast, Karnataka for South West monsoon, June to September 2005 is presented. The wind and wave dataset for a year 2005 was obtained from ESSO-INCOIS. The third-generation spectral wave model MIKE 21 SW is used to simulate wave transformation from offshore to the near shore. The model is calibrated with the measured dataset near Ullal coast, Karnataka and the correlation coefficient of 0.89991 is found. The temporal and spatial distribution of wave power was obtained. From these wave energy potential maps, locations for detailed analysis of available wave energy were identified. Three beaches Subhashnagar, Mogaveera patna and Kotepura, adversely affected by severe wave attack are considered for the further analysis. It is found that the average wave power in SW monsoon at 6 m depth and 9 m depth at these locations is of the order of 17 kW/m and 21 kW/m respectively. This estimate is quite comparable with the wave energy potential of the probable wave energy sites on the west coast of India such as Kanhangad, Kudal, Pawas, etc. With the installation of Wave energy converters, wave energy reaching the coast is reduced significantly. The coastal erosion will remain under control. Dual purpose of wave Energy extraction and coastal protection can be achieved by installing suitable wave energy converters at the site.