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W ave energy resource in the P acific

W ave energy resource in the P acific. Spatial/temporal a nalysis of wave parameters. Cyprien Bosserelle , Tom Durrant , Sandeep Reddy, Jens Kruger . 19 th Nov 2013 Pacific Island Countries GIS and RS User Conference. Motivations. Why are we studying waves?.

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W ave energy resource in the P acific

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  1. Wave energy resource in the Pacific Spatial/temporal analysis of wave parameters CyprienBosserelle, Tom Durrant, Sandeep Reddy, Jens Kruger 19th Nov 2013 Pacific Island Countries GIS and RS User Conference

  2. Motivations Why are we studying waves? • Coastal hazards (inundation, erosion) • Hazard mitigation • Coastal planning and development • Disaster management • Water and sanitation

  3. Motivation Wave energy could play an important role in the development of Pacific Island nations How reliable is wave energy in the region and where to install what device?

  4. Method: Wave hindcast • Simulation of waves in the past • Global to regional scale • 1979 to 2013 • Wave Watch III model (State of the art wave simulation) • Wind from NOAA-CFSR reanalysis • Hourly wind hindcast • High spatial resolution (0.3deg) • Includes cyclones (crude)

  5. Method: Nearshore wave hindcast • Simulation of waves in the past using the global wave hindcast • Fine scale (100-300Km) • Simulating Wave Nearshore (SWAN) • Selected locations: • Western Samoa • Tongatapu (Tonga) • Fiji (VitiLevu, Kadavu) • Efate (Vanuatu) • Funafuti (Tuvalu) • Rarotonga (Cook Islands)

  6. Wave height of the global ocean m

  7. Complex wave climate Many wave generation areas; many islands Number of wave systems present

  8. Mean wave height North Pacific swells m Southern Ocean swells

  9. Reliability of wave height Wave height exceeded 90% of the time m

  10. Mean available wave power kW/m

  11. Importance of local bathymetry kW/m Wide continental shelf Narrow/no continental shelf

  12. Samoa nearshore bathymetry Depth (m)

  13. Wave height Hotspots m

  14. Wave height Hotspots m

  15. Take home messages • Wave climate in the Pacific region is one of the most complex in the world • Wave energy is reliable and a commercially viable resource in most of the region (except PNG, Solomon) • Offshore assessment can be realistic for islands with steep offshore slopes but nearshore analysis is need for larger island with gentler slopes Future Work • Local wave energy and hotspot for 6 islands of the Pacific region • Simulation of the energy output of: • Wave Oyster • Palamis • CETO • Cost-benefit assessement

  16. Thank you

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