1. STWAVEWave Modelling byyvind LeikvinSual, Panabo and Lamon Bay28.01.2014 www.akvaplan.niva.no

2. STWAVE main properties assumes constant boundary forcings (wind and waves), and estimates a stationary solution (steady state) finite-difference model is capable of quantitively describing the change in wave parameters (wave height, period, direction and spectral shape) between the offshore and the nearshore28.01.2014 www.akvaplan.niva.no 3. STWAVE simulates Depth-induced wave refraction and shoaling Current-induced wave refraction and shoaling Depth-steepness-induced wave breaking Diffraction Wind-wave growth Wave-wave interaction Whitecapping Reflection 28.01.2014 www.akvaplan.niva.no 4. STWAVE modeling - Main input data Bathymetry (provided from oceanographic charts and own measurements) Wind speed in model domain (Long term wind-data extracted from meteorological measurements from the local area) Wave height at the ocean boundary (Long term offshore wave data retrieved from www.buoyweather.com, and are extracted from hindcast data from a global WAM wave model) Wave energy spectrum (default by the model/ defined by user) 28.01.2014 www.akvaplan.niva.no 5. STWAVE modeling; Panabo, Sual and Lamon bayModel setup Resolution: 100 * 100 m (nesting also possible, for zooming) Whole bays out to the offshore are covered Incoming wind and waves from the opening of the bays (offshore) 28.01.2014 www.akvaplan.niva.no 6. Results, Panabo A georeferenced picture/ map may be a placed as a background for the model plot A wave train and wind have been set up, entering the model domain from offshore (165). Typically the whole bay system and the boundary towards the open ocean will be covered 28.01.2014 www.akvaplan.niva.no 7. Significant wave height, Panabo (Hs) Red areas: 0-1 m Blue areas: 2 m (input wave at offshore: 2,1 m) Should look at winds and waves from all directions, as well as taking peak periods into account. Reveals possible places for aquaculture 28.01.2014 www.akvaplan.niva.no 8. Significant wave height (Hs), from different angles165 deg180 deg195 deg 210 deg28.01.2014 www.akvaplan.niva.no 9. The STWAVE model also simulates the directional spreading of the waves into the bay:28.01.2014 www.akvaplan.niva.no 10. Results, Sual Wave Height (Hs) A wave train and wind are set up, entering the model domain from offshore, from about 320-340.28.01.2014 www.akvaplan.niva.no 11. Results, Lamon Bay Wave Height (Hs) A wave train and wind are set up, entering the model domain from offshore, from about 30-45.28.01.2014 www.akvaplan.niva.no 12. Why STWAVE : Finding new aquaculture sites28.01.2014 www.akvaplan.niva.no 13. How to use the wave modeling results: Finding new and appropriate areas for aquaculture Shelter (wind & waves) Depth Exposure classification (wave height) Choice of 28.01.2014cage technology structure design insurance www.akvaplan.niva.no 14. MARAMING SALAMAT ! 28.01.2014 www.akvaplan.niva.no