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Filename SAND2014-18207.pdf
Filesize 4 MB
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Date added December 16, 2015
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Category Energy Efficiency, Energy Storage, Marine Hydrokinetic (MHK), Renewable Energy, Resource Assessment, Water Power, Wave Energy
Tags SAND2014-18207
author Dallman, Ann R.; Neary, Vincent
year 2014
location Albuquerque, NM
report-id SAND2014-18207
slide_template default

Spatial variability of sea states is an important consideration when performing wave resource assessments and wave resource characterization studies for wave energy converter (WEC) test sites and commercial WEC deployments. This report examines the spatial variation of sea states offshore of Humboldt Bay, CA, using the wave model SWAN. The effect of depth and shoaling on bulk wave parameters is well resolved using the model SWAN with a 200 m grid. At this site, the degree of spatial variation of these bulk wave parameters, with shoaling generally perpendicular to the depth contours, is found to depend on the season. The variation in wave height, for example, was higher in the summer due to the wind and wave sheltering from the protruding land on the coastline north of the model domain. However, the spatial variation within an area of a potential Tier 1 WEC test site at 45 m depth and 1 square nautical mile is almost negligible; at most about 0.1 m in both winter and summer. The six wave characterization parameters recommended by the IEC 62600-101 TS were compared at several points along a line perpendicular to shore from the WEC test site. As expected, these parameters varied based on depth but showed very similar seasonal trends.