Abstract
This study aims at improving the simulation of wind and waves during storms in
connection with wind turbine design and operations in coastal areas. For this particular purpose,
we investigated the Coupled-Ocean-Atmosphere-Wave-Sediment Transport (COAWST) Modeling
System which couples the Weather Research and Forecasting (WRF) Model with the thirdgeneration
ocean wave modelSWAN. This study investigates mainly two issues: spatial resolution
and the wind-wave interface parameter roughness length(z0). To study the impact of
resolution, the nesting function for both WRF and SWAN is used, with spatial resolution ranging
from 25km to 2km. Meanwhile, the atmospheric forcing data of dierent spatial resolution,
with one about 100km (FNL) and the other about 38km (CFSR) are both used. In addition,
bathymatry data of diferent resolutions (1arc-minute and 30arc-seconds) are used. We used
three approaches to parametrize z0. The results are validated through QuikScat data and point
measurements from an open ocean site Ekosk and a coastal, relatively shallow water site Horns
Rev. It is found that the modeling system captures in general better strong wind and strong wave
characteristics for open ocean condition than for the coastal condition. With the current model
setup, using high spatial resolution gives better results for strong winds both for the open ocean
and coastal sites. The signicant wave height (Hm0) is very sensitive to the model resolution
and bathymetry data for the coastal zone. In addition, using Janssen (1991) z0 expression gives
better results of the signicant wave hight under high sea state conditions.
Original language | English |
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Title of host publication | Proceedings of EWEA Offshore 2015 Conference |
Number of pages | 9 |
Publisher | European Wind Energy Association (EWEA) |
Publication date | 2015 |
Publication status | Published - 2015 |
Event | EWEA Offshore 2015 Conference - Bella Center, Copenhagen, Denmark Duration: 10 Mar 2015 → 12 Mar 2015 |
Conference
Conference | EWEA Offshore 2015 Conference |
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Location | Bella Center |
Country/Territory | Denmark |
City | Copenhagen |
Period | 10/03/2015 → 12/03/2015 |