Presentation Abstract

There have been on-going efforts for increasing coastal resilience to the risk of coastal inundation as a result of sea-level rise in Washington. Accurate coastal risk projection depends on detailed and accurate information of sea level rise, including waves and storm surge induced by windstorms. This paper presents a modeling study simulating wind-induced waves in the Salish Sea. A nested-grid modeling approach was used to provide accurate and robust model simulations at various scales. The NOAA NCEP’s WaveWatch III (WW3) model is configured at global and regional scales with wind forcing obtained from the Climate Forecast System Reanalysis (CFSR). For the Salish Sea and Washington outer coast, a high-resolution wave model is implemented with the Unstructured Simulating WAve Nearshore (UnSWAN) model. The Salish Sea wave model is driven by spectral open boundary conditions from the nested regional WW3 models. To further improve the model accuracy inside the Salish Sea, sea surface winds were obtained from a Weather Research and Forecasting (WRF) historical model simulation covering the entire west coast at a resolution of 6-km resolution. These were used to drive the Salish Sea UnSWAN model. Comparisons of model results with observed wave data at available buoy stations indicated that the model successfully reproduced the wave climates in the Salish Sea. Wave characteristics and exposure areas of large waves in the Salish Sea were analyzed based on model results simulated from 2011 to 2015.

Session Title

Integrated Coastal Climate Change Modeling for Salish Sea Planning: Part II

Keywords

Waves, Modeling, Extreme event

Conference Track

SSE5: Climate Change: Impacts, Adaptation, and Research

Conference Name

Salish Sea Ecosystem Conference (Seattle, WA : 2018)

Document Type

Event

SSEC Identifier

SSE5-230

Start Date

6-4-2018 1:30 PM

End Date

6-4-2018 1:45 PM

Type of Presentation

Oral

Contributing Repository

Digital content made available by University Archives, Heritage Resources, Western Libraries, Western Washington University.

Geographic Coverage

Salish Sea (B.C. and Wash.)

Rights

This resource is displayed for educational purposes only and may be subject to U.S. and international copyright laws. For more information about rights or obtaining copies of this resource, please contact University Archives, Heritage Resources, Western Libraries, Western Washington University, Bellingham, WA 98225-9103, USA (360-650-7534; heritage.resources@wwu.edu) and refer to the collection name and identifier. Any materials cited must be attributed to the Salish Sea Ecosystem Conference Records, University Archives, Heritage Resources, Western Libraries, Western Washington University.

Type

text

Language

English

Format

application/pdf

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Apr 6th, 1:30 PM Apr 6th, 1:45 PM

Modeling wind-induced waves in the Salish Sea

There have been on-going efforts for increasing coastal resilience to the risk of coastal inundation as a result of sea-level rise in Washington. Accurate coastal risk projection depends on detailed and accurate information of sea level rise, including waves and storm surge induced by windstorms. This paper presents a modeling study simulating wind-induced waves in the Salish Sea. A nested-grid modeling approach was used to provide accurate and robust model simulations at various scales. The NOAA NCEP’s WaveWatch III (WW3) model is configured at global and regional scales with wind forcing obtained from the Climate Forecast System Reanalysis (CFSR). For the Salish Sea and Washington outer coast, a high-resolution wave model is implemented with the Unstructured Simulating WAve Nearshore (UnSWAN) model. The Salish Sea wave model is driven by spectral open boundary conditions from the nested regional WW3 models. To further improve the model accuracy inside the Salish Sea, sea surface winds were obtained from a Weather Research and Forecasting (WRF) historical model simulation covering the entire west coast at a resolution of 6-km resolution. These were used to drive the Salish Sea UnSWAN model. Comparisons of model results with observed wave data at available buoy stations indicated that the model successfully reproduced the wave climates in the Salish Sea. Wave characteristics and exposure areas of large waves in the Salish Sea were analyzed based on model results simulated from 2011 to 2015.