Details:

Journal Title:
Journal of Great Lakes Research
Personal Author:
Volpano, Chelsea A. ; Zoet, Lucas K. ; Elmo Rawling, J. ; Theuerkauf, E.J
Volpano, Chelsea A. ; Zoet, Lucas K. ; Elmo Rawling, J. ; Theuerkauf, E.J Less -
NOAA Program & Office:
Sea Grant ; OAR (Oceanic and Atmospheric Research)
Sea Grant ; OAR (Oceanic and Atmospheric Research) Less -
Sea Grant Program:
WISCU (Wisconsin Sea Grant)
Description:
Erosion by storms and high-water levels impacts large enclosed basins; however there have been few attempts to numerically model cumulative impacts in large lakes. Antecedent morphology is a large determinant of coastal sensitivity to storms, so capturing the beach recovery is important for overall vulnerability assessment. To study beach recovery, we apply the numerical model XBeach to simulate a period of low to moderate wave energy when beach recovery typically occurs. Surveys were conducted one month apart during summer of 2020 on the west coast of Lake Michigan and used to initiate model runs and evaluate model performance. XBeach was used to propagate offshore wave conditions from a Great Lakes Coastal Forecasting System (GLCFS) node ∼1 km offshore into the nearshore, and results were compared to measurements from a nearshore pressure sensor. We tested for the optimal value of the asymmetry/skewness parameter (facua) for model-data convergence. We evaluated model skill using a Mean Square Error Skill Score (MSESS) and a decomposition. In our repeat surveys we observed slight landward migration of longshore bars and the initiation of bar welding to the shoreline but, overall, changes in bathymetry were small. We found that XBeach transforms offshore waves well and sediment transport volume was accurately predicted by the model. However, XBeach did not capture the morphologic evolution under low energy conditions, preventing simulation of beach recovery. Overall, higher values of facua resulted in improved skill scores and modeled nearshore morphology that was more similar to the morphology measured in our surveys.
Keywords:
[+]
Beaches Erosion Sediment Storms
Source:
Journal of Great Lakes Research, 48(3), 633-644
DOI:
https://doi.org/10.1016/j.jglr.2022.03.012
ISSN:
0380-1330
Publisher:
Elsevier BV
Document Type:
Journal Article
Place as Subject:
Great Lakes (North America)
Rights Information:
Accepted Manuscript
Rights Statement:
This manuscript is made available under the Elsevier user license https://www.elsevier.com/open-access/userlicense/1.0/
Compliance:
Submitted
Main Document Checksum:
[+]
urn:sha256:0dfdb7c8159c4dcda9f0c13f1748d0df0da5cff8ad8b3081629cf06d2dc98303
Download URL:
https://repository.library.noaa.gov/view/noaa/51625/noaa_51625_DS1.pdf
File Type:

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