Proposal of Parameter Range that Offered Optimal Performance in the Coastal Morphodynamic Model (XBeach) Through GLUE
The process-based XBeach model has numerous empirical parameters because of insufficient understanding of hydrodynamics and sediment transport on the nearshore; hence, it is necessary to calibrate parameters to apply to various study areas and wave conditions. Therefore, the calibration process of p...
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| Format: | Article |
| Language: | English |
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The Korean Society of Ocean Engineers
2022-08-01
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| Series: | 한국해양공학회지 |
| Subjects: | |
| Online Access: | https://doi.org/10.26748/KSOE.2022.013 |
| _version_ | 1817993247023169536 |
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| author | Hyunwoo Bae Kideok Do Inho Kim Sungyeol Chang |
| author_facet | Hyunwoo Bae Kideok Do Inho Kim Sungyeol Chang |
| author_sort | Hyunwoo Bae |
| collection | DOAJ |
| description | The process-based XBeach model has numerous empirical parameters because of insufficient understanding of hydrodynamics and sediment transport on the nearshore; hence, it is necessary to calibrate parameters to apply to various study areas and wave conditions. Therefore, the calibration process of parameters is essential for the improvement of model performance. Generally, the trial-and-error method is widely used; however, this method is passive and limited to various and comprehensive parameter ranges. In this study, the Generalized Likelihood Uncertainty Estimation (GLUE) method was used to estimate the optimal range of three parameters (gamma, facua, and gamma2) using morphological field data collected in Maengbang beach during the four typhoons that struck from September to October 2019. The model performance and optimal range of empirical parameters were evaluated using Brier Skill Score (BSS) along with the baseline profiles, sensitivity, and likelihood density analysis of BSS in the GLUE tools. Accordingly, the optimal parameter combinations were derived when facua was less than 0.15 and simulated well the shifting shape, from crescentic sand bar to alongshore uniform sand bars in the surf zone of Maengbang beach after storm impact. However, the erosion and accretion patterns nearby in the surf zone and shoreline remain challenges in the XBeach model. |
| first_indexed | 2024-04-14T01:37:26Z |
| format | Article |
| id | doaj.art-2dd5befd9bd94c0389e3d09b15582002 |
| institution | Directory Open Access Journal |
| issn | 1225-0767 2287-6715 |
| language | English |
| last_indexed | 2024-04-14T01:37:26Z |
| publishDate | 2022-08-01 |
| publisher | The Korean Society of Ocean Engineers |
| record_format | Article |
| series | 한국해양공학회지 |
| spelling | doaj.art-2dd5befd9bd94c0389e3d09b155820022022-12-22T02:19:54ZengThe Korean Society of Ocean Engineers한국해양공학회지1225-07672287-67152022-08-0136425126910.26748/KSOE.2022.013Proposal of Parameter Range that Offered Optimal Performance in the Coastal Morphodynamic Model (XBeach) Through GLUEHyunwoo Bae0https://orcid.org/0000-0002-4104-7986Kideok Do1https://orcid.org/0000-0001-7364-8375Inho Kim2https://orcid.org/0000-0003-3466-588XSungyeol Chang3https://orcid.org/0000-0003-4641-4383Korea Maritime and Ocean UniversityKorea Maritime and Ocean UniversityKangwon National UniversitHaeyeon Engineering and Consultants CorporationThe process-based XBeach model has numerous empirical parameters because of insufficient understanding of hydrodynamics and sediment transport on the nearshore; hence, it is necessary to calibrate parameters to apply to various study areas and wave conditions. Therefore, the calibration process of parameters is essential for the improvement of model performance. Generally, the trial-and-error method is widely used; however, this method is passive and limited to various and comprehensive parameter ranges. In this study, the Generalized Likelihood Uncertainty Estimation (GLUE) method was used to estimate the optimal range of three parameters (gamma, facua, and gamma2) using morphological field data collected in Maengbang beach during the four typhoons that struck from September to October 2019. The model performance and optimal range of empirical parameters were evaluated using Brier Skill Score (BSS) along with the baseline profiles, sensitivity, and likelihood density analysis of BSS in the GLUE tools. Accordingly, the optimal parameter combinations were derived when facua was less than 0.15 and simulated well the shifting shape, from crescentic sand bar to alongshore uniform sand bars in the surf zone of Maengbang beach after storm impact. However, the erosion and accretion patterns nearby in the surf zone and shoreline remain challenges in the XBeach model.https://doi.org/10.26748/KSOE.2022.013xbeachgluemaengbang beachquantizationuncertaintyobjective calibration |
| spellingShingle | Hyunwoo Bae Kideok Do Inho Kim Sungyeol Chang Proposal of Parameter Range that Offered Optimal Performance in the Coastal Morphodynamic Model (XBeach) Through GLUE 한국해양공학회지 xbeach glue maengbang beach quantization uncertainty objective calibration |
| title | Proposal of Parameter Range that Offered Optimal Performance in the Coastal Morphodynamic Model (XBeach) Through GLUE |
| title_full | Proposal of Parameter Range that Offered Optimal Performance in the Coastal Morphodynamic Model (XBeach) Through GLUE |
| title_fullStr | Proposal of Parameter Range that Offered Optimal Performance in the Coastal Morphodynamic Model (XBeach) Through GLUE |
| title_full_unstemmed | Proposal of Parameter Range that Offered Optimal Performance in the Coastal Morphodynamic Model (XBeach) Through GLUE |
| title_short | Proposal of Parameter Range that Offered Optimal Performance in the Coastal Morphodynamic Model (XBeach) Through GLUE |
| title_sort | proposal of parameter range that offered optimal performance in the coastal morphodynamic model xbeach through glue |
| topic | xbeach glue maengbang beach quantization uncertainty objective calibration |
| url | https://doi.org/10.26748/KSOE.2022.013 |
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