Application of wave–current coupled sediment transport models with variable grain properties for coastal morphodynamics: a case study of the Changhua River, Hainan

Wu, Yuxi; Zhao, Enjin; Li, Xiwen; Zhang, Shiyou

doi:https://doi.org/10.5194/os-21-473-2025

Articles | Volume 21, issue 1

https://doi.org/10.5194/os-21-473-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/os-21-473-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 1

Research article

|

13 Feb 2025

Research article |

| 13 Feb 2025

Application of wave–current coupled sediment transport models with variable grain properties for coastal morphodynamics: a case study of the Changhua River, Hainan

Yuxi Wu, Enjin Zhao, Xiwen Li, and Shiyou Zhang

Supplement

https://doi.org/10.5194/os-21-473-2025-supplement

Data sets

ERA5: Fifth generation of ECMWF atmospheric reanalyses of the global climate Copernicus Climate Change Service (C3S) https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-single-levels?tab=overview

ETOPO1 1 Arc-Minute Global Relief Model NOAA National Geophysical Data Center https://www.ncei.noaa.gov/access/metadata/landing-page/bin/iso?id=gov.noaa.ngdc.mgg.dem:316

Model code and software

An unstructured grid, finite-volume coastal ocean model: FVCOM User Manual C. S. Chen et al. http://fvcom.smast.umassd.edu

SWAN Cycle III Version 40.51 User Manual Deltares https://swanmodel.sourceforge.io/online_5doc/swanuse/swanuse.html

Short summary

A comprehensive sand transfer model is proposed to study sediment dynamics in the lower reaches of the Changhua River on the island of Hainan. It captures the complex relationship between wave action, ocean currents, and sediment transport. Validated on the basis of on-site measurements, the model reveals significant sediment deposits which are significantly affected by coastal ocean currents and geological structures.