Geoscientific Model Development
Geoscientific Model Development
GMD
Articles | Volume 18, issue 19
Articles | Volume 18, issue 19
https://doi.org/10.5194/gmd-18-7199-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-18-7199-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 19
Development and technical paper
 | 
14 Oct 2025
Development and technical paper |  | 14 Oct 2025

The discontinuous Galerkin coastal and estuarine modelling system (DGCEMS v1.0.0): a three-dimensional, nonsplit-mode, implicit–explicit Runge–Kutta hydrostatic model

Zereng Chen, Qinghe Zhang, Guoquan Ran, and Yang Nie

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Short summary
This study presents the development of a novel three-dimensional discontinuous Galerkin coastal and estuarine modelling system named DGCEMS. The model has low spurious mixing and second-order convergence of surface water elevation, horizontal velocity, and the tracer field. It has the capability to simulate salt–freshwater interactions in the presence of wetting and drying boundaries.
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