Articles | Volume 18, issue 3
https://doi.org/10.5194/gmd-18-843-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-18-843-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Model description paper
| 
13 Feb 2025
Model description paper |
| 13 Feb 2025
| 13 Feb 2025
Subgrid corrections for the linear inertial equations of a compound flood model – a case study using SFINCS 2.1.1 Dollerup release
Maarten van Ormondt
Deltares USA, 8601 Georgia Ave, Silver Spring, MD 20910, USA
Tim Leijnse
Applied Morphology Department, Deltares, Boussinesqweg 1, 2629 HV Delft, the Netherlands
Roel de Goede
Applied Morphology Department, Deltares, Boussinesqweg 1, 2629 HV Delft, the Netherlands
Kees Nederhoff
CORRESPONDING AUTHOR
Deltares USA, 8601 Georgia Ave, Silver Spring, MD 20910, USA
Ap van Dongeren
Applied Morphology Department, Deltares, Boussinesqweg 1, 2629 HV Delft, the Netherlands
Coastal and Urban Risk & Resilience Department, IHE Delft, Westvest 7, 2611 AX Delft, the Netherlands
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Short summary
Accurate flood risk assessments are crucial for storm protection. To achieve efficiency, computational costs must be minimized. This paper introduces a novel subgrid approach for linear inertial equations (LIEs) with bed level and friction variations, implemented in the Super-Fast INundation of CoastS (SFINCS) model. Pre-processed lookup tables enhance simulation precision with lower costs. Validations show significant accuracy improvement even at coarser resolutions.
Accurate flood risk assessments are crucial for storm protection. To achieve...
