A surface porosity approach for eliminating artificial ponding in coastal salt marsh simulations

Hydrodynamic processes over marsh topography are significantly affected by surface defects such as cuts and rills on channel berms platforms. These meter-scale features often missing in the model representation due to spatial resolution available from data sources, well incomplete grid itself. To minimize artificial hydraulic isolation numerical models, we propose implementing an effective porosity algorithm considering fine-scale depressions that control drainage process. The modification is carried out eliminate ponding effects observed simulations Bombay Hook National Wildlife Refuge, DE, USA using original FVCOM code. Results revised models compared with pressure gauge collected isolated depression platform. new implementations for proper wetting drying efficient accurate hydrodynamic modeling inside a complex salt-marsh system, which constitutes major breakthrough context of increasing need better understanding physical morphological changes valuable coastal ecosystems.