New Model Reveals How Mangrove Root Structure Affects Wave Attenuation for Coastal Protection
Researchers have developed a generalised parametrisation of mangrove vegetation profiles and a wave attenuation model that accounts for root structure variation across species. The study used OpenFOAM computational fluid dynamics simulations to evaluate the model's hydrodynamic performance. The findings reveal a previously unrecognised mechanism by which mangrove root characteristics govern coastal protection, challenging classical vegetation models.
A study presented at the International Conference of Hydrodynamics (ICHD) 2026 introduces a new framework for modelling the hydrodynamic drag of mangroves as nature-based coastal protection systems. Many existing models neglect vertical variation in vegetation biomass, leading to oversimplified representations of how mangrove roots interact with water flow. The researchers developed a generalised parametrisation applicable across multiple mangrove species and derived a wave attenuation model that explicitly incorporates root characteristics. They also proposed a simplified mangrove representation suitable for both computational fluid dynamics simulations and physical experimental fabrication. Simulations conducted in OpenFOAM showed that wave attenuation effectiveness is both frequency-selective and species-dependent. This nonlinear behaviour contrasts with predictions from classical vegetation models and points to a previously unrecognised governing mechanism in coastal protection by mangroves.
What's missing
The study is a conference paper preprint and has not yet undergone formal peer review. The model's predictions have not been validated against field measurements or physical flume experiments with real mangrove specimens, which limits confidence in real-world applicability.
What different sources said
- arXiv physicsCenter
On the Modelling of the Hydrodynamic Drag of Mangroves
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