MIKE 21/3 Sand Transport

Full spectrum sand transport modelling

Analyse the effects of sedimentation on coastal and estuarine infrastructure using our specialised software designed to simulate erosion, transport and deposition of non-cohesive sediment due to currents or waves.

Why MIKE 21/3 Sand Transport?

Uniquely calculate sand transport due to pure currents or combined waves and currents

With this pioneering intra-wave sand transport model, you can calculate sand transport due to the combined effect of waves and currents. The integrated wave boundary layer approach allows you to describe the movement of sand in the model. Include lag effects from the flow and the suspended load in the morphological development when basing calculations on pure currents.


Watch how the add-on shoreline morphology module can be used to forecast port sedimentation over a multi-year period

Model complex sediment transport processes and shoreline morphology with ease

Erosion and deposition of sand creates challenges for coastal and port engineering in regard to beach development and conservation, maintenance of harbour depths and control of sediment spreading from dredging operations. Incorporate the add-on module, MIKE 21 Shoreline Morphology, to create a combined shoreline / sediment transport model. Make long-term predictions of shoreline morphology and better understand the impact of sedimentation on complex coastal structures.

Perform dynamic coupled modelling including hydrodynamics and waves

Analyse sediment transport patterns around structures or near tidal inlets by coupling MIKE 21/3 Sand Transport with MIKE 21/3 Hydrodynamics and MIKE 21 Spectral Waves.


Rely on the Sand Transport module to support your key initiatives

Coastal Engineering

Assess the impact of a major coastal project such as a port or coastal protection scheme on erosion and sedimentation.

Port Design

Understand the currents, waves and sediment transport in key port areas to inform the design of sediment management strategies.

Oil & Gas

Simulate the effects of erosion over buried (subsea) pipelines to support design and mitigation efforts.

Coastal & Offshore Constructors

Determine the potential impact of sediment transport from offshore or coastal structures as part of an Environmental Impact Assessment.


Model the dynamic effects of maintaining a certain depth of a navigation channel and the amount of dredging necessary.

No in-house modellers?

DHI offers comprehensive modelling and consulting services in support of coastal and estuarine infrastructure project development and environmental impact mitigation.

Additional capabilities & unique features

Use MIKE 21/3 Sand Transport to determine the consequences of different orientations of a beach, the division of a beach into sections and possible structures to support the beach and expected maintenance. Simulations can be designed to cover a period of one or more years and to account for extreme storm conditions.

A key component of an Environmental Impact Assessment is the ability to demonstrate a solid understanding of the impact of a project upon regional and local morphological processes, ecology and habitats including mangroves, sea grass beds, organisms and endangered species. With MIKE 21/3 Sand Transport, you can effectively describe, assess and simulate the present and future coastal morphology and dominant coastal processes.

Coastal environments are transient and continuously reshaped by the natural forces of waves, tides, storm surges, erosion and deposition. To be sustainable, coastal development requires a clear understanding of, and respect for, these natural processes. MIKE 21/3 Sand Transport can be used to identify the best solutions to mitigate the impact of erosion on beaches and at ports and tidal inlets.

Use the Sand Transport module on all scales, from regional areas (10 kilometres) to local areas around coastal structures, where resolutions down to metres are needed. The software is designed to span the gap from the river to the coastal zone.

Take advantage of this capability using the built-in Dune Erosion Model.

You may choose to include a varying layer thickness as start condition for the simulation. This option is useful when simulating sand transport in areas with rock bed present (i.e. cases with non-erodible bed and limited sand supply).

Point sources of suspended sediment are important in many applications such as the release of sediments from rivers, intakes and outlets from cooling water or desalination plants. In MIKE 21/3 Sand Transport, the source concentrations of each component in every sources point can be specified individually as either specified concentration or excess concentration.

Specify bed level sources to simulate the effect of nourishments or dredging on morphology. You can also specify maintenance dredging to keep a certain water depth in a navigation channel and to dispose the dredged sediment in a specific area.

MIKE 21/3 Sand Transport takes advantage of the efficient parallelisation techniques implemented in MIKE 21 for the use of multiple cores and GPUs. Special techniques have also been developed to enhance calculation speed within the morphological modelling.

Ready to get started?

Request a free trial of MIKE 21/3 Sand Transport or ask us for more details on how your project can benefit from this full spectrum sand transport modelling software.