Because the flow characteristics of cohesive (fine silt and partly organic material) and non-cohesive material (sand) are not the same, different approaches for computing the transport rates are applied: MORFIN-SAND and MORFIN-SILT. For areas with both sand and silt the module SAND-SILT is available.

Based on the computed flow and wave field, MORFIN computes sediment concentrations, causing local sedimentation or erosion. After the bottom levels are updated with these erosion and sediment figures, the new flow field is assessed, and above-mentioned steps are repeated throughout the computations.

Examples of MORFIN-output are the sedimentation and hence anticipated dredging volumes in approach channels and harbour basins, or scour hole estimates at the toe of a breakwater. Natural developments of tidal estuaries can also be predicted.

Main features
Sediment transport processes, cohesive and non-cohesive sediment, scour and siltation, dynamic response of the seabed.