In suspension, fine grained sediment may shadow areas over a time span, which can be critical for the survival of light-depending benthic flora and fauna. It may also deposit in areas where deposition is unwanted, for instance harbour inlets. Furthermore, pollutants are prone to adhere to cohesive sediment. If deposited in ecologically sensitive areas, it may affect the local flora and fauna and water quality in general. MIKE 21/3 MT can be used to analyse the effect of sedimentation on vegetation, biology and sediment inhomogenity to mitigate these concerns.

Apply MIKE 21 Spectral Waves (SW) to calculate the influence of waves on erosion deposition patterns.

Point sources of dissolved and/or suspended components are important in many applications such as the release of sediments from rivers, intakes and outlets from cooling water or desalination plants. With MIKE 21/3 MT, you can specify source concentrations individually as either specified concentration or excess concentration.

If the morphological changes within the area of interest are expected to be comparable to the water depth in certain areas, this software can take the morphological impact on the hydrodynamics into consideration. Typical areas where this is necessary are shallow areas where long term effects are being considered or dredging/dumping sites in shallow areas.

If several bed layers are used, a transition rate can be applied. This will cause sediment from the top layers to be transferred to the subsequently lower layers.

MIKE 21/3 MT 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.

MIKE 21/3 MT is based on a multi-bed layered approach where each layer is described by a critical shear stress for erosion, erosion coefficient, power of erosion, density of dry sediment and erosion function. The bed layers can be soft and partly consolidated or dense and consolidated. Consolidation is included as a transition rate of sediment between the layers and liquefaction by waves is included as a weakening of the bed due to breakdown of the bed structure.