Sediment transport introduction¶
This document describes the 1D computational engine for modelling sediment transport and morphological changes.
The sediment transport (ST) module simulates the transport of sediment and the corresponding changes in morphology. The ST module uses the same time step as the HD module and always runs concurrently. The ST module can handle cohesive (mud) and non-cohesive (sand/gravel) components.
Generally, sediment transport can be divided into bed load, suspended load, and wash load. Bed load is the transport of bed material by rolling and sliding along the bed. Suspended load is the material, which is suspended in the fluid part of the time. Wash load is the transport of material continually in suspension and therefore morphologically inactive. In MIKE 1D non-cohesive sediments can behave both like bed load and suspended load. Cohesive sediments behave as suspended load, while wash load can be implemented by setting zero erosion and deposition parameters, or by use of an AD component.
The ST module can be enabled from MIKE HYDRO and from MIKE+. It does not support MIKE 11 ST or MIKE URBAN (classic) systems.
Modelling of the morphological development in rivers and sewers is supported through three different bed layer models. This enables interaction between the bed and the hydrodynamics in both a river and a sewer context.
Product-specific text¶
Some passages apply only to one product context. Those passages appear in tabs throughout this documentation — select the product you use and the choice is applied to every page:
Text on a MIKE HYDRO tab is only relevant in a river context, i.e. for people using MIKE HYDRO.
Text on a MIKE+ tab is only relevant in an urban context, i.e. for people using MIKE+.