Materials¶
In MIKE+, a pipe is characterised by material, which determines the Manning friction coefficient (Manning M or Manning n), the Colebrook-White coefficient (EQ Roughness), or Hazen-Williams coefficient (H-W Coefficient) for the conduit. It is optional to use either the default roughness values for specific materials or local values.
2D overland surface roughness may also be mapped using specified material, when roughness varies in space with the option 'MIKE+ 2D surface roughness layer'.
Specification of the different kind of materials and roughness coefficients is done through the Materials editor (Tables | Materials).
Figure: Materials editor
MIKE+ has the following pre-defined Material types for pipes:
- Cement Mortar
- Ceramics
- Concrete (Normal)
- Concrete (Rough)
- Concrete (Smooth)
- Iron (cast)
- Iron (wrought)
- Plastic
- Stone
And the following pre-defined Material types for 2D overland surfaces:
- Forest
- Forest with dense undergrowth
- Grass
- Crops
- Plowed fields
- Pasture
- Meadow
- Urban area
- Dense urban area
- Roads
- Lakes.
| Edit field | Description | Used or required by simulations | Field name in datastructure |
|---|---|---|---|
| ID | Material type ID | Yes | MUID |
| Manning (M) | Manning (M) roughness value | Yes If ‘Manning (M)’ is used | Manning |
| Manning (n) | Manning (n) roughness value | Yes If ‘Manning (n)’ is used | ManningN |
| Equivalent roughness | Equivalent roughness | Yes If ‘Colebrook-White’ formulation is used | EQRough |
| Hazen-Williams coefficient | Hazen-Williams roughness coefficient | Yes If ‘Hazen-Williams’ is used | HWCoef |
| Description | User’s descriptive information on the material | Optional | Description |
Table: Overview of the Materials editor attributes (Table ms_Material)