SMS:TUFLOW Material Properties

File:TUFLOW MP.jpg

TUFLOW Material Properties dialog

Material properties include roughness and hydrologic losses (if used). TUFLOW uses a manning n value for roughness which can be specified as a single parameter or it can vary with depth. Hydrologic losses include an initial loss (in mm) and a continuing loss rate (in mm/hr). Hydrologic losses are generally only necessary when using direct rainfall on the model domain.

Material Sets

Multiple definitions of material properties can exist in a project. Each definition includes the material properties for each material in SMS and is referred to as a material set or material coverage. A material set can represent roughness for different conditions such as winter/summer conditions or can be used in a sensitivity analysis.

To build a material set, the TUFLOW simulation must already be built. Right-click on the Project Explorer "Material Set" item under the TUFLOW simulation and choose the New Material Set command. A "Material Set" item will appear in the Project Explorer.

Editing Material Properties

Material properties can be edited by right-clicking on the "Material Set" item in the TUFLOW simulation and choosing Properties. This will bring up the TUFLOW Material Properties dialog.

Material Properties Dialog Description

The TUFLOW Materials Properties dialog lists all materials created in the Materials Data dialog. Each material can be selected. After selecting a material from the list, definitions can be added. The following definitions are available:

• Manning's n – this has two options: "Single Value" and "Roughness by Depth"
• Provide hydrologic losses
• Storage reduction factor