CMS-Flow Multiple-sized Sediment Transport

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Figure 1. CMS-Flow Model Control : Model Parameters tab in SMS 11.0.

All of the CMS-Flow model parameters, settings, and output options are controlled from the CMS-Flow Model Control window (Figure 1). The window has several tabs including the Flow tab in which most of the general settings are set for CMS-Flow. To open the CMS-Flow Model Control window, click on CMS-Flow | Model Control. The first tab will be the Flow tab. There are several sections within the tab including Time Control and Hot Start options.


Grain Size Specification

Card Arguments Default/Format Range Description
SEDIMENT_SIZE_CLASS_NUMBER INTEGER
MULTIPLE_GRAIN_SIZES INTEGER [REAL, REAL,..., REAL]
SEDIMENT_SIZE_CLASS_DIAMETERS INTEGER [REAL, REAL,..., REAL]
SEDIMENT_SIZE_CLASS_LIMITS INTEGER [REAL, REAL,..., REAL]

Fractional Bed Composition

Card Arguments Default/Format Range Description
BED_COMPOSITION_INPUT CHARACTER D50_SIGMA | D16_D50_D84 | D35_D50_D90 | HISTOGRAM | FRACTION_DATASET Selects the method for specifying the bed material composition.

D50 Dataset and Standard Deviation

Card Arguments Default/Format Range Description
D50_DATASET CHARACTER none
SEDIMENT_STANDARD_DEVIATION REAL

D16, D50, and D84 Datasets

Card Arguments Default/Format Range Description
D16_DATASET CHARACTER none
D50_DATASET CHARACTER none
D84_DATASET CHARACTER none


D35, D50, and D90 Datasets

Card Arguments Default/Format Range Description
D35_DATASET CHARACTER none
D50_DATASET CHARACTER none
D90_DATASET CHARACTER none

Histogram

Card Arguments Default/Format Range Description
SEDIMENT_SIZE_CLASS_FRACTIONS INTEGER [REAL, REAL,..., REAL]

Fractional Composition Dataset

Card Arguments Default/Format Range Description
BED_FRACTIONAL_COMPOSITION_DATASET CHARACTER CHARACTER [<grid file>] [<grid name>//"Datasets/<Name>"] Fractional bed composition file. Necessary when setting BED_COMPOSITION_INPUT to FRACTION_DATASET.

Bed Layer Thickness

Table 1. CMS-Flow cards related to the general parameters

Card Arguments Default/Format Range Description
BED_LAYER_THICKNESS_INPUT INTEGER [REAL, REAL,..., REAL]
BED_LAYER_THICKNESS_DATASET CHARACTER CHARACTER
BED_LAYERS_MAX_NUMBER INTEGER
BED_LAYERS_CONSTANT_THICKNESS INTEGER [REAL, REAL,..., REAL]
BED_LAYERS_THICKNESS INTEGER [REAL, REAL,..., REAL]
BED_LAYERS_CONSTANT_THICKNESS INTEGER [REAL, REAL,..., REAL]
BED_LAYERS_CONSTANT_THICKNESS INTEGER [REAL, REAL,..., REAL]

Mixing Layer

Card Arguments Default/Format Range Description
MIXING_LAYER_CONSTANT_THICKNESS INTEGER [REAL, REAL,..., REAL]
MIXING_LAYER_MIN_THICKNESS INTEGER [REAL, REAL,..., REAL]

Parameters

The general parameters are the water density and temperature. The CMS-Flow cards for the general parameters are described in the table below.

Card Arguments Default/Format Range Description
HIDING_EXPOSURE_COEFFICIENT REAL 1025 - Water density in kg/m^3.
HIDING_EXPOSURE_COEFF REAL 15 - Water temperature in degrees Celcius.




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