CMS-Flow Multiple-sized Sediment Transport

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.

General Parameters

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

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

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.
BED_COMPOSITION_INPUT	CHARACTER	D50_SIGMA | D16_D50_D84 | D35_D50_D90 | HISTOGRAM | FRACTION_DATASET	Selects the method for specifying the bed material composition.
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.
D16_DATASET	CHARACTER	none
D35_DATASET	CHARACTER	none
D50_DATASET	CHARACTER	none
D84_DATASET	CHARACTER	none
D84_DATASET	CHARACTER	none
SEDIMENT_STANDARD_DEVIATION	REAL
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]
SEDIMENT_SIZE_CLASS_FRACTIONS	INTEGER [REAL, REAL,..., REAL]
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]
MIXING_LAYER_CONSTANT_THICKNESS	INTEGER [REAL, REAL,..., REAL]
MIXING_LAYER_MIN_THICKNESS	INTEGER [REAL, REAL,..., REAL]
BED_LAYERS_CONSTANT_THICKNESS	INTEGER [REAL, REAL,..., REAL]

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