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.

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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