Routing Parameters

This method category is dependent upon the selection of Muskingum outing in the Routing category. It enables you to specify either the Muskingum K and X values or the C0, C1 and C2 coefficients. There is also the option of providing this data as a times series.

None

This is the default method. It performs no calculations. An error is posted in the beginning of the run if this method is selected.

Input K and X Values

This method is used to specify constant Muskingum K and X values.

Slots Specific to This Method

MuskingumCoefficientK

Type: Scalar Slot

Units: TIME

Description: lag time of the centroid of a flood wave

Information:

I/O: Required input

Links: Not linkable

MuskingumCoefficientX

Type: Scalar Slot

Units: NONE

Description: attenuation factor

Information:

I/O: Required input

Links: Not linkable

Method Details

The Muskingum Coefficient K and Muskingum Coefficient X are used to calculated the C0, C1 and C2 coefficients by the following equations:

where t is the simulation timestep, K[Time] and X[no units] are the Muskingum coefficients.

Input Coefficients

This method is used to input the characteristic Muskingum coefficients directly. The coefficients are not allowed to vary with time.

The values in the C0, C1, C2 Coefficients slot are used directly in the Muskingum routing calculations.

Slots Specific to This Method

C0 C1 C2 Coefficients

Type: Table

Units: NOUNITS

Description: a table containing the three characteristic Muskingum coefficients

Information: A value for each coefficient is given in the first three columns of the table.

I/O: Required input

Links: Not linkable

Input Time Series K and X

This method is used to specify time variable data for K and X.

Slots Specific to This Method

Muskingum K Time Series

Type: Series

Units: TIME

Description: lag time of the centroid of a flood wave

Information:

I/O: Required input

Links: Not linkable

Muskingum X Time Series

Type: Series

Units: NONE

Description: attenuation factor

Information:

I/O: Required input

Links: Not linkable

Method Details

The K value and X value are used to calculate the C0, C1, C2 coefficients by the following equations:

where t is the simulation timestep, K[Time] and X[no units] are the Muskingum coefficients.

Input Time Series Coefficients

This method is used to specify the characteristic Muskingum coefficients as a time series.

The C0, C1, C2 values are used directly in the Muskingum routing calculations.

Slots Specific to This Method

C0 Time Series

Type: Series

Units: NOUNITS

Description: a time series range of C0 values

Information:

I/O: Required input

Links: Not linkable

C1 Time Series

Type: Series

Units: NOUNITS

Description: a time series range of C1 values

Information:

I/O: Required input

Links: Not linkable

C2 Time Series

Type: Series

Units: NOUNITS

Description: a time series range of C2 values

Information:

I/O: Required input

Links: Not linkable

Revised: 08/02/2021