SMS:ADH Model Control Model Parameters
General model parameters are set is the ADH Model Control dialog (ADH | Model Control... command). It is accessed in the ADH Model Control dialog by clicking on the Model Parameters tab.
The model parameters window is divided into three sections:
- Wind Stations
- Density effects
- Bendway correction
Each of these sections are described below.
The ADH model includes the ability to simulate the effects of salinity and temperature on flow. This section includes two check boxes to activate these options.
Salinity (CN SAL Card)
- The Include salinity check box with the associated reference concentration allows turning on the simulation of salinity and define a positive non-zero real number for the background or reference concentration . The concentration is specified in parts per thousand.
Temperature (CN TMP Card)
- The Include temperature check box with the associated Reference temperature allows turning on the inclusion of temperature effects in the simulation of specify a positive non-zero real number which correlates to the CN TMP card reference temperature. The temperature is measured in degrees.
Bendway Correction (CN VOR Card)
The SW2 option in ADH simulates two-dimensional flow. However, some three dimensional effects can be approximated. This includes a method for correcting for the effects of vorticity around bends. Selecting the Include vorticity check box will cause SMS to add this card and activate this feature. It also adds the OP TRN card since vorticity is simulated in ADH as a transport constituent.
When the feature is active, it's necessary to specify three coefficients. These include the As and Ds empirical coefficients determined by integrating against measured values (defaults of 5.0 and 0.5) and a normalization factor.
The Override empirical coefficients toggle activates the edit fields for the other coefficients. If the option is unchecked, the coefficients will be reset to the default values. Zero values for both coefficients will assume the default values. Currently it is not recommended to override the empirical coefficients.
Wind Stations (XYC Cards)
Wind can be included in a number of ways in an ADH simulation. These include on a material by material basis described in a different section. The Include wind stations (defined on spatial data coverage) check box specifies that wind shear stress should be included in the simulation, computed from a set of spatially defined wind stations. This check box is only available if at least one spatial data coverage exits. In the spatial data coverage define a set of wind gages (defined as feature points) with time series of wind data associated.
If more than one spatial data coverage is defined, the associated Select... button undims and a single set of wind data can be selected for the current simulation. Clicking on the Select... button opens the Select Coverage window which lists all available spatial data coverages.
SMS will write an XYC card for each wind station. This card defines the curve containing the wind data and the location of the station.
Specify curve fit tolerance check box and the associated positive integer edit field specify whether a tolerance for all wind time series is included and its value. These controls are enabled only if a coverage is selected (the tolerance check box must also checked to enable the edit field).
For more information see Wind Stations.
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