WMS:HSPF Impervious Land Segment

Clicking the Define Activities button in the Edit HSPF Attributes dialog when an impervious segment is selected will open the Impervious Land Activity dialog. To activate a module, click the toggle box in the Impervious Land Activity dialog box. This will activate the button that leads to the dialog box for that module. This dialog allows activation of the following modules:

ATEMP

To access the ATEMP Parameters dialog box, press the ATEMP button in the Pervious Land Activity dialog box. The ATEMP Parameters dialog box lets the user enter the parameters for the ATEMP input table: ATEMP-DAT. Note that the dialog for ATEMP input for PERLND and IMPLND segments is the same. For information on the definition and function of specific variables in this module, see Section 4.4(1).2 – ATEMP Input of the HSPF Manual.[1]

SNOW

To access the SNOW Parameters dialog box, press the SNOW button in the Pervious Land Activity dialog box. The SNOW Parameters dialog box lets the user enter the parameters for the following SNOW input tables: ICE-FLAG, SNOW-PARM1, SNOW-PARM2, SNOW-INIT1, and SNOW-INIT2. Note that the dialog for SNOW input for PERLND and IMPLND segments is the same. For information on the definition and function of specific variables in this module, see Section 4.4(1).3 – SNOW Input of the HSPF Manual.[2]

IWATER|IWATER

To access the IWATER Parameters dialog box, press the IWATER button in the Impervious Land Activity dialog box. The IWATER Parameters dialog box lets the user enter the main parameters for the following IWATER input tables: IWAT-PARM1, IWAT-PARM2, IWAT-PARM3, and IWAT-STATE1. The following monthly value tables may also be input from this dialog if required: MON-RETN, MON-MANNING. Some parameters require a single value for the entire simulation and others are allowed to vary monthly, depending on the flags set in the IWAT-PARM1 table. For information on the definition and function of specific variables in this module, see Section 4.4(2).4 – IWATER Input of the HSPF Manual.[3]

SOLIDS

To access the SOLIDS Parameters dialog box, press the SOLIDS button in the Impervious Land Activity dialog box. The SOLIDS Parameters dialog box lets the user enter the parameters for the following SOLIDS input tables: SLD-PARM1, SLD-PARM2, and SLD-STOR. The following monthly value tables may also be input from this dialog if required: MON-SACCUM, MON-REMOV. For information on the definition and function of specific variables in this module, see Section 4.4(2).5 – SOLIDS Input of the HSPF Manual.[4]

IQUAL

To access the IQUAL Parameters dialog box, press the include "global.sbh" button in the Impervious Land Activity dialog box. This dialog box allows the user to specify up to 10 water quality constituents or pollutants in the outflows from an impervious land segment. The IQUAL Parameters dialog box lets the user enter the parameters for the following IQUAL input tables: NQUALS, IQL-AD-FLAGS, QUAL-PROPS, QUAL-INPUT. The following monthly value tables may also be input from this dialog if required: MON-POTFW, MON-ACCUM, and MON-SQOLIM. Some parameters require a single value for the entire simulation and others are allowed to vary monthly, depending on the flags set in the QUAL-PROPS table. For more information on these tables, see Section 4.4(2).7 – IQUAL input of the HSPF manual.[5]

The key to using this dialog is to note that the NQUAL field at the top of the box designates the total number of constituents to be modeled, while the Editing Constituent Number drop-down box indicates the constituent that is available for editing in the fields below.

Related Topics

• Pervious Land Segment
• Basin Data
• Entering HSPF Parameters
• Reach/Reservoir Data