WMS:HSPF Reach Reservoir Segment

The Reach/Reservoir Activity dialog allows activation of the following modules: HYDR, ADCALC, CONS, HTRCH, SEDTRN, RQUAL. To activate a module, click the toggle box in the Reach/Reservoir Activity dialog box. This will activate the button that leads to the dialog box for that module.

HYDR

To access the HYDR Parameters dialog box, press the HYDR button in the Reach/Reservoir Activity dialog box. The HYDR Parameters dialog box lets the user enter the parameters for the following HYDR input tables: HYDR-PARM1, HYDR-PARM2, and HYDR-INIT. The following monthly value tables may also be input from this dialog if required: MON-CONVF. Other tables used to set up “categories” to be simulated are not supported in WMS. Some parameters require a single value for the entire simulation and others are allowed to vary monthly, depending on the flags set in the HYDR-PARM1 table. For information on the definition and function of specific variables in this module, see Section 4.4(3).2 – HYDR Input of the HSPF Manual.[1]

In addition to the fields and buttons to edit HYDR input variables, a few other buttons exist in this dialog. The Print Info button leads to a dialog where the PRINT-INFO block for RCHRES segments may be set up (see Section 4.4(3).1.2 of the HSPF Manual). The Define FTABLE button leads to a dialog where the FTABLE for the selected reach/reservoir may be input (see Section 4.5 – FTABLES Input of the HSPF Manual). This functionality will also be discussed later.

ADCALC

To access the ADCALC Parameters dialog box, press the ADCALC button in the Reach/Reservoir Land Activity dialog box. The ADCALC Parameters dialog box lets the user enter the parameters for the ADCALC input table: ADCALC-DATA. For information on the definition and function of specific variables in this module, see Section 4.4(3).3 – SOLIDS Input of the HSPF Manual.[2]

CONS

To access the CONS Parameters dialog box, press the CONS button in the Reach/Reservoir Activity dialog box. This dialog box allows the user to specify up to 10 water quality constituents or pollutants in the flows from a reach/reservoir segment. The CONS Parameters dialog box lets the user enter the parameters for the following CONS input tables: NCONS, CONS-AD-FLAGS, CONS-DATA. For more information on these tables, see Section 4.4(2).7 – IQUAL input of the HSPF manual.[3]

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

HTRCH

To access the HTRCH Parameters dialog box, press the HTRCH button in the Reach/Reservoir Activity dialog box. The HTRCH Parameters dialog box lets the user enter the parameters for the following HTRCH input tables: HT-BED-FLAGS, HEAT-PARM1, HT-BED-DELH, HT-BED-DELTT, and HEAT-INIT. The following monthly value tables may also be input from this dialog if required: MON-HT-TGRND. Some parameters require a single value for the entire simulation and others are allowed to vary monthly, depending on the flags set in the HT-BED-FLAGS table. For more information on these tables, see Section 4.4(3).5 – HTRCH input of the HSPF manual.[4]

SEDTRN

To access the SEDTRN Parameters dialog box, press the SEDTRN button in the Reach/Reservoir Activity dialog box. The SEDTRN Parameters dialog box lets the user enter the parameters for the following SEDTRN input tables: SANDFG, SED-GENPARM, SAND-PM, SILT-CLAY-PM, SSED-INIT, BED-INIT. The SED-HYDPARM table may also be active if the HYDR module is inactive. The combination of required tables will vary, depending on the flags set in the SAND-FG table. The required tables will be listed in the drop-down list to indicate input that must be completed. Simply choose a table from the list and the input fields for that table will appear. For information on the definition and function of specific variables in this module, see Section 4.4(3).6 – SEDTRN Input of the HSPF Manual.[5]

RQUAL

This module is used to simulate the behavior of constituents involved in biochemical transformations. Unlike the other modules, this has multiple sections that are each as involved as any other module. Those sections are OXRX, NUTRX, PLANK and PHCARB, which model primary dissolved oxygen and biochemical oxygen demand balances, inorganic nitrogen and phosphorus balances, plankton populations and associated reactions, and pH and inorganic carbon species, respectively. The constituents that may be modeled using RQUAL are dissolved oxygen, biochemical oxygen demand, ammonia, nitrite, nitrate, orthophosphorus, phytoplankton, benthic algae, zooplankton, dead refractory organic nitrogen, dead refractory organic phosphorus, dead refractory organic carbon, pH and carbon dioxide.

To access the RQUAL Parameters dialog box, press the RQUAL button in the Reach/Reservoir Activity dialog box. The RQUAL Parameters dialog box lets the user enter the parameters for the following RQUAL input tables: BENTH-FLAG and SCOUR-PARMS. The four checkboxes and buttons located in the RQUAL dialog box lead to the four sections of the RQUAL module: OXRX, NUTRX, PLANK and PHCARB. Input for those sections will be discussed in detail below. For information on the definition and function of specific variables in this module, see Section 4.4(3).8 – RQUAL Input of the HSPF Manual.[6]

Related Topics

• Reach/Reservoir Data
• Entering HSPF Parameters