WMS:HSPF 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.

Related Topics

• HSPF Modules