Following is the appearance of the Reactions tab of the River Coefficients dialog:
Following is a description of the parameters associated with Reactions. Refer to the main River Coefficients page for information on other categories of coefficients. To save the changes made when closing this dialog, click OK. To ignore changes, click Cancel.
Aeration Factor is the reaeration rate multiplier (0.2 – 1 / day)
SOD is the constant sediment oxygen demand for the river’s bottom sediment (0.1 – 2 g / sq m / day)
Convective Heat Factor is proportional to the influence of the air temperature upon the water temperature (1.0E-06 – 1.0E-04, unitless)
Precipitate Settling is the rate at which hydroxide precipitates settle out of the water column (0 – 1 m / day)
The Reaction Rates spreadsheet has reaction rates for each of reactions listed in the System Coefficients dialog
The Water column is the reaction rate within the river water column, above the river bed (>=0, units vary)
The Bed column is the reaction rate within the river bed (>=0, units vary)
When the Apply Changes To Selected Rivers button is checked, changes made to the coefficients of the river being edited will be made to all selected rivers. When the Apply Changes To All Rivers button is checked, changes made to the coefficients of the river being edited will be made to all rivers.
See also…
Catchment Reaction Coefficients
Reservoir Reaction Coefficients
System Parameters