Following is the appearance of the Soil Layers tab of the Catchment Coefficients dialog and Inorganic Carbon selected:
Following is a description of the Inorganic Carbon parameters associated with Soil Layers. Refer to the main Catchment 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.
Three different options can be used to calculate total inorganic carbon (TIC) in the soil layers. To view them, click on the arrow at the right side of the option (
). Following are the functions of the three options (the Atmospheric Equilibrium option is recommended).
Calculate: TIC is calculated as the combined amount of TIC in the water and CO2 in the layer’s air space divided by the amount of water plus the amount of water needed to dissolve the gaseous CO2 in the layer.
Atmospheric Equilibrium: TIC is calculated using Henry’s Law, with the atmospheric CO2 partial pressure multiplied by Factor to account for root zone respiration
Constant Concentration: TIC is set equal to Factor in moles/l.