equation: critical sulphur deposition
The critical sulphur deposition is calculated by adding the effects of base cation uptake and base cation deposition to the critical load of sulphur. Basecation deposition has an acid neutralizing effect, whereas uptake (by vegetation) reduces the amount of base cations available to neutralize acidic inputs. The sulphur fraction $S_f$ is used on these variables for reasons of consistency. As the critical load of acidity was assumed to be differentiated among sulphur and nitrogen so should variables which affect acidity. In most cases, the net effect of including these factors is an acid neutralizing influence; thus, the critical sulphur deposition values are generally higher than the critical load of sulphur for a given area.
- critical load
- proton deposition
- soil acidification
equation: (for TeX-notation look at html-source)
mathematical classification: algebraic equation
numerical implementation: exact implementation