It is common in multi-media modelling, that one calculates the contamination level in flora directly from the concentrations of the contaminant in the soil by using concentration factors. The concentration factors depend on both contaminant and plant type.
By creating a new index list for a set of plants, we can quickly extend the previous model to include concentrations in plants.
APlant=CF * ( AUpper Soil + ALower Soil * RootFactor )
AUpper Soil is the concentration in the upper soil layer.
ALower Soil is the concentration in the lower soil layer.
CF is a concentration factor which relates the contamination in plant to the contamination in soil.
RootFactor is a plant type dependent parameter which corrects for the different root depth of different plants.