BOD-DO dispersion modelling accounting for sedimentation

The widely used Streeter and Phelps Models for the computation of Biochemical Oxygen Demand (BOD) and Dissolved Oxygen (DO) do not account for settling of settleable organic matter. Moreover, the several dispersion models developed also do not account for settleable BOD. Such models are, therefore, of little value in making an accurate computation of the DO sag parameters in a polluted stream. An attempt has therefore, been made to include the settling of settleable organic matter in the dispersion models. Such a model would be more appropriate to reflect a real life situation.