Water Quality Parameters

In addition to sediment, nutrients, and pesticides, SWAT+ will calculate the amount of algae, dissolved oxygen and carbonaceous biological oxygen demand (CBOD) entering the main channel with surface runoff. Loadings of these three parameters impact the quality of stream water. This chapter reviews the algorithms governing movement of algae, dissolved oxygen and CBOD from land areas to the stream network. Because the algorithms were based on very limited field data, calculation of these loadings has been made optional.