reaeration

Both the deoxygenation rate, and reaeration rate, can be temperature corrected, following the general formula.

In addition to the oxidation of organic matter and the reaeration process, there are many other processes in a stream which affect the DO.

This differential equation states that the total change in oxygen deficit (D) is equal to the difference between the two rates of deoxygenation and reaeration at any time.

Furthermore only one DO sink (carbonaceous BOD) and one DO source (reaeration) is considered in the classical Streeter-Phelps model.

Enhanced Stream Water Quality Model (QUAL2E): Simulates the major reactions of nutrient cycles, algal production, benthic and carbonaceous demand, atmospheric reaeration and their effects on the dissolved oxygen balance.

The expanded model is a modification of the traditional model and includes internal sources (reaeration and photosynthesis) and sinks (BOD, background BOD, SOD and respiration) of DO.