Instantaneous Release into a Stream
In this section of Fate you can enter data to predict the concentration of a pollutant in a stream. The input of the pollutant is treated as an instantaneous input; for example, the immediate release and mixing of 50 gallons of acetone into a river. The model used here is a one-dimensional advection-dispersion equation that can also account for the first-order degradation or removal. A sample problem has been loaded with values similar to those you might need.