The study looked at how pollutants move in urban streams during storms. They found that pollutants are often carried more at the start of a storm, known as the "first flush." This effect was seen in two streams in Knoxville, TN. They also discovered an "end flush" for some pollutants. Factors like flow rate and rainfall influenced how pollutants moved. These findings suggest that what happens in the stream itself can affect how pollutants travel in urban areas.