Streambed sediment and the overlying water were monitored for E. coli concentrations over a range of flow conditions during storm events and the impact of sediment E. coli on stream water quality was characterized. Data collected in the field were used to develop and test a model of E. coli resuspension that uses sediment transport theory to calculate the release of E. coli from the streambed sediment to the water column To get additional insight into these legacy organisms, sediment and water samples were collected in the Squaw Creek watershed near Ames, Iowa, during the first significant precipitation event of the season in spring 2013. The E. coli concentration varied greatly during the precipitation event, ranging from 360 to 37,553 CFU per 100 mL Because of the high flow caused by precipitation, the stream sediment characteristics changed dramatically during the study, with a decrease in the E. coli levels in the stream sediment corresponding to a decrease in the fraction of fine particles in the sediment.
|Original language||English (US)|
|Number of pages||2|
|Specialist publication||Resource: Engineering and Technology for Sustainable World|
|State||Published - Mar 1 2016|
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)