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| Created: | May 15, 2022 at 4:50 a.m. | |
| Last updated: | May 15, 2022 at 4:53 a.m. | |
| Citation: | See how to cite this resource |
| Sharing Status: | Public |
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Abstract
E. Coli and Listeria monocytogenes (or L. monocytogenes) are bacteria affecting fresh produce that is harmful for health of humans and animals. If these bacteria are present in surface waterbody (e.g., irrigation canals), they will impair irrigation water quality and threaten produce safety. This paper studied the resuspension of E. Coli and Listeria from bed sediment into irrigation water through several sets of laboratory experiments in an open channel flume. We studied three types of sediments using several flow rates in different velocities and shear stress. Bacteria’s concentration in water increases with the bed shear stress. Two empirical relations were derived to correlate the concentration of E. coli and L. monocytogenes with the dimensionless bed shear stress. The experimental data favorably verified the relationships for sandy loam, loamy sand and loam. The results showed that both bacteria could entrain from sand more efficiently comparing to other sediments (i.e. sandy loam or loam). These relationships can be applied to water quality models for simulating E. coli and L. monocytogenes transport in irrigation canals for better managing irrigation water quality.
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This resource was created using funding from the following sources:
| Agency Name | Award Title | Award Number |
|---|---|---|
| Arizona Department of Agriculture | Canal Sediments as Reservoirs of Pathogenic Bacteria in Irrigation Systems | SCBGP19-28 |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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