Effect of Flow Velocity on Sediment Oxygen Demand: Experimental Results

Thumbnail Image

View/Download File

Persistent link to this item

View Statistics

Journal Title

Journal ISSN

Volume Title


Effect of Flow Velocity on Sediment Oxygen Demand: Experimental Results

Published Date



St. Anthony Falls Hydraulic Laboratory




Sedimentary oxygen demand, SOD, frequently the major oxygen consumer in lakes, is the uptake of dissolved oxygen, DO, by sediments. The oxygen is removed from the water column by chemical oxidation processes and by the respiration of microbes in the sediments. To effectively counteract oxygen dep1etion especially in lakes, an improved understanding of SOD is required. In 1994 Nakamura and Stefan published a theory relating SOD to flow velocity using boundary layer concepts. This paper is an experimental validation and extension of those results. In this study SOD is investigated in laboratory experiments in which sediments are exposed to water flowing at different velocities. The experiments were performed in a recirculating channel with well defined flow characteristics. The results verify that SOD increases with the velocity of the water above the sediments. However, this velocity effect is found to have an upper bound. The rate of increase with velocity as well as the upper bound of SOD are shown to depend on the sediment material, the benthic biology, and the temperature. SOD is approximated by linear and Michaelis-Menten type equations with velocity being the independent variable.



Related to




Series/Report Number

Funding information

US Environmental Protection Agency, Environmental Research Laboratory

Isbn identifier

Doi identifier

Previously Published Citation

Suggested citation

Mackenthun, Alan A.; Stefan, Heinz G.. (1995). Effect of Flow Velocity on Sediment Oxygen Demand: Experimental Results. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/109286.

Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.