Environmental Science and Management (ESM)
Bayer School of Natural and Environmental Sciences
turbulent transport, turbulent mixing, dissolved oxygen, reaeration, oxygen consumption rate
The transport and mixing of dissolved oxygen (DO) is important to replenish the oxygen depleted by natural processes; gas transfer in general has implications for ecosystem metabolism and greenhouse gas transfer. Currently, reaeration coefficients can be found through gas tracer methods, which estimates one-way gas transfer. For this project, a net oxygen consumption rate, , was developed using the similarity equations, which provides a value from DO and velocity profiles specific to a stream site. Additionally, three models to calculate friction velocity, which is required for oxygen consumption rate, were compared. Reynolds stresses, mathematically developed in the Reynolds-Averaged Navier-Stokes Equations, are only present in turbulent flows from was examined due to the flow to determine a directional preference in the velocity profiles. High-frequency velocity data was collected in vertical profiles at multiple points in the Monongahela and Allegheny Rivers.
Bachtlin, A. (2022). Turbulent Transport of Dissolved Oxygen in Natural Channels (Master's thesis, Duquesne University). Retrieved from https://dsc.duq.edu/etd/2050