Defense Date

4-7-2022

Graduation Date

Spring 5-13-2022

Availability

Immediate Access

Submission Type

thesis

Degree Name

MS

Department

Environmental Science and Management (ESM)

Committee Chair

David Kahler

Committee Member

Theodore Corcovilos

Committee Member

Kevin Rose

Keywords

turbulent transport, turbulent mixing, dissolved oxygen, reaeration, oxygen consumption rate

Abstract

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.

Language

English

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