Determination of Impact of Sediment Oxygen Demand on the Souris River Dissolved Oxygen

2011 ◽  
Vol 2011 (17) ◽  
pp. 944-963
Author(s):  
Murthy Kasi ◽  
Mathew Baker ◽  
Veselina Valkov ◽  
Joseph Super ◽  
Heather Duchscherer ◽  
...  
1998 ◽  
Vol 38 (10) ◽  
pp. 23-30
Author(s):  
Sarah Jubb ◽  
Philip Hulme ◽  
Ian Guymer ◽  
John Martin

This paper describes a preliminary investigation that identified factors important in the prediction of river water quality, especially regarding dissolved oxygen (DO) concentration. Intermittent discharges from combined sewer overflows (CSOs) within the sewerage, and overflows at water reclamation works (WRW) cause dynamic conditions with respect to both river hydraulics and water quality. The impact of such discharges has been investigated under both wet and dry weather flow conditions. Data collected from the River Maun, UK, has shown that an immediate, transient oxygen demand exists downstream of an outfall during storm conditions. The presence of a delayed oxygen demand has also been identified. With regard to modelling, initial investigations used a simplified channel and the Streeter-Phelps (1925) dissolved oxygen sag curve equation. Later, a model taking into account hydrodynamic, transport and dispersion processes was used. This suggested that processes other than water phase degradation of organic matter significantly affect the dissolved oxygen concentration downstream of the location of an intermittent discharge. It is proposed that the dynamic rate of reaeration and the sediment oxygen demand should be the focus of further investigation.


2020 ◽  
Vol 51 (3) ◽  
pp. 381-391 ◽  
Author(s):  
Lars Bengtsson ◽  
Osama Ali-Maher

Abstract The consumption of oxygen in ice-covered lakes is analyzed and related to biological oxygen demand and sediment oxygen demand. An approach for computing dissolved oxygen concentration is suggested assuming horizontally mixed waters and negligable vertical dispersion. It is found that the depletion of dissolved oxygen is mainly due to the transfer of oxygen at the water/sediment interface. The morphology of a lake is very important for how fast the dissolved oxygen concentration is reduced during winter.


2000 ◽  
Vol 18 (2) ◽  
pp. 157-161 ◽  
Author(s):  
Sun Yao ◽  
Chen Ju-fa ◽  
Yin Li ◽  
Song Yun-li

1995 ◽  
Vol 46 (1) ◽  
pp. 69 ◽  
Author(s):  
BH Kolb ◽  
MC Heineman

A summer-long monitoring programme investigated mechanisms controlling near-bottom dissolved oxygen (DO) concentrations in New Bedford Outer Harbor, a shallow embayment on the southern Massachusetts coast that receives discharge from a 1.3 m3 s-1 municipal sewage outfall. Continuously recording meters and hydrographic cruises measured DO, temperature, salinity, meteorology, waves and/or currents. The programme quantified the magnitude, spatial extent and duration of oxygen undersaturation in the bottom waters. Summer stratification of New Bedford Outer Harbor reduced reaeration of the bottom waters. Depletion of near-bottom DO was strongly correlated with the presence and duration (though not intensity) of stratification. Stratification is typically thermal, a result of seasonal warming of the water surface, although it can become enhanced (and somewhat salinity driven) owing to the influx of cold saline bottom water following major storm events. Destratification is caused by high wind speed or a drop in 24-h average air temperatures below the water temperature. The decrease in DO concentrations when the water column is stratified is directly related to local sediment oxygen demand. In general, DO dynamics were found to be local and fundamentally one dimensional.


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