scholarly journals Sediment oxygen demand in streams : lab measurements underestimate in situ rates substantially

2021 ◽  
Vol 22 (48) ◽  
pp. 19-24
Author(s):  
Erik Jeppesen ◽  
Torben Moth Iversen ◽  
Tserenpil Sh

Global warming is expected to affect stream metabolism significantly; and higher temperatures may lead to higher respiration and thus higher risk of oxygen depletion. It is, therefore, crucial to obtain reliable data on the oxygen dynamics in the different stream compartments. Determination of sediment oxygen demand (SOD) is typically based on lab or field measurement using cores or benthic chamber in which the actual physical conditions in the streams are not possible to mimic perfectly. We compared SOD based on lab core incubations with SOD measured in situ in stream sections where the oxygen exchange between water and air was eliminated artificially. The in situ SOD increased with increasing oxygen concentrations and both the temperature and the oxygen dependency of SOD increased with increasing organic content in the surface sediment. The laboratory rates reached 17 - 83% of the rates obtained in situ. The percentages were especially low at low stream velocity, likely reflecting a pure imitation of the physical conditions near the sediment in the lab when the sediment organic content was high (at low velocity). Therefore, alternative methods, simulating the natural horizontal water flow, are needed to provide reliable information on SOD in streams.

1983 ◽  
Vol 17 (6) ◽  
pp. 603-605 ◽  
Author(s):  
Bruce E. Markert ◽  
Michael G. Tesmer ◽  
Peter E. Parker

2019 ◽  
Vol 48 (2) ◽  
pp. 403-411
Author(s):  
Erin N. Coenen ◽  
Victoria G. Christensen ◽  
Lynn A. Bartsch ◽  
Rebecca M. Kreiling ◽  
William B. Richardson

1977 ◽  
Vol 12 (1) ◽  
pp. 135-156 ◽  
Author(s):  
W.J. Snodgrass ◽  
M.F. Holloran

Abstract A vertical one-dimensional temperature-oxygen model for reservoirs is used to estimate zones of stress on the aquatic environment of a series of reservoirs in Nova Scotia. Application to cold climates necessitated a few novel developments for the temperature model. The oxygen model whose sinks are water column decay and sediment oxygen demand (SOD) is calibrated using under ice measurements of oxygen stocks and laboratory and in situ measurements of a zero-order kinetic model for sediment oxygen demand. These extensive studies are complementary and indicate a winter SOD of 0.1 gm 02/m2/day and a higher summer value. High epilimnetic temperatures coupled with the predicted anoxic zones in lower waters cause a major stress upon fisheries potential. This model provides a tool for determining the effects of different reservoir management strategies upon water quality and for selecting among these strategies.


2018 ◽  
Vol 77 (10) ◽  
pp. 2377-2387 ◽  
Author(s):  
P. M. D'Aoust ◽  
F. R. Pick ◽  
R. Wang ◽  
A. Poulain ◽  
C. Rennie ◽  
...  

Abstract Stormwater retention ponds can play a critical role in mitigating the detrimental effects of urbanization on receiving waters that result from increases in polluted runoff. However, the benthic oxygen demand of stormwater facilities may cause significant hypoxia and trigger the production of hydrogen sulfide (H2S). This process is not well-documented and further research is needed to characterize benthic processes in stormwater retention ponds in order to improve their design and operation. In this study, sediment oxygen demand (SOD), sediment ammonia release (SAR) and sediment sulfide production (SSP) kinetics were characterized in situ and in the laboratory. In situ SOD and SSP data were utilized to develop a stormwater retention pond water sulfide concentration model which demonstrates strong correlation with sulfide concentrations observed in situ (r = 0.724, N = 91, p < 0.001) and in laboratory experiments (r = 0.691, N = 38, p < 0.001). At 4 °C, in situ rates of SOD, SAR and SSP were higher than those measured in laboratory. Sulfate-reducing bacteria (SRB) represented 4.99% of the bacteria present in the top 30 cm of the pond sediment, with Desulfobulbaceae spp., Desulfobacteraceae spp. and Desulfococcus spp. being the dominant SRB taxa identified.


2001 ◽  
Vol 43 (5) ◽  
pp. 203-210 ◽  
Author(s):  
S. Jubb ◽  
I. Guymer ◽  
G. Licht ◽  
J. Prochnow

This paper describes the continuation of an investigation into the effects of increased flow on the dissolved oxygen concentration in the River Maun, UK. A previous investigation indicated that an oxygen demand additional to that in the water phase is observed during and directly after intermittent discharges. Simplified modelling of the river indicated that the additional oxygen demand was possibly linked to the disturbance of sediment during such events. A device has been developed which can be used in situ to measure the effect of flow velocity (shear stress) on the additional demand. Preliminary tests have shown that the inferred demand is significant. It is proposed that the in situ device now be used to measure the oxygen demand of the bed material at a number of locations and flow speeds and that a relationship between the additional demand and velocity be established, with the aim of incorporating such a relationship into a simplified model.


1991 ◽  
Vol 25 (3) ◽  
pp. 351-354 ◽  
Author(s):  
J VEENSTRA ◽  
S NOLEN

2011 ◽  
Vol 137 (8) ◽  
pp. 717-730 ◽  
Author(s):  
David M. Waterman ◽  
Andrew R. Waratuke ◽  
Davide Motta ◽  
Yovanni A. Cataño-Lopera ◽  
Heng Zhang ◽  
...  

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