Benthic oxygen demand in Lake Apopka, Florida

Belanger, Thomas V.

doi:10.1016/0043-1354(81)90120-2

Cited by 50 publications

(22 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…1) (Rahm & Svensson, 1989;Dade, 1993;Nakamura & Stefan, 1994). The existence and significance of the diffusive boundary layer above the sediment-water interface has been demonstrated in numerous experimental studies (Belanger, 1981;Jørgensen & Revsbech, 1985;Whittemore, 1986;Jørgensen & DesMarais, 1990;Mackenthun & Stefan, 1998;Josiam & Stefan, 1999;Steinberger & Hondzo, 1999;Røy et al 2002;House, 2003). Many of these studies consider a fully developed diffusive boundary layer, i.e., the DO concentration profile varies only in the vertical direction and not in the direction of the bulk flow.…”

Section: Introductionmentioning

confidence: 99%

Oxygen transfer from flowing water to microbes in an organic sediment bed

et al. 2008

View full text Add to dashboard Cite

Mass transfer of dissolved oxygen (DO) across a sediment-water interface was investigated using laboratory experiments and a numerical simulation model. DO concentration profiles and velocity profiles were measured with high resolution in a recirculating flume with water flowing at crosssectional average velocities from 3.5 to 11.5 cm/s over a flat and hydrodynamically smooth organic sediment bed. Parameters extracted from the measurements included (1) the DO penetration depth, (2) the effective diffusion coefficient in the sediment layer, (3) the thickness of the turbulent diffusive boundary layer, and (4) the diffusion coefficients in the diffusive boundary layer. DO penetration depths were less than 1 mm, and diffusive boundary layer thicknesses were less than 8 mm. Diffusion in the sediment porewater system was shown to be essentially molecular. The laboratory data were compared to results from a deterministic simulation model. The model included explicit descriptions of (1) mass transfer through the diffusive boundary layer above the sediment/water interface, (2) the boundary layer development over the sediment bed of finite length, (3) diffusive transfer in the sediment porewater system, and (4) microbial uptake of DO in the sediment. The model included both water-side and sediment-side mass transport limitations. The control of DO flux could alternate between water-side and sediment-side without discontinuity. Monod-type kinetics was adopted for DO uptake in the sediment. Organic substrate availability in the sediment did not vary over the course of an experiment. A kinetic limitation for organic matter (substrate) was not considered, and microbial activity in the sediment was parameterized by biomass density. Measured and simulated DO concentration profiles showed satisfactory agreement, with some discrepancies at the interface caused by roughness and porosity effects of the sediment surface.

show abstract

Section: Introductionmentioning

confidence: 99%

Oxygen transfer from flowing water to microbes in an organic sediment bed

et al. 2008

View full text Add to dashboard Cite

show abstract

“…3에 나타내었고, 경과시 간 및 거리에 따른 수심별 로다민 농도변화를 (Belanger 1981, Takada and Kato 1991, Gelda et al 1995, Kang and Song 2000. …”

Section: 인공 호소와 대형 댐을 대상으로 한 호 내 수질개선기술unclassified

Hydraulic Impact Scope and Dissolved Oxygen Distribution by the Micro-bubble Aeration in an Artificial Lake

Choi¹,

Park²

2016

Ecology and Resilient Infrastructure

View full text Add to dashboard Cite

This study investigated the hydraulic impact scope and dissolved oxygen (DO) concentration distribution by the micro-bubble aeration in the Juksan Lake located in Asan city in Chungcheongnam-do province. A tracing experiment for hydraulic impact scope was used which constituted a 20% rhodamine solution. A 160 m-guideline was installed in the horizontal direction of the micro-bubble jet flow and the rhodamine concentration, water temperature, and DO concentration were measured at depths of 1 m, 2 m, and 3 m at intervals of 10 m. In the Juksan Lake, the effective range of jet flow discharged by the micro-bubble generator was about 40 m, and after then the jet plume moved up to 80 m to 120 m through the advection and diffusion processes of ambient water. DO concentration in the lake was maintained at 7.4-12.6 mg/L during tracking experiment. The DO of the lake sediments improved from 0.2 mg/L to 8.0 mg/L after applying micro-bubble aeration.In conclusion, the micro-bubble aeration can be an effective technology for the management and improvement of water quality in an agricultural reservoir. KEYWORDS:

show abstract

“…Brewer et al (1977) found that the biological SOD contributed almost 91 % of the total SOD. Belanger (1981) found that the biological SOD contributed 60-90 % of the total SOD. Different sediment characteristics decided biological SOD and chemical SOD playing different roles in these samples.…”

Section: Biological and Chemical Contributions To The Sodmentioning

confidence: 99%

Total, chemical, and biological oxygen consumption of the sediments in the Ziya River watershed, China

Rong

Shan

2016

Environ Sci Pollut Res

View full text Add to dashboard Cite

Sediment oxygen demand (SOD) is a critical dissolved oxygen (DO) sink in many rivers. Understanding the relative contributions of the biological and chemical components of SOD would improve our knowledge of the potential environmental harm SOD could cause and allow appropriate management systems to be developed. A various inhibitors addition technique was conducted to measure the total, chemical, and biological SOD of sediment samples from 13 sites in the Ziya River watershed, a severely polluted and anoxic river system in the north of China. The results showed that the major component of SOD was chemical SOD due to iron predominate. The ferrous SOD accounted for 21.6-78.9 % of the total SOD and 33.26-96.79 % of the chemical SOD. Biological SOD represented 41.13 % of the overall SOD averagely. Sulfide SOD accounted for 1.78-45.71 % of the total SOD and it was the secondary predominate of the chemical SOD. Manganous SOD accounted for 1.2-16.6 % of the total SOD and it was insignificant at many sites. Only four kinds of benthos were collected in the Ziya River watershed, resulting from the low DO concentration in the sediment surface due to SOD. This study would be helpful for understanding and preventing the potential sediment oxygen depletion during river restoration.

show abstract

Benthic oxygen demand in Lake Apopka, Florida

Cited by 50 publications

References 7 publications

Oxygen transfer from flowing water to microbes in an organic sediment bed

Oxygen transfer from flowing water to microbes in an organic sediment bed

Hydraulic Impact Scope and Dissolved Oxygen Distribution by the Micro-bubble Aeration in an Artificial Lake

Total, chemical, and biological oxygen consumption of the sediments in the Ziya River watershed, China

Contact Info

Product

Resources

About