Determination of Reaeration Coefficients: Whole-Lake Approach

Gelda, Rakesh K.; Auer, Martin T.; Effler, Steven W.; Chapra, Steven C.; Storey, Michelle L.

doi:10.1061/(asce)0733-9372(1996)122:4(269)

Cited by 28 publications

(54 citation statements)

References 23 publications

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“…The Gelda et al [21] equation was developed on a whole-lake system such as the Wanninkhof et al [15] equation and they provide substantially similar results. Finally, in order to apply Lunney et al [14] equation, the mass-transfer coefficient for ethyl ether in the liquid phase must be estimated as:…”

Section: Authormentioning

confidence: 97%

“…Banks and Herrera [20] Empirical -Field data O 2 Wanninkhof et al [15] Empirical -Field data SF 6 0-8.0 Gelda et al [21] Empirical -Field data O 2 0-10.0 Lunney et al [14] Empirical -Field data Ethyl ether 5.0-16.0 [17] equations also is independent from temperature. Estimation equations for φ are in Table V.…”

Section: Authormentioning

confidence: 99%

“…Furthermore, Gelda et al [21] using field data of water column dissolved oxygen concentrations in Onondaga Lake over a rather long period of time derived the following empirical equation for k l-O 2 :…”

Section: Authormentioning

confidence: 99%

“…One value is obtained from Banks and Herrera [20] equation, another one value is obtained from Wanninkhof et al Equation [15], i.e. Equation (15), and the last one is obtained from Gelda et al [21] equation. Finally, the Lunney et al [14] equation was used with Equation (17) to compute k l-ethyl ether , that was converted to k l for MTBE using conversion factor φ in Table V.…”

Section: Verification Of Volatilization Modelsmentioning

confidence: 99%

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Verification of Wind-Driven Volatilization Models

Gualtieri

2006

Environ Fluid Mech

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Mass-transfer processes of paramount importance, such as reaeration and volatilization, occur at the air-water interface. Particularly, volatilization is intensively studied because it can be a relevant removal process for toxic contaminants from flowing and standing surface waters. The paper provides a comparison among predictive equations available from literature for standing waters for the case of MTBE contamination. Most of the considered equations tend to overestimate the volatilization rate, while three equations offer a good fit with the observed data. Finally, these equations are applied to a larger amount of field data.

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Section: Authormentioning

confidence: 97%

Section: Authormentioning

confidence: 99%

Section: Authormentioning

confidence: 99%

Section: Verification Of Volatilization Modelsmentioning

confidence: 99%

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Verification of Wind-Driven Volatilization Models

Gualtieri

2006

Environ Fluid Mech

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“…Water temperature can affect the capacity of dissolved oxygen saturation in a water body, while wind can accelerate oxygen dissolution. For lake systems, wind is considered to be the driving force in regulating surface turbulence, in contrast to the flow-induced turbulence that prevails in most streams [39]. Therefore, the equation for estimating physical re-aeration is derived from Gelda et al [39]:…”

Section: Re-aeration By Wind Regimementioning

confidence: 99%

A Deterministic Model for Predicting Hourly Dissolved Oxygen Change: Development and Application to a Shallow Eutrophic Lake

2016

Water

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Predicting dissolved oxygen (DO) change at a high frequency in water bodies is useful for water quality management. In this study, we developed a deterministic model that can predict hourly DO change in a water body with high frequency weather parameters. The study was conducted during August 2008-July 2009 in a eutrophic shallow lake in Louisiana, USA. An environment monitoring buoy was deployed to record DO, water temperature and chlorophyll-a concentration at 15-min intervals, and hourly weather data including air temperature, precipitation, wind speed, relative humidity, and solar radiation were gathered from a nearby weather station. These data formed a foundation for developing a DO model that predicts rapid change of source and sink components including photosynthesis, re-aeration, respiration, and oxygen consumption by sediments. We then applied the model to a studied shallow lake that is widely representative of lake water conditions in the subtropical southern United States. Overall, the model successfully simulated high-time fluctuation of DO in the studied lake, showing good predictability for extreme algal bloom events. However, a knowledge gap still exists in accurately quantifying oxygen source produced by photosynthesis in high frequency DO modeling.

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Substantial overnight reaeration by convective cooling discovered in pond ecosystems

Holgerson

Zappa

Raymond

2016

Geophysical Research Letters

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Trends in freshwater dissolved oxygen (DO) reflect whole‐ecosystem properties and influence organismal survival and behavior. Here we show that small ponds have unique oxygen dynamics that differ from larger lakes. We discovered that ponds undersaturated in DO experienced substantial increases in oxygen concentration overnight. Nighttime increases in DO occurred on 45% of the nights sampled and resulted in DO saturation increasing 12‐fold (22% saturation) on average. Oxygen spikes were likely to occur when ponds became at least 1.8°C warmer than the air and later in the season when oxygen levels were low (<31% saturation) and the air was warm (≥5.8°C). We demonstrate that overnight increases in surface water DO resulted from atmospheric oxygen invasion as opposed to internal production. Convective cooling enhanced turbulence and air‐water gas exchange, leading to intense bursts of oxygen invasion during nighttime hours. This mechanism has not been demonstrated before and has important implications for the biogeochemistry of these systems, as well as understanding how organisms survive in hypoxic small ponds.

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Determination of Reaeration Coefficients: Whole-Lake Approach

Cited by 28 publications

References 23 publications

Verification of Wind-Driven Volatilization Models

Verification of Wind-Driven Volatilization Models

A Deterministic Model for Predicting Hourly Dissolved Oxygen Change: Development and Application to a Shallow Eutrophic Lake

Substantial overnight reaeration by convective cooling discovered in pond ecosystems

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