Effects of Temperature on Stream Aeration

Metzger, Ivan

doi:10.1061/jsedai.0000912

Cited by 24 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For helium and nitrogen, represented by subscripts 1 and 2, respectively, the following equations follow from Equation 6. (Metzger, 1965). 25 °C.…”

Section: Analysis Of Experimental Resultsmentioning

confidence: 99%

“…Unfortunately, there is some lack of agreement in the literature concerning this information. Under these circumstances, some of the experimental results were interpreted (Metzger, 1965) in conjunction with reported data to make a reasonable estimate of the values required. The values used in this work are presented in Table I.…”

Section: Analysis Of Experimental Resultsmentioning

confidence: 99%

“…The higher values of the exponent were obtained for experiments conducted at low mixing intensities. Subsequent experiments in a similar system (Metzger, 1965) showed that n approaches a constant value at high mixing intensities. This constant appears to be 0.5, in accord with the predictions of Equation 6, although the exact value depends on a precise knowledge of the molecular diffusion coefficients.…”

mentioning

confidence: 95%

See 2 more Smart Citations

Role of fluid properties in gas transfer

Metzger¹,

Dobbins²

1967

Environ. Sci. Technol.

View full text Add to dashboard Cite

“…For helium and nitrogen, represented by subscripts 1 and 2, respectively, the following equations follow from Equation 6. (Metzger, 1965). 25 °C.…”

Section: Analysis Of Experimental Resultsmentioning

confidence: 99%

Section: Analysis Of Experimental Resultsmentioning

confidence: 99%

mentioning

confidence: 95%

See 1 more Smart Citation

Role of fluid properties in gas transfer

Metzger¹,

Dobbins²

1967

Environ. Sci. Technol.

View full text Add to dashboard Cite

“…Considering the effect of temperature on the mass transfer coefficient, Metzger and Dobbins (1967) and Metzger (1968) used the percolation theory to establish an expression for the mass transfer coefficient, as shown in Equation 9. Daniil and Gulliver (1988) used the mass transfer coefficient at 20°C to calibrate the mass transfer coefficient at other temperatures, as shown in Equation 10.…”

Section: Tablementioning

confidence: 99%

Generation and Release Mechanism and Abatement Measures for Gas Supersaturation Downstream of Hydropower Dams: A Review

Zhang,

Fu,

et al. 2023

Water Resources Research

View full text Add to dashboard Cite

Despite the considerable social and economic benefits of hydropower dams, they can cause total dissolved gas (TDG) supersaturation downstream of hydropower dams, which can harm fish through gas bubble trauma (GBT) and cause issues with aquatic ecology. This paper systematically reviewed the generation and release mechanism of TDG supersaturation, including three stages of TDG generation and release, to broaden the research ideas of TDG supersaturation and encourage the construction of environmentally friendly dams and other hydropower projects. The factors affecting the generation and release were summarized from the three stages of TDG generation and release, including temperature, momentum difference at the water‐air interface, and effective depth of bubble arrival. The research methods were introduced from four aspects: theoretical methods, field observations, experiments, and numerical simulations. The advantages, disadvantages, and application scopes of different research methods were outlined. Finally, the abatement measures in the three stages of TDG generation and release were introduced from the engineering and non‐engineering perspectives, and the future research directions were pointed out from the four aspects of TDG supersaturation generation and release mechanism, research methods, abatement measures, and management methods, including in‐depth study of whether gas‐liquid transfer through bubble surfaces or free surfaces dominates, consideration of bubble coalescence and rupture to improve the accuracy of numerical methods in TDG supersaturation prediction, the combination of engineering and non‐engineering measures to optimize TDG supersaturation abatement measures and consideration of artificial intelligence technology to improve hydropower project management methods.

show abstract

“…Gas-exchange coefficients (k) are generally observed to be a function of temperature (10,35,36), and the typical empirical expression for the relationship between k and temperature has the form:…”

Section: Mercury and Cyanide In Groundwater And Surface Watermentioning

confidence: 99%

Determination of Mercury Evasion in a Contaminated Headwater Stream

Maprani

MacQuarrie

et al. 2005

Environ. Sci. Technol.

View full text Add to dashboard Cite

Evasion from first- and second-order streams in a watershed may be a significant factor in the atmospheric recycling of volatile pollutants such as mercury; however, methods developed for the determination of Hg evasion rates from larger water bodies are not expected to provide satisfactory results in highly turbulent and morphologically complex first- and second-order streams. A new method for determining the Hg evasion rates from these streams, involving laboratory gas-indexing experiments and field tracer tests, was developed in this study to estimate the evasion rate of Hg from Gossan Creek, a first-order stream in the Upsalquitch River watershed in northern New Brunswick, Canada. Gossan Creek receives Hg-contaminated groundwater discharge from a gold mine tailings pile. Laboratory gas-indexing experiments provided the ratio of gas-exchange coefficients for zero-valent Hg to propane (tracer gas) of 0.81+/-0.16, suggesting that the evasion mechanism in highly turbulent systems can be described by the surface renewal model with an additional component of enhanced gas evasion probably related to the formation of bubbles. Deliberate field tracer tests with propane and chloride tracers were found to be a reliable and practical method for the determination of gas-exchange coefficients for small streams. Estimation of Hg evasion from the first 1 km of Gossan Creek indicates that about 6.4 kg of Hg per year is entering the atmosphere, which is a significant fraction of the regional sources of Hg to the atmosphere.

show abstract

Effects of Temperature on Stream Aeration

Cited by 24 publications

References 0 publications

Role of fluid properties in gas transfer

Role of fluid properties in gas transfer

Generation and Release Mechanism and Abatement Measures for Gas Supersaturation Downstream of Hydropower Dams: A Review

Determination of Mercury Evasion in a Contaminated Headwater Stream

Contact Info

Product

Resources

About