Reaeration of Oxygen in Shallow, Macrophyte Rich Streams: I – Determination of the Reaeration Rate Coefficient

Thyssen, N.; Erlandsen, Mogens; Jeppesen, Erik; Ursin, Christian

doi:10.1002/iroh.19870720403

Cited by 45 publications

(26 citation statements)

References 35 publications

(2 reference statements)

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“…Thyssen et al, 1987;Thene and Gulliver, 1990;Genereux and Hemond, 1992;Melching, 1999). Such measurements are fairly easy and w a t e r r e s e a r c h 4 7 ( 2 0 1 3 ) 1 e1 5 inexpensive to carry out in small streams, but it becomes more challenging in large rivers (e.g.…”

Section: Theoretical Versus Empirical Equations and Direct Measuremenmentioning

confidence: 96%

See 1 more Smart Citation

Temperature dependence of stream aeration coefficients and the effect of water turbulence: A critical review

Demars

Manson

2013

Water Research

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Section: Theoretical Versus Empirical Equations and Direct Measuremenmentioning

confidence: 96%

“…Such indirect methods are not suitable for streams with high reaeration coefficient or/and very low biological activity (e.g. Hornberger and Kelly, 1975;Thyssen et al, 1987). Direct measurements are also only possible for a discrete moment in time and space.…”

Section: Theoretical Versus Empirical Equations and Direct Measuremenmentioning

confidence: 97%

Temperature dependence of stream aeration coefficients and the effect of water turbulence: A critical review

Demars

Manson

2013

Water Research

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“…Different models describing volatilisation from a stream to the atmosphere were reviewed (Southworth (Southworth, 1979), Cadena (Cadena et al (1984), Thyssen (Thyssen et al, 1987;Dahi et al, 1989), Langbein and Durum (Trapp and Harland, 1995) and AQUATOX (Park and Clough, 2012)). The review had the aim to select a model with a low number of parameters required and a large applicability at different hydrogeological units.…”

Section: Volatilisationmentioning

confidence: 99%

Dilution and volatilization of groundwater contaminant discharges in streams

Aisopou¹,

Bjerg²,

Sonne³

et al. 2015

Journal of Contaminant Hydrology

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An analytical solution to describe dilution and volatilisation of a continuous groundwater contaminant plume into streams is developed for risk assessment. The location of groundwater plume discharge into the stream (discharge through the side versus bottom of the stream) and different distributions of the contaminant plume concentration (Gaussian, homogeneous or heterogeneous distribution) are considered. The model considering the plume discharged through the bank of the river, with a uniform concentration distribution was the most appropriate for risk assessment due to its simplicity and limited data requirements. The dilution and volatilisation model is able to predict the entire concentration field, and thus the mixing zone, maximum concentration and fully mixed concentration in the stream. It can also be used to identify groundwater discharge The dilution model can also provide recommendations for sampling locations and the size of impact zones in streams. This is of interest for regulators, for example when developing guidelines for the implementation of the European Water Framework Directive.3

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“…Water temperature is also a main regulator of in-stream processes such as metabolism of plants and animals, microbial decomposition of organic matter and solubility and airwater exchange of gases (Thyssen et al, 1987;Elliott, 1994;Sand-Jensen and Frost-Christensen, 1998;Pedersen and Sand-Jensen, 2005). Moreover, temperature can be a proxy for the origin of water sources to the stream and, therefore, of its chemical composition.…”

Section: Introductionmentioning

confidence: 99%

Temperature in lowland Danish streams: contemporary patterns, empirical models and future scenarios

Pedersen¹,

Sand‐Jensen²

2006

Hydrological Processes

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Abstract:Continuous temperature measurements at 11 stream sites in small lowland streams of North Zealand, Denmark over a year showed much higher summer temperatures and lower winter temperatures along the course of the stream with artificial lakes than in the stream without lakes. The influence of lakes was even more prominent in the comparisons of colder lake inlets and warmer outlets and led to the decline of cold-water and oxygen-demanding brown trout. Seasonal and daily temperature variations were, as anticipated, dampened by forest cover, groundwater input, input from sewage plants and high downstream discharges. Seasonal variations in daily water temperature could be predicted with high accuracy at all sites by a linear air-water regression model (r 2 : 0Ð903-0Ð947). The predictions improved in all instances (r 2 : 0Ð927-0Ð964) by a non-linear logistic regression according to which water temperatures do not fall below freezing and they increase less steeply than air temperatures at high temperatures because of enhanced heat loss from the stream by evaporation and back radiation. The predictions improved slightly (r 2 : 0Ð933-0Ð969) by a multiple regression model which, in addition to air temperature as the main predictor, included solar radiation at un-shaded sites, relative humidity, precipitation and discharge. Application of the non-linear logistic model for a warming scenario of 4-5°C higher air temperatures in Denmark in 2070-2100 yielded predictions of temperatures rising 1Ð6-3Ð0°C during winter and summer and 4Ð4-6Ð0°C during spring in un-shaded streams with low groundwater input. Groundwater-fed springs are expected to follow the increase of mean air temperatures for the region. Great caution should be exercised in these temperature projections because global and regional climate scenarios remain open to discussion.

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Reaeration of Oxygen in Shallow, Macrophyte Rich Streams: I – Determination of the Reaeration Rate Coefficient

Cited by 45 publications

References 35 publications

Temperature dependence of stream aeration coefficients and the effect of water turbulence: A critical review

Temperature dependence of stream aeration coefficients and the effect of water turbulence: A critical review

Dilution and volatilization of groundwater contaminant discharges in streams

Temperature in lowland Danish streams: contemporary patterns, empirical models and future scenarios

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