Importance of advective zone in longitudinal mixing experiments

One-dimensional Fickian dispersion models such as the advection diffusion equation (ADE) are commonly used to analyse and predict concentration distributions downstream of contamination events in watercourses. Such models are only valid once the tracer had entered the equilibrium zone. This paper co...

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Bibliographic Details
Published inActa geophysica Vol. 55; no. 1; pp. 95 - 103
Main Authors Shucksmith, James, Boxall, Joby, Guymer, Ian
Format Journal Article
LanguageEnglish
Published Berlin Versita 01.03.2007
Springer Nature B.V
Subjects
advection diffusion equation
advective zone
Cross sections
Diffusion
Dispersions
environmental hydraulics
Estimates
Geochemistry
Geophysics
Groundwater flow
longitudinal mixing experiment
Mathematical analysis
Mathematical models
Tracers
Water pollution
Watercourses
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Summary:One-dimensional Fickian dispersion models such as the advection diffusion equation (ADE) are commonly used to analyse and predict concentration distributions downstream of contamination events in watercourses. Such models are only valid once the tracer had entered the equilibrium zone. This paper compares previous theoretical, experimental and numerical estimates of the distance to reach the equilibrium zone with new experimental values, obtained by examining the change of skewness in a tracer profile, downstream of a cross-sectionally well mixed source. Closer agreement was found with Fischers’ theoretical estimate than prior experimental and numerical studies.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:1895-6572
1895-7455
DOI:10.2478/s11600-006-0042-7