Journal : Acta Geophysica
Article : Importance of advective zone in longitudinal mixing experiments

Authors :
Rowiński, P.
Institute of Geophysics, Polish Academy of Sciences, Księcia Janusza 64, 01-452 Warszawa, Poland,,
Nikora, V.
Engineering Department, University of Aberdeen, King’s College, Scotland, UK,,
Majewski, W.
Institute of Meteorology and Water Management, ul. Podleśna 61, 01-673 Warszawa, Poland,,
Aberle, J.
Leichtweiss-Institute for Hydraulic Engineering, Technical University of Braunschweig, Beethovenstr. 51, 38106 Braunschweig, Germany,,
Dittrich, A.
Leichtweiss-Institut of Hydraulic Engineering (LWI), Department of Hydraulic Engineering, Beethovenstrasse 51a, 38106 Braunschweig, Germany,,
Brovchenko, I.
Ukrainian Center of Environmental and Water Projects Glushkova Prospect 42, 03187, Kiev, Ukraine,,
Demchenko, N.
Atlantic Branch of P.P. Shirshov Institute of Oceanology Russian Academy of Sciences Prospect Mira 1, 236000 Kaliningrad, Russia,,
Néelz, S.
Heriot-Watt University, Riccarton, Edinburgh, EH14 4AS, UK,,
Wörman, A.
Environmental Physics Group, Swedish University of Agricultural Sciences, Uppsala, Sweden,,
Wallis, S.
Heriot-Watt University, Riccarton, Edinburgh, EH14 4AS, UK, s.g.wallis@,
Shucksmith, J.
Department of Civil Engineering, University of Sheffield, UK,,
Abstract : 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.

Keywords : environmental hydraulics, longitudinal mixing experiment, advection diffusion equation, advective zone,
Publishing house : Instytut Geofizyki PAN
Publication date : 2007
Number : Vol. 55, no. 1
Page : 95 – 103

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Qute : Rowiński, P. ,Nikora, V. ,Majewski, W. ,Aberle, J. ,Dittrich, A. ,Brovchenko, I. ,Demchenko, N. ,Néelz, S. ,Wörman, A. ,Wallis, S. ,Shucksmith, J. ,Shucksmith, J. , Importance of advective zone in longitudinal mixing experiments. Acta Geophysica Vol. 55, no. 1/2007