Estimating Longitudinal and Transverse Dispersion Coefficients in Open Channel
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Abstract
Results are presented from a series of laboratory experiments conducted on an open channel. Twenty five data sets (L1-L25) have been measured to obtain the magnitude of the longitudinal dispersion coefficient and eight data sets (T1-T8) have been performed to estimate transverse mixing coefficient in channel. The method involves derivation of a new expression for the longitudinal and transverse dispersion coefficients which used routing concentration of pollutant in the advection- dispersion equation solution in water quality mathematical model. Values of longitudinal and transverse dispersion coefficients are compared with measured data and previous similar studies. These comparisons have been showed that tracer technique by using second moment is the most accurate prediction of the longitudinal and transverse dispersions coefficients than the other techniques.
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References
Fischer, H. B., E. J. List, R. C. Y. Koh, J. Imberger, N. H. Brooks,” Mixing Inland and Coastal Waters”, Academic Press Inc., New York, (1979).
Rutherford,J.C. “River mixing” John Wiley & Sons, Chichester,(1994).
Majeed,M.,K,”Study of Radioactivity Dispersion in Rivers and Calculation Risk Assessment”, Msc. Thesis ,College of Eng., Al-Mustansiriah University,2006.
Merle C. P., David C. W. and Midhat H., “Mechanics of Fluids”, second Edition, Prentice-Hall, Inc. (1997).
Won Seo,& Tae Sung Cheong, “Predicting Longitudinal Dispersion Coefficient in Natural Streams” J. Hydraulics Div. ASCE Jan. HY1 pp25-32, (1998). DOI: https://doi.org/10.1061/(ASCE)0733-9429(1998)124:1(25)
Field, M, S., “The QTRACER2 Program for Traver Breakthrough Curve Analysis for Hydrological Tracer Tests in Karstic Aquifers and Other Hydrological Systems”, U.S. EPA, Washington, D. C. (2002).
Guymer I., “Longitudanl Dispersion in Sinuous Channel with Changes in Shape” J. Hydraulics Div. ASCE Jan. HY1 pp33- 40, (1998) DOI: https://doi.org/10.1061/(ASCE)0733-9429(1998)124:1(33)
McQuivey,R.S. & Keefer,T.N., 1974, Cited in Ref. (Rutherford,J.C..1994).
Fischer, 1975, Cited in Ref. (IAEA, “Generic Models for use in Assessing the Impact of Discharges of Radioactive Substances to the Environment”, Safety Series, No.19, Vienna, (2001).
Jain,S.C. “Longitudinal dispersion coefficients for streams”, Am. Soc. Civil Eng., 102 (EE2), pp465-474 (1976). DOI: https://doi.org/10.1061/JEEGAV.0000479
Liu, 1977. Cited in Ref. (Rutherford,J.C..1994).
Thomann, R.V.,“Verification of Water Quality Models”, J. of Environmental Eng. Div., ASCE, Volume 108, No.EE5, pp.923-940. (1982). DOI: https://doi.org/10.1061/JEEGAV.0001352