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DEOXYGENATION IN NATURAL STREAMS 1
Author(s) -
Bansal Mahendra K.
Publication year - 1975
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1975.tb00702.x
Subject(s) - deoxygenation , froude number , streams , biochemical oxygen demand , chemistry , oxygen , volume (thermodynamics) , dimensionless quantity , environmental science , environmental chemistry , hydrology (agriculture) , chemical oxygen demand , flow (mathematics) , thermodynamics , mechanics , environmental engineering , geology , wastewater , computer network , biochemistry , physics , organic chemistry , geotechnical engineering , computer science , catalysis
Deoxygenation process in which carbonaceous BOD is biochemically oxidized to reduced inorganic compounds is of great significance in the oxygen demand of stream waters. The BOD decay rate traditionally determined in a laboratory might not necessarily be the same as estimated for a natural stream. The variation in biochemical activity could occur due to differences in adsorption, dispersion, and biophysical processes taking place in the two environments. The first stage biochemical oxygen demand and benthal oxygen demand that occur simultaneously in a stream, have been considered together to calculate the gross rate of deoxygenation in polluted waters. The available data on deoxygenation measurements has been analyzed in this study to calculate the carbonaceous BOD rate constants in natural streams. The analysis indicates that the dimensionless deoxygenation parameter is a function of the ratio of the Reynolds number and Froude number of flow. The functional relationship between these two parameters essentially follows a straight line on a log‐log plot. The applicability of the relationship does not depend upon the volume of the organic load, size, or location of the stream.