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Direct Field Determination of the Natural Reaeration Coecient by Frequency Response Analysis
Author(s) -
Shieth YeiShong,
Davidson Burton
Publication year - 1971
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr007i006p01522
Subject(s) - aeration , environmental science , natural frequency , grayling , hydrology (agriculture) , amplitude , field (mathematics) , mechanics , soil science , geotechnical engineering , geology , mathematics , vibration , physics , engineering , acoustics , oceanography , arctic , quantum mechanics , waste management , pure mathematics
By means of a mechanical instream aerator operated in a sinusoidal fashion with a known amplitude and frequency, it is possible to determine quantitatively the value of the natural reaeration coefficient from chosen field measurements of dissolved oxygen (DO) concentration. The method uses a mechanical aerator as a boundary condition in conjunction with a detailed one‐dimensional, unsteady state Streeter‐Phelps model of a polluted river. By means of an analysis Au Gres sand and of parent material in Grayling sand, (c) Gravity yield in relation to depth for of the DO variation with time at a fixed distance downstream from the forcing function at the end of the transient period, the natural reaeration coefficient can be uncoupled parametrically from the biochemical removal coefficient, the benthal demand factor, and the respiration term in a unique way. The frequency response method of determining the natural reaeration coefficient under dynamic field conditions has widespread applicability in water pollution analysis.