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A NEW METHOD FOR ESTIMATING PRODUCTIVITY IN STANDING WATERS USING FREE OXYGEN MEASUREMENTS 1
Author(s) -
Hornberger George M.,
Kelly Mahlon G.
Publication year - 1974
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.1752-1688.1974.tb00565.x
Subject(s) - fourier series , productivity , oxygen , mixing (physics) , series (stratigraphy) , environmental science , fourier analysis , homogeneous , fourier transform , chemistry , mathematics , thermodynamics , mathematical analysis , physics , geology , paleontology , organic chemistry , quantum mechanics , economics , macroeconomics
Continuous measures of net productivity at discrete depths in standing waters may be obtained using diurnal free oxygen measurements and estimates of the vertical mixing. If oxygen concentration and vertical mixing are known in a laterally homogeneous water body, the only unknown term in the oxygen mass‐balance equation is net productivity. If this is represented by a Fourier series, the equation may be solved and Fourier coefficients selected so that the sum of square errors between the oxygen measurements and predictions of the equation is minimized; the Fourier series then describes the diurnal variation of net productivity.