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Main Title Stochastic Models for Biochemical Oxygen Demand and Dissolved Oxygen in Estuaries.
Author Custe, Stephen W. ; Krutchkof, Richard G. ;
CORP Author Virginia Polytechnic Inst., Blacksburg. Water Resources Research Center.
Year Published 1969
Report Number Bull-22; OWRR-A-027-VA; 01774,; 16090-02/69
Stock Number PB-188 094
Additional Subjects ( Water pollution ; Mathematical models) ; ( Estuaries ; Oxygen) ; Potomac River ; Stochastic processes ; Statistical distributions ; Differential equations ; Numerical analysis ; Computer programs ; Diffusion ; Biochemical oxygen demand ; Dissolved oxygen ; Dissolved gases
Library Call Number Additional Info Location Last
NTIS  PB-188 094 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 249p
Two distinct stochastic models, the Non-Dispersion Model and the Diffusion Model were developed for determining the biochemical oxygen demand (BOD) and dissolved oxygen (DO) probability distribution in an estuary. The mean BOD and DO concentrations were functions of time and space, hence the probability distributions were also temporally and spatially dependent. A computer program was employed to summarize the results in a concise form so that it could be used in the overall decision process. Information for a given point in space was obtained five miles downstream from the source. The mean BOD and DO levels were obtained for each increment of the tidal cycle. The frequency of the concentration above each critical value was obtained. A comparison of the numerical results revealed that the traumatic peaks observed for the non-dispersion model were obliterated in the diffusion model. In the light of the numerical results it concluded that the non-diffusion model was inadequate for describing the estuary situation. The diffusion model was verified on water quality survey data for the Potomac estuary. (Author)