Sensitivity Analysis of Reservoir Oxygen Model

Snodgrass, William J.; Holloran, M.F.

doi:10.4296/cwrj0803001

Cited by 1 publication

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“…Predictive oxygen models based upon mass balance concepts are much more scarce. One work assumes that oxygen decay in a reservoir is controlled by allochthonous sources (17,18); consideration of sediment oxygen demand (19)(20)(21) improves the model fit in hypolimnetic waters.…”

Section: Previous Workmentioning

confidence: 99%

“…The physical description of oxygen models for lakes can be divided into two main forms-box models and dispersed plug flow (DPF) models. The former (24)(25)(26) typically describe the epilimnion overyling the hypolimnion (a two-box model) while the latter (17)(18)(19)(20)(21)(22)(23)(24) provide further physical resolution by dividing the lake vertically into many slices of equal thickness. In the limit, as the thickness of slices increases, the DPF approaches the description of the box model.…”

Section: Previous Workmentioning

confidence: 99%

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Lake Ontario oxygen model. 1. Model development and application

Snodgrass¹,

Dalrymple²

1985

Environ. Sci. Technol.

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w A mathematical model for dissolved oxygen has been formulated for Lake Ontario. The lake is treated as one box during winter circulation but as two boxes (epilimnion, hypolimnion) during summer stratification; inflows, outflows, vertical transport across the thermocline, atmospheric reaeration, photosynthesis, and decomposition are considered. For each year, temperature data are used to estimate the vertical exchange coefficient and the thermocline depth as a function of time. Predictions of the oxygen model show reasonable agreement with observations for a 9-year period. This agreement provides some verification for the model and for the application of the oceanic stoichiometry of Redfield to lakes. Model predictions and observations suggest that oxygen is transported from the hypolimnion to the epilimnion and from the epilimnion to the atmosphere during summer stratification. Vertical transport accounts for ca. 10% of the hypolimnetic loss of oxygen.

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