Hypolimnetic Anoxia and Sediment Oxygen Demand in California Drinking Water Reservoirs

Application of photoelectrochemical chemical oxygen demand to drinking water

This study investigated the use of a photoelectrochemical chemical oxygen demand (peCOD) analyzer for the detection of natural organic matter (NOM) from four drinking water treatment plants in Nova Scotia, Canada. This novel method was investigated because it can measure NOM within 5 minutes and does not require hazardous reagents. As an initial research step, eight model organic compounds were...

Mechanisms of the Deoxygenation of the Hypolimnia of Lakes

The deoxygenation of the hypolimnia of lakes and reservoirs normally occurs as a combined result of the sediment oxygen demand and the oxygen demand of the algae and other plant materials that grow in the epilimnion. For some waterbodies, there may be appreciable amounts of oxygen-demanding material brought in from the watershed, but this is usually a relatively unimportant source of oxygen dem...

Estimates of hypolimnetic oxygen deficits in ponds

Shallow tropical integrated culture ponds in the Pearl River Delta. China, have been found to stratify almost daily, with high organic loadings and dense algal growth. The dissolved oxygen (DO) concentration is super-saturated in the epilimnion and is under 2 mg/l in the hypolimnion (>lm). The compensation depth corresponds to twice the Secchi disk depth ranging from 50 to 80cm. As a result, li...

Predicting Oxygen Transfer in Hypolimnetic Oxygenation Devices

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Accumulation of Sediment in Reservoirs