Sediment Oxygen Demand and Nutrient Fluxes for a Tropical Reservoir in Singapore
Publication: Journal of Environmental Engineering
Volume 136, Issue 1
Abstract
Sediment oxygen demand (SOD) and nutrient flux studies were conducted for a tropical reservoir in Singapore in order to determine the approximate SOD and nutrient release rates from the sediments. SOD values obtained from laboratory experiments ranged from 1.4 to . Similar results were also obtained by calculating SOD values from in situ DO measurements taken in the field. The nutrient flux study was performed in the laboratory at a constant temperature of in oxic and anoxic columns. Except for , higher nutrient release rates were generally observed under anoxic conditions. The ammonium release rate was under oxic conditions and under anoxic conditions. The nitrate flux rate was under oxic conditions but was negligible under anoxic conditions. Orthophosphate flux results were negative throughout the oxic incubation implying that sediments acted as a sink. The release rate of orthophosphate was under anoxic conditions.
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Acknowledgments
We acknowledge the funding support from the UNSPECIFIEDPublic Utilities Board, Singapore.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 136 • Issue 1 • January 2010
Pages: 78 - 85
Copyright
© 2010 ASCE.
History
Received: Jul 22, 2008
Accepted: Jun 23, 2009
Published online: Jun 25, 2009
Published in print: Jan 2010
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