Mass balance of a wastewater loaded canal system: case study of Bangkok.
A dynamic water quality model was applied in order to investigate self-purification processes in highly loaded canals in the centre of Bangkok, capital city of Thailand. Oxygen production by aquatic plants induces a significant diurnal variation of the dissolved oxygen concentration. The corresponding profiles of heterotrophic growth and BOD5 concentration demonstrate the limiting impact of oxygen shortage during night time. Both self-purification mechanisms--biological degradation and settling--are considered and water-sediment interactions are calculated. Simulation results and measurement data are summarized by mass balance schemes which offer a telling characterization of the complex system.
Banjongproo
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P
Department of Environmental Engineering, University of Innsbruck, Technikerstrasse 13, A-6020 Innsbruck, Austria.
Wett
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B
D001673:Biodegradation, Environmental; D002947:Cities; D002980:Climate; D019015:Geologic Sediments / Q000737:chemistry; D008962:Models, Theoretical; D010100:Oxygen / Q000032:analysis* / Q000378:metabolism; D010944:Plants; D011786:Quality Control; D013785:Thailand; D014873:Water Pollutants / Q000009:adverse effects*
D014873:Water Pollutants; D010100:Oxygen