Parsimonious Model for Combined Sewer Overflow Pollution
Publication: Journal of Environmental Engineering
Volume 136, Issue 3
Abstract
The reservoir concept for flow modeling has been generalized for the purpose of the parsimonious modeling of combined sewer overflow pollution. Conceptual models have been used for the buildup and washoff of pollutants on the paved surfaces, and the transport of these pollutants in the sewer system (advection, dispersion, sedimentation, and resuspension). For the parsimonious modeling of the water quality of the sewage in the effluent of the combined sewer system, the conceptual submodels of these different processes were lumped into one single model equation. When ancillary structures such as a storage sedimentation tank are present at the combined sewer overflow, the additional effect of advection, dispersion, storage, and sedimentation is considered in a similar parsimonious conceptual way. Such a parsimonious model aims to reduce the model complexity, and therefore the number of calibration parameters. In most practical cases of urban drainage modeling, water quality data are extremely limited and consequently only a small number of parameter values can be identified from the data. The proposed model is tested on the basis of 10-min and hourly concentration measurements for total suspended solids, settleable solids, biochemical oxygen demand, and ammonia at the outlet of the combined sewer system of the village of Dessel (Belgium), which were available in this case only for six overflow events.
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Acknowledgments
The research was funded through postdoctoral scholarships from the Flemish Fund for Scientific Research F.W.O.–Vlaanderen and the Research Fund of K.U.Leuven. The measuring campaign at the combined sewer system of Dessel was part of an interuniversity project on “Ancillaries to combined sewer overflows” supported by the Flemish Authorities VMM and AMINAL.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 136 • Issue 3 • March 2010
Pages: 316 - 325
Copyright
© 2010 ASCE.
History
Received: Jul 17, 2009
Accepted: Aug 24, 2009
Published online: Aug 26, 2009
Published in print: Mar 2010
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