Real-time control of combined surface water quantity and quality: polder flushing

In open water systems, keeping both water depths and water quality at specified values is critical for maintaining a 'healthy' water system. Many systems still require manual operation, at least for water quality management. When applying real-time control, both quantity and quality standa...

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Bibliographic Details
Published in:Water science and technology 2010-01, Vol.61 (4), p.869-878
Main Authors: Xu, M, van Overloop, P J, van de Giesen, N C, Stelling, G S
Format: Article
Language:English
Subjects:
Algorithms
Computer Simulation
Control
Flushing
Flushing (water)
Mathematical models
Models, Statistical
Models, Theoretical
Netherlands
Polders
Predictive control
Proportional integral
Quality Control
Quality management
Quality standards
Real time
Stability
Surface water
Time Factors
Waste Disposal, Fluid - standards
Water depth
Water Movements
Water Pollutants, Chemical - isolation & purification
Water Purification - methods
Water quality
Water quality control
Water quality management
Water quality standards
Water Supply
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Summary:In open water systems, keeping both water depths and water quality at specified values is critical for maintaining a 'healthy' water system. Many systems still require manual operation, at least for water quality management. When applying real-time control, both quantity and quality standards need to be met. In this paper, an artificial polder flushing case is studied. Model Predictive Control (MPC) is developed to control the system. In addition to MPC, a 'forward estimation' procedure is used to acquire water quality predictions for the simplified model used in MPC optimization. In order to illustrate the advantages of MPC, classical control [Proportional-Integral control (PI)] has been developed for comparison in the test case. The results show that both algorithms are able to control the polder flushing process, but MPC is more efficient in functionality and control flexibility.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2010.847