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Modified Lagrangian method for modeling water quality in distribution systems

Munavalli, GR and Kumar, Mohan MS (2004) Modified Lagrangian method for modeling water quality in distribution systems. In: Water Research, 38 (13). pp. 2973-2988.

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Abstract

Previous work has shown that Lagrangian methods are more efficient for modeling the transport of chemicals in a water distribution system. Two such methods, the Lagrangian Time-Driven Method (TDM) and Event-Driven Method (EDM) are compared for varying concentration tolerance and computational water quality time step. A new hybrid method (EDMNET) is developed which improves the accuracy of the Lagrangian methods. All the above methods are incorporated in an existing hydraulic simulation model. The integrated model is run for different network problems under varying conditions. The TDM-generated solutions are affected by both concentration tolerance and water quality time step, whereas EDM solutions are dependent on concentration tolerance. The EDMNET solutions are less sensitive to variations in these parameters. The threshold solutions are determined for all the methods and compared. The hybrid method simulates the nodal concentrations accurately with least maximum segmentation of network and reasonable computational effort as compared to the other Lagrangian methods.

Item Type: Journal Article
Additional Information: The copyright belongs to Elsevier.
Keywords: Bulk decay;Distribution system;Dynamic modeling;Quality time step;Concentration tolerance;Wall decay;Water quality
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 25 Apr 2006
Last Modified: 19 Sep 2010 04:25
URI: http://eprints.iisc.ernet.in/id/eprint/6435

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