Document Detail


Modified Lagrangian method for modeling water quality in distribution systems.
MedLine Citation:
PMID:  15261535     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
G R Munavalli; M S Mohan Kumar
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Water research     Volume:  38     ISSN:  0043-1354     ISO Abbreviation:  Water Res.     Publication Date:  2004 Jul 
Date Detail:
Created Date:  2004-07-20     Completed Date:  2004-10-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0105072     Medline TA:  Water Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  2973-88     Citation Subset:  IM    
Affiliation:
Department of Civil Engineering, Indian Institute of Science, Bangalore 560 012, India. gurumunavalli@yahoo.co.in
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MeSH Terms
Descriptor/Qualifier:
Models, Theoretical*
Quality Control
Sensitivity and Specificity
Water Pollutants / analysis*
Chemical
Reg. No./Substance:
0/Water Pollutants

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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