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Testing the SANCHO model on distribution systems
Author(s) -
Laurent Patrick,
Servais Pierre,
Prévost Michèle,
Gatel Dominique,
Clément Bernard
Publication year - 1997
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1997.tb08262.x
Subject(s) - residence time (fluid dynamics) , residence time distribution , computer science , function (biology) , water quality , distribution (mathematics) , environmental science , biological system , mathematics , engineering , ecology , flow (mathematics) , geometry , geotechnical engineering , evolutionary biology , biology , mathematical analysis
A deterministic model to predict microbiological water quality in distribution systems is tested by comparing field data measurements and predicted values obtained through model simulations. Empirical findings were used to evaluate a deterministic model of bacterial dynamics in a pipe carrying potable water. The SANCHO model simulates the response of fixed and free bacteria in the system to the concentrations of chlorine and organic substrate entering the system. The authors tested the model on seven full‐scale distribution systems and made a study of the error distribution between measured values and the model's predicted values. Various simulation examples demonstrate the usefulness of the model for determining a bacterial regrowth control strategy for distribution systems. Coupled with residence time calculation software, the SANCHO model may become an important decision‐making tool in the management of water distribution systems. The model is particularly useful in that it can help define the reduction thresholds for biodegradable dissolved organic carbon required to maintain a given network's quality objectives as a function of the residence time of the water in the system.