Technique for Calibrating Network Models
Publication: Journal of Water Resources Planning and Management
Volume 109, Issue 4
Abstract
In calibrating a water distribution system model, the model user usually adjusts pipe roughness (e.g., Hazen‐Williams C factor) or water use so that pressures and flows predicted by the model agree with values observed in the field. This paper presents formulas to assist the user in deciding whether to adjust C or water use and by how much. The key to using the formulas is to observe pressures in the system for at least two significantly different use rates. Such data are often collected during fire flow tests. A model is considered calibrated to the extent that it can predict the behavior of the water distribution system over a wide range of operating conditions and water use.
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References
1.
Cesario, A. L., “Computer Modeling Programs: Tools for Model Operations,” Journal of the American Water Works Association, Vol. 72, No. 9, Sept., 1980, pp. 508–513.
2.
Eggener, C. L., and Polkowski, L. B., “Network Models and the Impact of Modeling Assumptions,” Journal of the American Water Works Association, Vol. 67, No. 4, Apr., 1975, pp. 189–196.
3.
“Form and Procedure for Fire Flow Test,” Journal of the American Water Works Association, Vol. 68, No. 5, May, 1976, pp. 223–268.
4.
Shamir, U., and Howard, C. D. D., “Engineering Analysis of Water Distribution System,” Journal of the American Water Works Association, Vol. 69, No. 9, Sept., 1977, pp. 510–514.
5.
“Water Distribution Research and Applied Development Needs,” American Water Works Association Research Committee on Distribution Systems, Journal of the American Water Works Association, Vol. 66, No. 6, June, 1974, pp. 385–390.
Information & Authors
Information
Published In
Journal of Water Resources Planning and Management
Volume 109 • Issue 4 • October 1983
Pages: 360 - 372
Copyright
Copyright © 1983 ASCE.
History
Published online: Oct 1, 1983
Published in print: Oct 1983
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