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Roughness coefficient in operational sections of sewage systems


Torres, A and Zarruk Serrano, GA and Borrero, JAL, Roughness coefficient in operational sections of sewage systems, Investigacion, biodiversidad y desarrollo, 28, (1) pp. 85-92. ISSN 1657-3498 (2009) [Professional, Non Refereed Article]

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During the design of sewer systems, laboratory values of flow resistance coefficients are usually used for different pipe materials. This estimation can have important consequences, in particular on the building costs of large sewer systems, and their medium and long term hydraulic performances. Due to the scarce field data available, the present study aims to assess the actual resistance coefficients on sewer systems in use, and identify and classify some of the conditions that influence their variation. In addition, laboratory experiments were conducted to define the experimental design and compare to field results. Results suggest that the material of the studied sections, in addition with management related factors (state and time of service of the sewage sections) have an important effect on the variation of the hydraulic resistance coefficient and on its estimation uncertainty. We confirmed that a prominent difference exists between the average resistance coefficients obtained in the laboratory and in the field for sections of the same material and different diameter.

Item Details

Item Type:Professional, Non Refereed Article
Keywords:Uniform flow; roughness coefficient, sewage systems; ANOVA; uncertainty analysis
Research Division:Engineering
Research Group:Civil engineering
Research Field:Civil engineering not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in engineering
UTAS Author:Zarruk Serrano, GA (Dr Gustavo Zarruk Serrano)
ID Code:88342
Year Published:2009
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2014-01-29
Last Modified:2014-02-04

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