Variation in Manning's Roughness Coefficient with Diameter, Discharge, and Slope in Partially Filled HDPE Culverts

Devkota, Janesh; Baral, Darshan; Rayamajhi, Bishes; Tritico, Hans M.

doi:10.1061/9780784412312.170

Cited by 8 publications

(2 citation statements)

References 2 publications

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“…Additionally, in 2007, the American Concrete Pipe Manufacturers Association proposed n values ranging from 0.009 to 0.015 for high-density polyethylene (HDPE) sewer pipes. Devkota et al (2012) obtained a value of n of 0.011 for sewage polyethylene pipes with a diameter of 300 mm and a filling ratio of 45%.…”

Section: Model Calibrationmentioning

confidence: 99%

Dissolved oxygen determination in sewers using flow hydraulic parameters as part of a physical-biological simulation model

Heydarzadeh

Tabesh

Scholz

2021

Journal of Hydroinformatics

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This paper aims to develop a model for calculating the hydraulic and water quality parameters of wastewater within sewers. Information from the wastewater collection network and the transmission line in Birjand were used to verify the model performance. The parameters used for modelling quality changes include the yield constant for biomass (YH), the maximum specific growth rate (μH), the saturation constant for dissolved oxygen (KOG) and the saturation constant for readily biodegradable substrate within a biofilm (KSF), as well as the Gauckler–Manning–Strickler coefficient (n). They were selected from references and were verified at the calibration stage comparing measurements with the modelling values. Inputs of the created model are the average concentrations of dissolved oxygen and chemical oxygen demand of the incoming wastewater, the flow rate of wastewater at the exit point of the network, physical characteristics of the pipes and the height of drops within the sewer network. The amount of dissolved oxygen at different positions of the sewer network was calculated. The acceptable calculated sum of squares of errors and the correlation coefficient (R2) of the calibrated model for dissolved oxygen were 1.6872 and 0.77, respectively.

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Section: Model Calibrationmentioning

confidence: 99%

Dissolved oxygen determination in sewers using flow hydraulic parameters as part of a physical-biological simulation model

Heydarzadeh

Tabesh

Scholz

2021

Journal of Hydroinformatics

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“…High velocity sections and shallow depths are well documented challenges to upstream D r a f t fish migration (Devkota et al 2012;Olsen and Tullis 2013;Goerig et al 2016). Culvert inlets can locally constrict the channel width leading to an increase in average cross-sectional velocities over the culvert length.…”

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confidence: 99%

Influence of baffles on upstream passage of brook trout and brown trout in an experimental box culvert

Duguay

Lacey

Castro‐Santos

2019

Can. J. Fish. Aquat. Sci.

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There is much to learn about improving baffle designs to increase successful fish passage through culverts. A fish’s motivation to attempt entry into the culvert is essential. Upon entry, successful passage will largely depend on the physiological ability of the fish to navigate the entire culvert length. In this study, the motivation of brook trout (Salvelinus fontinalis (Mitchill, 1814)) and brown trout (Salmo trutta Linnaeus, 1758) to attempt ascent of an experimental flume, which mimics a roadway culvert left bare (smooth) or fitted with either spoiler or weir baffles, is assessed. Performance, measured as maximum distance of ascent within the flume, is also quantified. The bare flume was the most motivating for brook trout, and the weirs were most motivating for brown trout. As a rule, brown trout showed less motivation to stage attempts than brook trout, except within the weir baffle treatments. Performance was greatest in the weirs for smaller trout and in the spoiler baffles for larger trout. Our findings suggest that baffle form influences passage rates at road crossings in ways previously unknown and further stresses the importance of considering fish motivation and performance together when assessing the efficacy of baffle forms.

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Effect of Fish Baffles on the Hydraulic Roughness of Slip-Lined Culverts

Duguay

Lacey

2015

J. Hydraul. Eng.

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Variation in Manning's Roughness Coefficient with Diameter, Discharge, and Slope in Partially Filled HDPE Culverts

Cited by 8 publications

References 2 publications

Dissolved oxygen determination in sewers using flow hydraulic parameters as part of a physical-biological simulation model

Dissolved oxygen determination in sewers using flow hydraulic parameters as part of a physical-biological simulation model

Influence of baffles on upstream passage of brook trout and brown trout in an experimental box culvert

Effect of Fish Baffles on the Hydraulic Roughness of Slip-Lined Culverts

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