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Critical shear stress approach for self-cleansing design of a rectangular channel

The current study aims at the development of an incipient motion equation and a self-cleansing design chart based on the critical shear stress approach for a rectangular channel. Data from previous experimental work on incipient motion for rectangular flumes were subjected to multiple linear regress...

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Main Authors: Hin, Charles Joo Bong, Liew, Chuin Liew, Fang, Yenn Teo, Tze, Liang Lau, Aminuddin, Ab Ghani
Format: Article
Language:English
Published: Elsevier B.V. 2021
Subjects:
TA Engineering (General). Civil engineering (General)
TC Hydraulic engineering. Ocean engineering
Online Access:http://ir.unimas.my/id/eprint/34777/1/S1001627921000044
http://ir.unimas.my/id/eprint/34777/
https://doi.org/10.1016/j.ijsrc.2021.01.002
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spelling my.unimas.ir.347772021-03-11T04:40:33Z http://ir.unimas.my/id/eprint/34777/ Critical shear stress approach for self-cleansing design of a rectangular channel Hin, Charles Joo Bong Liew, Chuin Liew Fang, Yenn Teo Tze, Liang Lau Aminuddin, Ab Ghani TA Engineering (General). Civil engineering (General) TC Hydraulic engineering. Ocean engineering The current study aims at the development of an incipient motion equation and a self-cleansing design chart based on the critical shear stress approach for a rectangular channel. Data from previous experimental work on incipient motion for rectangular flumes were subjected to multiple linear regression analysis. Selected regression models were further assessed through cross validation using the remaining data from the previous experimental work and a performance test using another three sets of existing data from the literature. The best regression model from the current study was found to perform much better than two of the existing equations in the literature by Novak and Nalluri and El-Zaemey with respect to having 95% of the predicted value fall within the acceptable discrepancy ratio range of 0.5–2.0. The equations by Novak and Nalluri and El-Zaemey only managed to have 10 and 16%, respectively, of the predicted values fall within the acceptable discrepancy ratio. The developed best regression model has a coefficient of determination value of 0.9960, adjusted coefficient of determination value of 0.9960, predicted coefficient of determination value of 0.9958, mean square error (MSE) value of 0.0004, and Mallow's value of 3.0. The best regression model was further chosen to develop a self-cleansing design chart for rectangular channels. The design chart which relates the minimum sewer slope with the minimum critical shear stress, for the respective standard rectangular channel size of an open channel system could be used to check and determine the suitable minimum slope for self-cleansing design purposes. Elsevier B.V. 2021-02-12 Article PeerReviewed text en http://ir.unimas.my/id/eprint/34777/1/S1001627921000044 Hin, Charles Joo Bong and Liew, Chuin Liew and Fang, Yenn Teo and Tze, Liang Lau and Aminuddin, Ab Ghani (2021) Critical shear stress approach for self-cleansing design of a rectangular channel. International Journal of Sediment Research. ISSN 1001-6279 hhttps://www.sciencedirect.com/science/article/abs/pii/S1001627921000044#! https://doi.org/10.1016/j.ijsrc.2021.01.002
institution Universiti Malaysia Sarawak
building Centre for Academic Information Services (CAIS)
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sarawak
content_source UNIMAS Institutional Repository
url_provider http://ir.unimas.my/
language English
topic TA Engineering (General). Civil engineering (General)
TC Hydraulic engineering. Ocean engineering
spellingShingle TA Engineering (General). Civil engineering (General)
TC Hydraulic engineering. Ocean engineering
Hin, Charles Joo Bong
Liew, Chuin Liew
Fang, Yenn Teo
Tze, Liang Lau
Aminuddin, Ab Ghani
Critical shear stress approach for self-cleansing design of a rectangular channel
description The current study aims at the development of an incipient motion equation and a self-cleansing design chart based on the critical shear stress approach for a rectangular channel. Data from previous experimental work on incipient motion for rectangular flumes were subjected to multiple linear regression analysis. Selected regression models were further assessed through cross validation using the remaining data from the previous experimental work and a performance test using another three sets of existing data from the literature. The best regression model from the current study was found to perform much better than two of the existing equations in the literature by Novak and Nalluri and El-Zaemey with respect to having 95% of the predicted value fall within the acceptable discrepancy ratio range of 0.5–2.0. The equations by Novak and Nalluri and El-Zaemey only managed to have 10 and 16%, respectively, of the predicted values fall within the acceptable discrepancy ratio. The developed best regression model has a coefficient of determination value of 0.9960, adjusted coefficient of determination value of 0.9960, predicted coefficient of determination value of 0.9958, mean square error (MSE) value of 0.0004, and Mallow's value of 3.0. The best regression model was further chosen to develop a self-cleansing design chart for rectangular channels. The design chart which relates the minimum sewer slope with the minimum critical shear stress, for the respective standard rectangular channel size of an open channel system could be used to check and determine the suitable minimum slope for self-cleansing design purposes.
format Article
author Hin, Charles Joo Bong
Liew, Chuin Liew
Fang, Yenn Teo
Tze, Liang Lau
Aminuddin, Ab Ghani
author_facet Hin, Charles Joo Bong
Liew, Chuin Liew
Fang, Yenn Teo
Tze, Liang Lau
Aminuddin, Ab Ghani
author_sort Hin, Charles Joo Bong
title Critical shear stress approach for self-cleansing design of a rectangular channel
title_short Critical shear stress approach for self-cleansing design of a rectangular channel
title_full Critical shear stress approach for self-cleansing design of a rectangular channel
title_fullStr Critical shear stress approach for self-cleansing design of a rectangular channel
title_full_unstemmed Critical shear stress approach for self-cleansing design of a rectangular channel
title_sort critical shear stress approach for self-cleansing design of a rectangular channel
publisher Elsevier B.V.
publishDate 2021
url http://ir.unimas.my/id/eprint/34777/1/S1001627921000044
http://ir.unimas.my/id/eprint/34777/
https://doi.org/10.1016/j.ijsrc.2021.01.002
_version_ 1695535554639167488
score 13.211869

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