Prediction models for flow resistance in flexible vegetated channels

The analysis of flow resistance due to vegetation remains an issue in the hydraulic industry, although it has been systematically studied for several decades, accurate prediction of the resistance is still a challenge. This is because most of the previous studies used synthetic vegetation to model f...

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Main Authors: Muhammad, M.M., Yusof, K.W., Mustafa, M.R.U., Zakaria, N.A., Ab Ghani, A.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.21713 /
Published: Taylor and Francis Ltd. 2018
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85043341427&doi=10.1080%2f15715124.2018.1437740&partnerID=40&md5=c92e9d53d3e594362c7408a1af9d5628
http://eprints.utp.edu.my/21713/
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spelling utp-eprints.217132018-08-01T02:08:38Z Prediction models for flow resistance in flexible vegetated channels Muhammad, M.M. Yusof, K.W. Mustafa, M.R.U. Zakaria, N.A. Ab Ghani, A. The analysis of flow resistance due to vegetation remains an issue in the hydraulic industry, although it has been systematically studied for several decades, accurate prediction of the resistance is still a challenge. This is because most of the previous studies used synthetic vegetation to model flow�vegetation interactions. This paper presents the applications of the artificial neural network (ANN) and gene expression programming (GEP) as advanced tools, to predict the flow resistance (n) of natural vegetation using a grassed swale and laboratory channel, irrespective of the grass height with relative to flow depth. To achieve this, hourly discharges and water depths were measured in the grassed swale for different rainfall events using the electromagnetic current metre. Experiments were performed in the laboratory channel using the same grass, in order to get additional data. From the results obtained regression equation was developed for predicting the flow resistance through the use of dimensional analysis. The regression equation obtained was compared with the established models of ANN and GEP. The results show that ANN and GEP models gave a better prediction of n-values, based on performance indices. However, the GEP model would be preferred as it produced a physical equation that can be used in engineering practice. © 2018 International Association for Hydro-Environment Engineering and Research Taylor and Francis Ltd. 2018 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85043341427&doi=10.1080%2f15715124.2018.1437740&partnerID=40&md5=c92e9d53d3e594362c7408a1af9d5628 Muhammad, M.M. and Yusof, K.W. and Mustafa, M.R.U. and Zakaria, N.A. and Ab Ghani, A. (2018) Prediction models for flow resistance in flexible vegetated channels. International Journal of River Basin Management . pp. 1-11. http://eprints.utp.edu.my/21713/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description The analysis of flow resistance due to vegetation remains an issue in the hydraulic industry, although it has been systematically studied for several decades, accurate prediction of the resistance is still a challenge. This is because most of the previous studies used synthetic vegetation to model flow�vegetation interactions. This paper presents the applications of the artificial neural network (ANN) and gene expression programming (GEP) as advanced tools, to predict the flow resistance (n) of natural vegetation using a grassed swale and laboratory channel, irrespective of the grass height with relative to flow depth. To achieve this, hourly discharges and water depths were measured in the grassed swale for different rainfall events using the electromagnetic current metre. Experiments were performed in the laboratory channel using the same grass, in order to get additional data. From the results obtained regression equation was developed for predicting the flow resistance through the use of dimensional analysis. The regression equation obtained was compared with the established models of ANN and GEP. The results show that ANN and GEP models gave a better prediction of n-values, based on performance indices. However, the GEP model would be preferred as it produced a physical equation that can be used in engineering practice. © 2018 International Association for Hydro-Environment Engineering and Research
format Article
author Muhammad, M.M.
Yusof, K.W.
Mustafa, M.R.U.
Zakaria, N.A.
Ab Ghani, A.
spellingShingle Muhammad, M.M.
Yusof, K.W.
Mustafa, M.R.U.
Zakaria, N.A.
Ab Ghani, A.
Prediction models for flow resistance in flexible vegetated channels
author_sort Muhammad, M.M.
title Prediction models for flow resistance in flexible vegetated channels
title_short Prediction models for flow resistance in flexible vegetated channels
title_full Prediction models for flow resistance in flexible vegetated channels
title_fullStr Prediction models for flow resistance in flexible vegetated channels
title_full_unstemmed Prediction models for flow resistance in flexible vegetated channels
title_sort prediction models for flow resistance in flexible vegetated channels
publisher Taylor and Francis Ltd.
publishDate 2018
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85043341427&doi=10.1080%2f15715124.2018.1437740&partnerID=40&md5=c92e9d53d3e594362c7408a1af9d5628
http://eprints.utp.edu.my/21713/
_version_ 1741196506066583552
score 11.62408

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