Discharge estimation for trapezoidal open channels applying fuzzy transformation method to a flow equation

The aim of this paper is to implement fuzzy logic theory in order to estimate the discharge for open channels, which is a well-known physical problem affected by many factors. The problem can be solved by the Manning equation but the parameters present uncertainties as to their true-real values. Esp...

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Autores principales:	N. Samarinas, C. Evangelides
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	discharge fuzzy logic manning equation open channel transformation method Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
Acceso en línea:	https://doaj.org/article/29b442f9a0834eb99c7d3768f39315e0
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id	oai:doaj.org-article:29b442f9a0834eb99c7d3768f39315e0
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spelling	oai:doaj.org-article:29b442f9a0834eb99c7d3768f39315e02021-11-06T10:08:16ZDischarge estimation for trapezoidal open channels applying fuzzy transformation method to a flow equation1606-97491607-079810.2166/ws.2021.155https://doaj.org/article/29b442f9a0834eb99c7d3768f39315e02021-09-01T00:00:00Zhttp://ws.iwaponline.com/content/21/6/2893https://doaj.org/toc/1606-9749https://doaj.org/toc/1607-0798The aim of this paper is to implement fuzzy logic theory in order to estimate the discharge for open channels, which is a well-known physical problem affected by many factors. The problem can be solved by the Manning equation but the parameters present uncertainties as to their true-real values. Especially, the Manning n roughness coefficient, which is an empirically derived coefficient, presents quite a high variation for different substrates. With the help of fuzzy logic and utilizing a fuzzy transformation method, it is possible to include the uncertainties of the problem in the calculation process. In this case, it is feasible to estimate the discharge, putting more emphasis on different uncertainty rates of the Manning roughness coefficient, while the rest of the parameters remain with constant or zero uncertainty level. By taking different α-cut levels, it is shown that the methodology gives realistic and reliable results, presenting with great accuracy the variations of the water discharge for trapezoidal open channels. In this way, a possible underestimation or overestimation of the actual physical condition is avoided, by helping engineers and researchers to obtain a more comprehensive view of the real physical conditions, and thus make better management plans. Highlights Novel use of fuzzy logic in the Manning equation.; A new approach to estimate the discharge in open natural channels.; Includes Manning's roughness coefficient uncertainties in the calculation process.; Comparison between the uncertainty parameters of the Manning equation.; Provides accurate information for better management plans and decisions.;N. SamarinasC. EvangelidesIWA Publishingarticledischargefuzzy logicmanning equationopen channeltransformation methodWater supply for domestic and industrial purposesTD201-500River, lake, and water-supply engineering (General)TC401-506ENWater Supply, Vol 21, Iss 6, Pp 2893-2903 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	discharge fuzzy logic manning equation open channel transformation method Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
spellingShingle	discharge fuzzy logic manning equation open channel transformation method Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506 N. Samarinas C. Evangelides Discharge estimation for trapezoidal open channels applying fuzzy transformation method to a flow equation
description	The aim of this paper is to implement fuzzy logic theory in order to estimate the discharge for open channels, which is a well-known physical problem affected by many factors. The problem can be solved by the Manning equation but the parameters present uncertainties as to their true-real values. Especially, the Manning n roughness coefficient, which is an empirically derived coefficient, presents quite a high variation for different substrates. With the help of fuzzy logic and utilizing a fuzzy transformation method, it is possible to include the uncertainties of the problem in the calculation process. In this case, it is feasible to estimate the discharge, putting more emphasis on different uncertainty rates of the Manning roughness coefficient, while the rest of the parameters remain with constant or zero uncertainty level. By taking different α-cut levels, it is shown that the methodology gives realistic and reliable results, presenting with great accuracy the variations of the water discharge for trapezoidal open channels. In this way, a possible underestimation or overestimation of the actual physical condition is avoided, by helping engineers and researchers to obtain a more comprehensive view of the real physical conditions, and thus make better management plans. Highlights Novel use of fuzzy logic in the Manning equation.; A new approach to estimate the discharge in open natural channels.; Includes Manning's roughness coefficient uncertainties in the calculation process.; Comparison between the uncertainty parameters of the Manning equation.; Provides accurate information for better management plans and decisions.;
format	article
author	N. Samarinas C. Evangelides
author_facet	N. Samarinas C. Evangelides
author_sort	N. Samarinas
title	Discharge estimation for trapezoidal open channels applying fuzzy transformation method to a flow equation
title_short	Discharge estimation for trapezoidal open channels applying fuzzy transformation method to a flow equation
title_full	Discharge estimation for trapezoidal open channels applying fuzzy transformation method to a flow equation
title_fullStr	Discharge estimation for trapezoidal open channels applying fuzzy transformation method to a flow equation
title_full_unstemmed	Discharge estimation for trapezoidal open channels applying fuzzy transformation method to a flow equation
title_sort	discharge estimation for trapezoidal open channels applying fuzzy transformation method to a flow equation
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/29b442f9a0834eb99c7d3768f39315e0
work_keys_str_mv	AT nsamarinas dischargeestimationfortrapezoidalopenchannelsapplyingfuzzytransformationmethodtoaflowequation AT cevangelides dischargeestimationfortrapezoidalopenchannelsapplyingfuzzytransformationmethodtoaflowequation
_version_	1718443784436449280

Discharge estimation for trapezoidal open channels applying fuzzy transformation method to a flow equation

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