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Investigating the Relationship between the Manning Coefficients (n) of a Perforated Subsurface Stormwater Drainage Pipe and the Hydraulic Parameters

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dc.citedby5
dc.contributor.authorAbdullah J.en_US
dc.contributor.authorMohd Arif Zainol M.R.R.en_US
dc.contributor.authorRiahi A.en_US
dc.contributor.authorZakaria N.A.en_US
dc.contributor.authorYusof M.F.en_US
dc.contributor.authorShaharuddin S.en_US
dc.contributor.authorAlias M.N.en_US
dc.contributor.authorMohd Kasim M.Z.en_US
dc.contributor.authorAbdul Aziz M.S.en_US
dc.contributor.authorMohamed Noor N.en_US
dc.contributor.authorZawawi M.H.en_US
dc.contributor.authorIkhsan J.en_US
dc.contributor.authorid55109846800en_US
dc.contributor.authorid57193313971en_US
dc.contributor.authorid55812065900en_US
dc.contributor.authorid25643674100en_US
dc.contributor.authorid37050433500en_US
dc.contributor.authorid55927985200en_US
dc.contributor.authorid57190672417en_US
dc.contributor.authorid57792384000en_US
dc.contributor.authorid36695908700en_US
dc.contributor.authorid25221616600en_US
dc.contributor.authorid39162217600en_US
dc.contributor.authorid55926014300en_US
dc.date.accessioned2024-10-14T03:19:08Z
dc.date.available2024-10-14T03:19:08Z
dc.date.issued2023
dc.description.abstractSubsurface perforated pipes drain infiltrated stormwater runoff while attenuating the peak flow. The Manning roughness coefficient (n) was identified as a fundamental parameter for estimating roughness in various subsurface channels. Hence, in this work, the performance of a six-row non-staggered sand-slot perforated pipe as a sample of the subsurface drainage is investigated experimentally in a laboratory flume at Universiti Sains Malaysia (USM) aimed at determining the Manning roughness coefficients (n) of the pipe and assessing the relationship between the Manning�s n and the hydraulic parameters of the simulated runoff flow under the conditions of the tailgate channel being opened fully (GFO) and partially (GPO), as well as the pipe having longitudinal slopes of 1:750 and 1:1000. Water is pumped into the flume at a maximum discharge rate of 35 L/s, and the velocity and depth of the flow are measured at nine points along the inner parts of the pipe. Based on the calculated Reynolds numbers ranging from 38,252 to 64,801 for both GFO and GPO conditions, it is determined that most of the flow in the perforated pipe is turbulent, and the calculated flow discharges and velocities from the outlets under GFO are higher than the flow and velocity rates under GPO with similar pipe slopes of 1:750 and 1:1000. The Manning coefficients are calculated at nine points along the pipe and range from 0.004 to 0.009. Based on the ranges of the calculated Manning�s n, an inverse linear relationships between the Manning coefficients and the flow velocity under GFO and GPO conditions are observed with the R2 of 0.975 and 0.966, as well as 0.819 and 0.992 resulting from predicting the values of flow velocities with the equations v = ((0.01440 ? n)/0.009175), v = ((0.01330 ? n)/0.00890), v = ((0.02007 ? n)/0.01814), and v = ((0.01702 ? n)/0.01456) with pipe slopes of 1:750 and 1:1000, respectively. It is concluded that since the roughness coefficient (Manning�s n) of the pipe increases, it is able to reduce the flow velocity in the pipe, resulting in a lower peak of flow and the ability to control the quantity of storm water in the subsurface urban drainages. � 2023 by the authors.en_US
dc.description.natureFinalen_US
dc.identifier.ArtNo6929
dc.identifier.doi10.3390/su15086929
dc.identifier.issue8
dc.identifier.scopus2-s2.0-85156116802
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85156116802&doi=10.3390%2fsu15086929&partnerID=40&md5=a407d44cd0cf3497c5d48afc79910758
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/34335
dc.identifier.volume15
dc.publisherMDPIen_US
dc.relation.ispartofAll Open Access
dc.relation.ispartofGold Open Access
dc.sourceScopus
dc.sourcetitleSustainability (Switzerland)
dc.subjectManning coefficient
dc.subjectsand-slot perforated pipe
dc.subjectstormwater runoff
dc.subjecturban subsurface drainages
dc.subjectMalaysia
dc.subjectdrainage basin
dc.subjectflow velocity
dc.subjecthydraulic property
dc.subjectpeak flow
dc.subjectrunoff
dc.subjectsubsurface flow
dc.titleInvestigating the Relationship between the Manning Coefficients (n) of a Perforated Subsurface Stormwater Drainage Pipe and the Hydraulic Parametersen_US
dc.typeArticleen_US
dspace.entity.typePublication
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