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101243

Effect of Water Depth Change on Manning Coefficient for Partially-Filled Circular Culverts.

Article

Last updated: 22 Jan 2023

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Subjects

-

Tags

Irrigation and Hydraulic Engineering

Abstract

Culvert is a structure used to convey surface runoff through embankments. The circular is the popular section for design pipes, such as culverts, drain tiles and sewers of small and medium sizes. Also it may be made of concrete, steel, corrugated metal and polyethylene. Manning's equation is most commonly used throughout the world for the purpose of computing flow velocities in open channel. Manning roughness coefficient is one of the effective factors on water velocity and discharge. The present study is about the determination of the relation between relative depth and relative roughness for circular culvert. For this purpose, field work was carried out on four pipe culverts on canals at El-Mahalla El kubra, Egypt. The culverts are of different diameters, slopes and materials. The velocity is recorded by using FlowTracker. Manning roughness coefficient greatly varied with the variation of relative depth, surface roughness and discharge. For four culverts, a total of 143 depth data points were collected at different discharges ranging from 0.004 to 4.750 m3/sec. New equations are developed for relation between the relative depth (d/D) and the relative roughness (n/nf) for flow depths less than 25% full for four pipe culverts on El Mahalla El Kubra, Egypt, when the water geometries are given. 

DOI

10.21608/bfemu.2020.101243

Keywords

Manning’s coefficient, Manning’s equation, open channel, culvert, pipe, relative depth, and relative roughness

Authors

First Name

Marwa

Last Name

Meky

MiddleName

EL-Sayed A.

Affiliation

Demonstrator, Civil Engineering Department, Higher Institute of Engineering and Technology, Kafr El-Sheikh, Egypt,

Email

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City

-

Orcid

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First Name

Shimaa

Last Name

Ghoraba

MiddleName

M.

Affiliation

Lecturers, Irrigation and Hydraulics Engineering Department, Faculty of Engineering-Tanta University, Egypt,

Email

-

City

-

Orcid

-

First Name

I.

Last Name

Rashwan

MiddleName

M. H.

Affiliation

Hydraulic Professor, is with Irrigation and Hydraulic Engineering Department, Faculty of Engineering, Tanta University, Tanta, Egypt

Email

imh_rashwan@yahoo.com

City

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Orcid

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Volume

40

Article Issue

2

Related Issue

15351

Issue Date

2015-06-01

Receive Date

2015-04-15

Publish Date

2020-07-07

Page Start

39

Page End

53

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 40_Issue 2_Pages 39-53.pdf

PDF . 467.4kB

Link

https://bfemu.journals.ekb.eg/article_101243.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=101243

Order

11

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

https://bfemu.journals.ekb.eg/

MainTitle

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Details

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Article

Created At

22 Jan 2023