Beta
ManageSearchChatDiscover
114731

FLOW ANALYSIS AROUND GROYNE WITH DIFFERENT PERMEABILITY IN COMPOUND CHANNEL FLOODPLAINS

Article

Last updated: 23 Jan 2023

OverviewSimilar Items

Subjects

-

Tags

Civil Engineering: structural, Geotechnical, reinforced concrete and s…nd sanitary engineering, Hydraulic, Railway, construction Management.

Abstract

Presented herein are the results of an experimental study on the flow characteristics around compound channel floodplain groynes with various permeability and length. Both the permeable and impermeable groynes are considered to clarify the influences of floodplain groynes on flow structure, velocity, and water surface. A channel consisting of a main channel and one floodplain with flat and fixed bed was used. The width of floodplain is the same as the main channel width. Pile groyne models with three different relative lengths relative to floodplain width (Lr), 0.5, 0.75, and 1.0, with three different permeability values (P= area of water crossing the groyne/total projected area of groyne) 40%, 60%, 80% plus an impermeable groyne were used and installed in the floodplain with single arrangement. The 3D flow velocities at both of the horizontal plane above floodplain bed by 0.25 of floodplain water depth (h) and at the main channel centerline in the vertical plane were measured using an Acoustic Doppler Veloci-meter (16 MHz Micro-ADV). The flow pattern around groynes was analyzed in both the horizontal and vertical planes. The results show that, for permeable groynes as the permeability increased the groyne length has limited influence on the flow structure. For the horizontal plane maximum and tip velocities were decreased while the minimum and bank velocities were increased as the permeability increased. Empirical formulas to describe these relations depending on the groyne relative length and permeability were suggested. The influence of permeable groynes installation in the compound channel has insignificant effect on the main channel flow while the impermeable groynes affect greatly the main channel flow structure. Both the groyne permeability and length ratio have obvious effects on the floodplain water depth.

DOI

10.21608/jesaun.2013.114731

Keywords

Flow Pattern, Water Surface, Groyne Permeability, Compound Channels

Authors

First Name

Ahmed H.

Last Name

S.

MiddleName

-

Affiliation

Department of Civil Eng, Faculty of Engineering, South Valley University, Qena, Egypte

Email

hshemaid@yahoo.com

City

-

Orcid

-

First Name

G. A.

Last Name

Abd El-Raheem

MiddleName

-

Affiliation

Professor of Hydraulics and Water Resources, Department of Civil Engineering, Assiut University, Assiut 71516, Egypt

Email

gabozeid@yahoo.com

City

-

Orcid

-

First Name

N. A.

Last Name

Ali

MiddleName

-

Affiliation

Professor of Hydraulics and Water Resources, Department of Civil Engineering, Assiut University, Assiut 71516, Egypt

Email

-

City

-

Orcid

-

First Name

A.

Last Name

Tominaga

MiddleName

-

Affiliation

Professor, Department of Civil Engineering, Nagoya Institute of Technology, Gokiso-cho, Nagoya 466-8555, Japan

Email

tominaga.akihiro@nitech.ac.jp

City

-

Orcid

-

First Name

Safia Mohamed

Last Name

Khodary

MiddleName

-

Affiliation

Post Graduate Student, Aswan University, Egypt

Email

-

City

-

Orcid

-

Volume

41

Article Issue

No 2

Related Issue

16841

Issue Date

2013-03-01

Receive Date

2012-10-07

Publish Date

2013-03-01

Page Start

302

Page End

320

Print ISSN

1687-0530

Online ISSN

2356-8550

Article File

JESAUN_Volume 41_Issue No 2_Pages 302-320.pdf

PDF . 954.8kB

Link

https://jesaun.journals.ekb.eg/article_114731.html

Detail API

https://jesaun.journals.ekb.eg/service?article_code=114731

Order

2

Type

Research Paper

Type Code

1,438

Publication Type

Journal

Publication Title

JES. Journal of Engineering Sciences

Publication Link

https://jesaun.journals.ekb.eg/

MainTitle

-

Details

Type

Article

Created At

23 Jan 2023