Flow structures in asymmetric compound channels with emergent vegetation on divergent floodplain

Rahim, Ali Samadi; Yonesi, Hojjat Allah; Shahinejad, Babak; Podeh, Hasan Torabi; Azamattulla, Hazi Mohammad

doi:10.1007/s11600-022-00764-0

Artykuł - szczegóły

Tytuł artykułu

Flow structures in asymmetric compound channels with emergent vegetation on divergent floodplain

Autorzy

Rahim Ali Samadi , Yonesi Hojjat Allah , Shahinejad Babak , Podeh Hasan Torabi , Azamattulla Hazi Mohammad

Wybrane pełne teksty z tego czasopisma

https://www.springer.com/journal/11600

Identyfikatory

DOI

10.1007/s11600-022-00764-0

Warianty tytułu

Języki publikacji

Abstrakty

Knowledge and management of hydraulic processes including flow pattern, sediment transport, and food level prediction in natural rivers require proper understanding of interactions between food flow and vegetation in floodplains. This study examined the flow structures and turbulence parameters in an asymmetric non-prismatic compound channel with different vegetation densities in divergent floodplain. Due to existence of vegetation, the bed shear stresses in the middle and end of the divergence floodplain decrease 78.5% and 86%, respectively. Also, the depth-averaged velocity in vegetated floodplain diminishing by about 60% and 69%. The results revealed that the production and dissipation of Reynolds shear stresses and the formed shear layer depend on the vortex shedding frequency formed behind each single rod and is very unstable. Finally, some equations were presented to estimate friction factor based on rod Reynolds number, calculate the frequency of the vortices generated behind the elements and the local drag coefficient.

Słowa kluczowe

vegetation density drag force Reynolds number momentum exchange divergent floodplains

gęstość roślinności siła tarcia numer Reynoldsa wymiana pędu

Wydawca

Instytut Geofizyki PAN
Springer

Czasopismo

Acta Geophysica

Rocznik

2022

Tom

Vol. 70, no 5

Strony

2403--2421

Opis fizyczny

Bibliogr. 64 poz.

Twórcy

autor

Rahim Ali Samadi

College of Agriculture and Natural Resources, Water Engineering Department, Lorestan University, Lorestan, Iran

autor

Yonesi Hojjat Allah

yonesi.h@lu.ac.ir

College of Agriculture and Natural Resources, Water Engineering Department, Lorestan University, Lorestan, Iran

https://orcid.org/0000-0002-5145-6185

autor

Shahinejad Babak

College of Agriculture and Natural Resources, Water Engineering Department, Lorestan University, Lorestan, Iran

autor

Podeh Hasan Torabi

College of Agriculture and Natural Resources, Water Engineering Department, Lorestan University, Lorestan, Iran

autor

Azamattulla Hazi Mohammad

Department of Civil and Environmental Engineering, St. Augustine, Trinidad

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).

Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-80e0d6b0-2fc7-43ec-9a94-8dbca6ba91b4