Turbulence intensity in open-channel flows with submerged flexible vegetation.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A number of empirical and semi-empirical models for vertical profiles of turbulence intensities in smooth- and rough-bed flows, such as gravel-bed rivers, have been developed in recent years. However, no models describing turbulence intensity profiles in vegetated channels have yet been proposed. This paper presents a new multi-segment approach used to model turbulence intensities in vegetated channels. Within this framework, different concepts are applied to specific flow regions and the overall turbulence intensity profile is represented with a set of linked segments. As a result, a set of turbulence intensity models for flow regions within and above the vegetation canopy are given. The models have been tested using extensive laboratory experiments covering wide ranges of background flow and vegetation parameters. The analysis also focused on identification of the effects of flow and roughness parameters on the model coefficients and overall performance.
Original languageEnglish
Title of host publicationProceedings of the 36th Congress of IAHR, The Hague, The Netherlands
EditorsA. Mynett
PublisherIAHR
Number of pages7
ISBN (Print)9781510824348
Publication statusPublished - 1 Aug 2016
Event36th IAHR World Congress 2015: Deltas of the Future and What Happens Upstream - The Hague, Netherlands
Duration: 28 Jun 20153 Jul 2015

Conference

Conference36th IAHR World Congress 2015
CountryNetherlands
CityThe Hague
Period28/06/153/07/15

Fingerprint

open channel flow
turbulence
vegetation
river bed
vertical profile
roughness
gravel
canopy

Cite this

Nikora, N., & Nikora, V. (2016). Turbulence intensity in open-channel flows with submerged flexible vegetation. In A. Mynett (Ed.), Proceedings of the 36th Congress of IAHR, The Hague, The Netherlands [521] IAHR.

Turbulence intensity in open-channel flows with submerged flexible vegetation. / Nikora, Nina; Nikora, Vladimir.

Proceedings of the 36th Congress of IAHR, The Hague, The Netherlands. ed. / A. Mynett. IAHR, 2016. 521.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Nikora, N & Nikora, V 2016, Turbulence intensity in open-channel flows with submerged flexible vegetation. in A Mynett (ed.), Proceedings of the 36th Congress of IAHR, The Hague, The Netherlands., 521, IAHR, 36th IAHR World Congress 2015, The Hague, Netherlands, 28/06/15.
Nikora N, Nikora V. Turbulence intensity in open-channel flows with submerged flexible vegetation. In Mynett A, editor, Proceedings of the 36th Congress of IAHR, The Hague, The Netherlands. IAHR. 2016. 521
Nikora, Nina ; Nikora, Vladimir. / Turbulence intensity in open-channel flows with submerged flexible vegetation. Proceedings of the 36th Congress of IAHR, The Hague, The Netherlands. editor / A. Mynett. IAHR, 2016.
@inproceedings{5676563d307d4de8ae2b8934fb91f2aa,
title = "Turbulence intensity in open-channel flows with submerged flexible vegetation.",
abstract = "A number of empirical and semi-empirical models for vertical profiles of turbulence intensities in smooth- and rough-bed flows, such as gravel-bed rivers, have been developed in recent years. However, no models describing turbulence intensity profiles in vegetated channels have yet been proposed. This paper presents a new multi-segment approach used to model turbulence intensities in vegetated channels. Within this framework, different concepts are applied to specific flow regions and the overall turbulence intensity profile is represented with a set of linked segments. As a result, a set of turbulence intensity models for flow regions within and above the vegetation canopy are given. The models have been tested using extensive laboratory experiments covering wide ranges of background flow and vegetation parameters. The analysis also focused on identification of the effects of flow and roughness parameters on the model coefficients and overall performance.",
author = "Nina Nikora and Vladimir Nikora",
year = "2016",
month = "8",
day = "1",
language = "English",
isbn = "9781510824348",
editor = "A. Mynett",
booktitle = "Proceedings of the 36th Congress of IAHR, The Hague, The Netherlands",
publisher = "IAHR",

}

TY - GEN

T1 - Turbulence intensity in open-channel flows with submerged flexible vegetation.

AU - Nikora, Nina

AU - Nikora, Vladimir

PY - 2016/8/1

Y1 - 2016/8/1

N2 - A number of empirical and semi-empirical models for vertical profiles of turbulence intensities in smooth- and rough-bed flows, such as gravel-bed rivers, have been developed in recent years. However, no models describing turbulence intensity profiles in vegetated channels have yet been proposed. This paper presents a new multi-segment approach used to model turbulence intensities in vegetated channels. Within this framework, different concepts are applied to specific flow regions and the overall turbulence intensity profile is represented with a set of linked segments. As a result, a set of turbulence intensity models for flow regions within and above the vegetation canopy are given. The models have been tested using extensive laboratory experiments covering wide ranges of background flow and vegetation parameters. The analysis also focused on identification of the effects of flow and roughness parameters on the model coefficients and overall performance.

AB - A number of empirical and semi-empirical models for vertical profiles of turbulence intensities in smooth- and rough-bed flows, such as gravel-bed rivers, have been developed in recent years. However, no models describing turbulence intensity profiles in vegetated channels have yet been proposed. This paper presents a new multi-segment approach used to model turbulence intensities in vegetated channels. Within this framework, different concepts are applied to specific flow regions and the overall turbulence intensity profile is represented with a set of linked segments. As a result, a set of turbulence intensity models for flow regions within and above the vegetation canopy are given. The models have been tested using extensive laboratory experiments covering wide ranges of background flow and vegetation parameters. The analysis also focused on identification of the effects of flow and roughness parameters on the model coefficients and overall performance.

M3 - Conference contribution

SN - 9781510824348

BT - Proceedings of the 36th Congress of IAHR, The Hague, The Netherlands

A2 - Mynett, A.

PB - IAHR

ER -