Bed roughness at high bed shear in open channels and pressurized pipes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F10%3A00178532" target="_blank" >RIV/68407700:21110/10:00178532 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Bed roughness at high bed shear in open channels and pressurized pipes

Popis výsledku v původním jazyce

The roughness is discussed of gravel bed streams at high bed shear caused by a flood flow carrying a substantial amount of sediments. An analogy is described with flows eroding a stationary deposit in enclosed pressurized pipes. Field measurements were carried out in two gravel-bed streams after a disastrous flood in June 2009. The measurements indicated that at the peak discharges the values of the gravel-bed roughness were considerably higher than predicted for gravel-bed streams in the literature. Itis suggested that the increase in bed roughness is due to additional friction exerted by transported sediments. A mechanism of friction due to grains transported as bed load is demonstrated on the results of flows in the upper-plane-bed regime through enclosed pipes.

Název v anglickém jazyce

Bed roughness at high bed shear in open channels and pressurized pipes

Popis výsledku anglicky

The roughness is discussed of gravel bed streams at high bed shear caused by a flood flow carrying a substantial amount of sediments. An analogy is described with flows eroding a stationary deposit in enclosed pressurized pipes. Field measurements were carried out in two gravel-bed streams after a disastrous flood in June 2009. The measurements indicated that at the peak discharges the values of the gravel-bed roughness were considerably higher than predicted for gravel-bed streams in the literature. Itis suggested that the increase in bed roughness is due to additional friction exerted by transported sediments. A mechanism of friction due to grains transported as bed load is demonstrated on the results of flows in the upper-plane-bed regime through enclosed pipes.

Druh

D - Stať ve sborníku

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

<a href="/cs/project/1M0579" target="_blank" >1M0579: Centrum integrovaného navrhování progresivních stavebních konstrukcí</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the International Conference on Fluvial Hydraulics

ISBN

978-3-939230-00-7

ISSN

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e-ISSN

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Počet stran výsledku

7

Strana od-do

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Název nakladatele

Technische Universität

Místo vydání

Braunschweig

Místo konání akce

Braunschweig

Datum konání akce

8. 9. 2010

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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