Effect of Energy Dissipation on Scour Hole Development Downstream of the Chute

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F21%3A00353137" target="_blank" >RIV/68407700:21110/21:00353137 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1088/1755-1315/906/1/012117" target="_blank" >https://doi.org/10.1088/1755-1315/906/1/012117</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1755-1315/906/1/012117" target="_blank" >10.1088/1755-1315/906/1/012117</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of Energy Dissipation on Scour Hole Development Downstream of the Chute

Popis výsledku v původním jazyce

An energy dissipation on hydraulic structures is a scientifically highly examined field of study. Gained knowledge can be used to ensure the safety of the hydraulic structures and the channels which is crucial during floods. Above that, those structures are also part of the critical infrastructure therefore their function is necessary. It is assumed that in the Czech Republic the precipitation distribution is changing due to climate change thus episodes of extreme floods may be observed more often. The paper brings brand new knowledge on the kinetic energy dissipation on the chute and in the stilling basin and its impact on the riverbed scour hole development. The presented research was conducted in the WMEC of CTU in Prague. The research aimed to examine the energy dissipation mechanism on different geometric modifications of the construction of spillway chute and stilling basin and its impact on the process of scour hole development. These various types of dams’ flood safety equipment were examined in the hydraulic laboratory: form of the spillway without any stilling basin; form of the spillway and the stilling basin; the chute width was reduced, and the stilling basin had the full width; steps were added on the narrowed chute and the and stilling basin had the full width; only the spillway crest was reduced to a half-width; only the stilling basin width was smoothly reduced; the chute’s width was smoothly reduced along the chute and the stilling basin had full width; the chute’s width was smoothly reduced along the chute and the stilling basin had the width reduced to a half. The flow, water levels, scour hole and deposit dimensions were measured. Then the amount of energy dissipated was computed. The correlation and connection between energy dissipation and scour hole development was investigated. These outcomes can be used as a recommendation of an appropriate construction design to provide better flood safety of the hydraulic structure.

Název v anglickém jazyce

Effect of Energy Dissipation on Scour Hole Development Downstream of the Chute

Popis výsledku anglicky

An energy dissipation on hydraulic structures is a scientifically highly examined field of study. Gained knowledge can be used to ensure the safety of the hydraulic structures and the channels which is crucial during floods. Above that, those structures are also part of the critical infrastructure therefore their function is necessary. It is assumed that in the Czech Republic the precipitation distribution is changing due to climate change thus episodes of extreme floods may be observed more often. The paper brings brand new knowledge on the kinetic energy dissipation on the chute and in the stilling basin and its impact on the riverbed scour hole development. The presented research was conducted in the WMEC of CTU in Prague. The research aimed to examine the energy dissipation mechanism on different geometric modifications of the construction of spillway chute and stilling basin and its impact on the process of scour hole development. These various types of dams’ flood safety equipment were examined in the hydraulic laboratory: form of the spillway without any stilling basin; form of the spillway and the stilling basin; the chute width was reduced, and the stilling basin had the full width; steps were added on the narrowed chute and the and stilling basin had the full width; only the spillway crest was reduced to a half-width; only the stilling basin width was smoothly reduced; the chute’s width was smoothly reduced along the chute and the stilling basin had full width; the chute’s width was smoothly reduced along the chute and the stilling basin had the width reduced to a half. The flow, water levels, scour hole and deposit dimensions were measured. Then the amount of energy dissipated was computed. The correlation and connection between energy dissipation and scour hole development was investigated. These outcomes can be used as a recommendation of an appropriate construction design to provide better flood safety of the hydraulic structure.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

<a href="/cs/project/VI20192022121" target="_blank" >VI20192022121: Zvýšení odolnosti přehrad a nádrží jako klíčových prvků vodohospodářské infrastruktury</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název statě ve sborníku

7th World Multidisciplinary Earth Sciences Symposium - WMESS 2021

ISBN

—

ISSN

1755-1315

e-ISSN

1755-1315

Počet stran výsledku

9

Strana od-do

1-9

Název nakladatele

IOP Publishing Ltd.

Místo vydání

Bristol

Místo konání akce

Praha

Datum konání akce

6. 9. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—