Innovative approach to the design of stilling basin: lmprovemen t of fish migration and scour utilization for energy dissipation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00342419" target="_blank" >RIV/68407700:21110/20:00342419 - 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

Innovative approach to the design of stilling basin: lmprovemen t of fish migration and scour utilization for energy dissipation

Popis výsledku v původním jazyce

An original technical solution was designed for the currently prepared project Dry Retention Reservoir Mělčany (Czech Republic). The approach permits migration permeability and thus meets the current environmental requirements for newly built in-stream hydraulic structures. The design envisages the construction of a 19-meter-high earthfill dam with a combined structure, which contains a migration passage, bottom outlets and spillway. Thus, it allows the protection of the downstream area up to 100-years-flood discharge. The approach to the stilling basin design downstream the combined object is unique. The concrete construction of the 6-meter deep stilling basin is filled with a riprap in which a shallow river channel is modelled to ensure migration permeability and continues through the dam. The riprap material has been designed to resist normal flow rates and, in flood situations, to create an equally large scour that will effectively dissipate the flowing water energy. A variety of known formulas and approaches can be used to predict the size and depth of a scour. However, the amplitude of the results is so wide that the results were unclear and unusable for the design of a particular situation. A physical hydraulic model was created to verify and optimize the proposed stone size and the expected range of scours, and finally, the results were generalized. Conclusions of the hydraulic research confirmed the proposed solution as reliable in terms of dissipating the kinetic energy of water concerning the stability of the downstream river channel.

Název v anglickém jazyce

Innovative approach to the design of stilling basin: lmprovemen t of fish migration and scour utilization for energy dissipation

Popis výsledku anglicky

An original technical solution was designed for the currently prepared project Dry Retention Reservoir Mělčany (Czech Republic). The approach permits migration permeability and thus meets the current environmental requirements for newly built in-stream hydraulic structures. The design envisages the construction of a 19-meter-high earthfill dam with a combined structure, which contains a migration passage, bottom outlets and spillway. Thus, it allows the protection of the downstream area up to 100-years-flood discharge. The approach to the stilling basin design downstream the combined object is unique. The concrete construction of the 6-meter deep stilling basin is filled with a riprap in which a shallow river channel is modelled to ensure migration permeability and continues through the dam. The riprap material has been designed to resist normal flow rates and, in flood situations, to create an equally large scour that will effectively dissipate the flowing water energy. A variety of known formulas and approaches can be used to predict the size and depth of a scour. However, the amplitude of the results is so wide that the results were unclear and unusable for the design of a particular situation. A physical hydraulic model was created to verify and optimize the proposed stone size and the expected range of scours, and finally, the results were generalized. Conclusions of the hydraulic research confirmed the proposed solution as reliable in terms of dissipating the kinetic energy of water concerning the stability of the downstream river channel.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil 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

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

River Flow 2020: Proceedings of the 10th Conference on Fluvial Hydraulics

ISBN

978-0-367-62773-7

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

778-785

Název nakladatele

CRC Press/Balkema

Místo vydání

Leiden

Místo konání akce

Delft

Datum konání akce

7. 7. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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