Hydraulic investigation of finite crested stepped spillways

In this paper, the hydraulic properties of the finite-crested stepped spillway (FCSS) including discharge coefficient (Cd) and the ratio of energy dissipation (EDR) were experimentally investigated. Results indicated that the Cd of the FCSS changes between 0.9 and 1.2, while the ratio of the upstrea...

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Autores principales:	Abbas Parsaie, AmirHamzeh Haghiabi
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	cascade weir energy dissipation flow measurement short crested weir Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
Acceso en línea:	https://doaj.org/article/6b9621c953e14c8ba26d13b973545002
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spelling	oai:doaj.org-article:6b9621c953e14c8ba26d13b9735450022021-11-06T07:19:29ZHydraulic investigation of finite crested stepped spillways1606-97491607-079810.2166/ws.2021.078https://doaj.org/article/6b9621c953e14c8ba26d13b9735450022021-08-01T00:00:00Zhttp://ws.iwaponline.com/content/21/5/2437https://doaj.org/toc/1606-9749https://doaj.org/toc/1607-0798In this paper, the hydraulic properties of the finite-crested stepped spillway (FCSS) including discharge coefficient (Cd) and the ratio of energy dissipation (EDR) were experimentally investigated. Results indicated that the Cd of the FCSS changes between 0.9 and 1.2, while the ratio of the upstream head to the length of the crest (hup/Lc) changes between 0.25 and 1.8. The hup/Lc is the main parameter affecting the Cd. The value hup/Lc equal to 0.6 is a good criterion for designing the crest of the FCSS. At this point, the Cd of FCSS is about 1.0. The performance of FCSS regarding the EDR changes between 95 and 40 percent. By increasing the discharge of flow and skimming flow formation, the performance of the FCSS related to energy dissipation is dramatically decreased. HIGHLIGHTS Based on the mentioned reports, the C_d of finite-crest weirs is more than the board and sharp-crested weirs, hence in this study, the use of it as the crest of a stepped spillway is suggested. In other words, finite-crested stepped spillways are proposed and their hydraulic properties including the C_d and their ability in energy dissipation are investigated.;Abbas ParsaieAmirHamzeh HaghiabiIWA Publishingarticlecascade weirenergy dissipationflow measurementshort crested weirWater supply for domestic and industrial purposesTD201-500River, lake, and water-supply engineering (General)TC401-506ENWater Supply, Vol 21, Iss 5, Pp 2437-2443 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cascade weir energy dissipation flow measurement short crested weir Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
spellingShingle	cascade weir energy dissipation flow measurement short crested weir Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506 Abbas Parsaie AmirHamzeh Haghiabi Hydraulic investigation of finite crested stepped spillways
description	In this paper, the hydraulic properties of the finite-crested stepped spillway (FCSS) including discharge coefficient (Cd) and the ratio of energy dissipation (EDR) were experimentally investigated. Results indicated that the Cd of the FCSS changes between 0.9 and 1.2, while the ratio of the upstream head to the length of the crest (hup/Lc) changes between 0.25 and 1.8. The hup/Lc is the main parameter affecting the Cd. The value hup/Lc equal to 0.6 is a good criterion for designing the crest of the FCSS. At this point, the Cd of FCSS is about 1.0. The performance of FCSS regarding the EDR changes between 95 and 40 percent. By increasing the discharge of flow and skimming flow formation, the performance of the FCSS related to energy dissipation is dramatically decreased. HIGHLIGHTS Based on the mentioned reports, the C_d of finite-crest weirs is more than the board and sharp-crested weirs, hence in this study, the use of it as the crest of a stepped spillway is suggested. In other words, finite-crested stepped spillways are proposed and their hydraulic properties including the C_d and their ability in energy dissipation are investigated.;
format	article
author	Abbas Parsaie AmirHamzeh Haghiabi
author_facet	Abbas Parsaie AmirHamzeh Haghiabi
author_sort	Abbas Parsaie
title	Hydraulic investigation of finite crested stepped spillways
title_short	Hydraulic investigation of finite crested stepped spillways
title_full	Hydraulic investigation of finite crested stepped spillways
title_fullStr	Hydraulic investigation of finite crested stepped spillways
title_full_unstemmed	Hydraulic investigation of finite crested stepped spillways
title_sort	hydraulic investigation of finite crested stepped spillways
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/6b9621c953e14c8ba26d13b973545002
work_keys_str_mv	AT abbasparsaie hydraulicinvestigationoffinitecrestedsteppedspillways AT amirhamzehhaghiabi hydraulicinvestigationoffinitecrestedsteppedspillways
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Hydraulic investigation of finite crested stepped spillways

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