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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| Format: | Article |
| Language: | English |
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IWA Publishing
2021-08-01
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| Series: | Water Supply |
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| Online Access: | http://ws.iwaponline.com/content/21/5/2437 |
| _version_ | 1818429053057630208 |
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| author | Abbas Parsaie AmirHamzeh Haghiabi |
| author_facet | Abbas Parsaie AmirHamzeh Haghiabi |
| author_sort | Abbas Parsaie |
| collection | DOAJ |
| 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.; |
| first_indexed | 2024-12-14T15:11:24Z |
| format | Article |
| id | doaj.art-6b9621c953e14c8ba26d13b973545002 |
| institution | Directory Open Access Journal |
| issn | 1606-9749 1607-0798 |
| language | English |
| last_indexed | 2024-12-14T15:11:24Z |
| publishDate | 2021-08-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Supply |
| spelling | doaj.art-6b9621c953e14c8ba26d13b9735450022022-12-21T22:56:31ZengIWA PublishingWater Supply1606-97491607-07982021-08-012152437244310.2166/ws.2021.078078Hydraulic investigation of finite crested stepped spillwaysAbbas Parsaie0AmirHamzeh Haghiabi1 Hydro-Structure Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran Water Engineering Department, Lorestan University, Khorramabad, Iran 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.;http://ws.iwaponline.com/content/21/5/2437cascade weirenergy dissipationflow measurementshort crested weir |
| spellingShingle | Abbas Parsaie AmirHamzeh Haghiabi Hydraulic investigation of finite crested stepped spillways Water Supply cascade weir energy dissipation flow measurement short crested weir |
| title | 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_short | Hydraulic investigation of finite crested stepped spillways |
| title_sort | hydraulic investigation of finite crested stepped spillways |
| topic | cascade weir energy dissipation flow measurement short crested weir |
| url | http://ws.iwaponline.com/content/21/5/2437 |
| work_keys_str_mv | AT abbasparsaie hydraulicinvestigationoffinitecrestedsteppedspillways AT amirhamzehhaghiabi hydraulicinvestigationoffinitecrestedsteppedspillways |