Effect of flow resistance in open rectangular channel
The determination of flow resistance for open channels remains a challenge in practices. In this research, an experimental study was carried out to investigate the hydraulic roughness characteristics in an open channel. The experimental flume (10 m length, 0.30 m width and 0.46 height) was carried o...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2017
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| Online Access: | http://eprints.uthm.edu.my/3452/ http://eprints.uthm.edu.my/3452/1/AJ%202017%20%2852%29%20Effect%20of%20flow%20resistance%20in%20open%20rectangular%20channel.pdf |
| _version_ | 1848888023640440832 |
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| author | Ahmad, Noor Aliza Saiful Bahry, Saiful Iswal Md Ali, Zarina Mat Daud, Azra Munirah Musa, Sabariah |
| author_facet | Ahmad, Noor Aliza Saiful Bahry, Saiful Iswal Md Ali, Zarina Mat Daud, Azra Munirah Musa, Sabariah |
| author_sort | Ahmad, Noor Aliza |
| building | UTHM Institutional Repository |
| collection | Online Access |
| description | The determination of flow resistance for open channels remains a challenge in practices. In this research, an experimental study was carried out to investigate the hydraulic roughness characteristics in an open channel. The experimental flume (10 m length, 0.30 m width and 0.46 height) was carried out with two conditions ; contain gravel bed and without gravel bed (as controller). Blocks of concrete foam were fabricated and laid on the bed surface for providing uniformly roughened along the open channel. A velocity flow meter was used to quantify the average velocity, and other parameters such as cross-section, hydraulic radius, wetted perimeter, and channel slopes were also calculated. Finally, the flow resistance, n obtained using the flume with gravel bed surface is higher than the flume without gravel bed surface. The flow conditions were declared as subcritical as the Froude number is less than 1 for both conditions in the flume. As a conclusion, it was identified that the hydraulic roughness n, was influenced by the type bed roughness, flow rate and channel slope. |
| first_indexed | 2025-11-15T20:03:41Z |
| format | Article |
| id | uthm-3452 |
| institution | Universiti Tun Hussein Onn Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T20:03:41Z |
| publishDate | 2017 |
| publisher | EDP Sciences |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | uthm-34522021-11-17T06:55:34Z http://eprints.uthm.edu.my/3452/ Effect of flow resistance in open rectangular channel Ahmad, Noor Aliza Saiful Bahry, Saiful Iswal Md Ali, Zarina Mat Daud, Azra Munirah Musa, Sabariah TC Hydraulic engineering. Ocean engineering The determination of flow resistance for open channels remains a challenge in practices. In this research, an experimental study was carried out to investigate the hydraulic roughness characteristics in an open channel. The experimental flume (10 m length, 0.30 m width and 0.46 height) was carried out with two conditions ; contain gravel bed and without gravel bed (as controller). Blocks of concrete foam were fabricated and laid on the bed surface for providing uniformly roughened along the open channel. A velocity flow meter was used to quantify the average velocity, and other parameters such as cross-section, hydraulic radius, wetted perimeter, and channel slopes were also calculated. Finally, the flow resistance, n obtained using the flume with gravel bed surface is higher than the flume without gravel bed surface. The flow conditions were declared as subcritical as the Froude number is less than 1 for both conditions in the flume. As a conclusion, it was identified that the hydraulic roughness n, was influenced by the type bed roughness, flow rate and channel slope. EDP Sciences 2017 Article PeerReviewed text en http://eprints.uthm.edu.my/3452/1/AJ%202017%20%2852%29%20Effect%20of%20flow%20resistance%20in%20open%20rectangular%20channel.pdf Ahmad, Noor Aliza and Saiful Bahry, Saiful Iswal and Md Ali, Zarina and Mat Daud, Azra Munirah and Musa, Sabariah (2017) Effect of flow resistance in open rectangular channel. MATEC Web of Conferences, 97 (1107). pp. 1-6. ISSN 2261-236X http://10.1051/matecconf/20179701107 |
| spellingShingle | TC Hydraulic engineering. Ocean engineering Ahmad, Noor Aliza Saiful Bahry, Saiful Iswal Md Ali, Zarina Mat Daud, Azra Munirah Musa, Sabariah Effect of flow resistance in open rectangular channel |
| title | Effect of flow resistance in open rectangular channel |
| title_full | Effect of flow resistance in open rectangular channel |
| title_fullStr | Effect of flow resistance in open rectangular channel |
| title_full_unstemmed | Effect of flow resistance in open rectangular channel |
| title_short | Effect of flow resistance in open rectangular channel |
| title_sort | effect of flow resistance in open rectangular channel |
| topic | TC Hydraulic engineering. Ocean engineering |
| url | http://eprints.uthm.edu.my/3452/ http://eprints.uthm.edu.my/3452/ http://eprints.uthm.edu.my/3452/1/AJ%202017%20%2852%29%20Effect%20of%20flow%20resistance%20in%20open%20rectangular%20channel.pdf |