Observation of mixed grain size sediment transport rate and streamwise nearbed flow velocity in a gravel-worked bed
This experiment observed the prediction of sediment movement for channel bed composed of mixed grain size and its relationship with nearbed turbulence. Changes in transport rate at different time elapsed was obtained by observing bedload transport rate and associated them with streamwise nearbed flo...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2023-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/101/e3sconf_icdmm2023_11004.pdf |
| _version_ | 1797345035372462080 |
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| author | Saadi Yusron Suroso Agus Negara I. Dewa Gede Jaya Salehudin |
| author_facet | Saadi Yusron Suroso Agus Negara I. Dewa Gede Jaya Salehudin |
| author_sort | Saadi Yusron |
| collection | DOAJ |
| description | This experiment observed the prediction of sediment movement for channel bed composed of mixed grain size and its relationship with nearbed turbulence. Changes in transport rate at different time elapsed was obtained by observing bedload transport rate and associated them with streamwise nearbed flow velocity. Regardless of the shape and duration, observations indicate that the total amounts of transported bedload during the antecedent flow hydrographs are the best indicators of bed stability as observed in the stability hydrographs. Experiments also suggest that high turbulence flow caused by dispersion in the average streamwise nearbed velocity roughly disrupted the bed, allowing dislodgement of coarser grain and preventing finer materials from being fully sheltered. As the result the production of transported material was very significantly increased. Systematic change is presumably absent in the variation of average instantaneous shear stress following an increasing and decreasing discharge as evidenced by average streamwise nearbed flow velocity during different pattern of antecedent flow hydrographs. The variations that produced slightly different fashion in transport rate led to the inference that the major difference in the transport rate response during stability tests were created by unsteady flow hydrographs with rapid increase and rapid decrease. |
| first_indexed | 2024-03-08T11:11:36Z |
| format | Article |
| id | doaj.art-9ed6c7756ce3453192936f17d8da24b2 |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-03-08T11:11:36Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-9ed6c7756ce3453192936f17d8da24b22024-01-26T10:41:45ZengEDP SciencesE3S Web of Conferences2267-12422023-01-014641100410.1051/e3sconf/202346411004e3sconf_icdmm2023_11004Observation of mixed grain size sediment transport rate and streamwise nearbed flow velocity in a gravel-worked bedSaadi Yusron0Suroso Agus1Negara I. Dewa Gede Jaya2Salehudin3Researcher, Center for Disaster Risk Management, University of MataramLecturer, Department of Civil Engineering, University of MataramLecturer, Department of Civil Engineering, University of MataramLecturer, Department of Civil Engineering, University of MataramThis experiment observed the prediction of sediment movement for channel bed composed of mixed grain size and its relationship with nearbed turbulence. Changes in transport rate at different time elapsed was obtained by observing bedload transport rate and associated them with streamwise nearbed flow velocity. Regardless of the shape and duration, observations indicate that the total amounts of transported bedload during the antecedent flow hydrographs are the best indicators of bed stability as observed in the stability hydrographs. Experiments also suggest that high turbulence flow caused by dispersion in the average streamwise nearbed velocity roughly disrupted the bed, allowing dislodgement of coarser grain and preventing finer materials from being fully sheltered. As the result the production of transported material was very significantly increased. Systematic change is presumably absent in the variation of average instantaneous shear stress following an increasing and decreasing discharge as evidenced by average streamwise nearbed flow velocity during different pattern of antecedent flow hydrographs. The variations that produced slightly different fashion in transport rate led to the inference that the major difference in the transport rate response during stability tests were created by unsteady flow hydrographs with rapid increase and rapid decrease.https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/101/e3sconf_icdmm2023_11004.pdf |
| spellingShingle | Saadi Yusron Suroso Agus Negara I. Dewa Gede Jaya Salehudin Observation of mixed grain size sediment transport rate and streamwise nearbed flow velocity in a gravel-worked bed E3S Web of Conferences |
| title | Observation of mixed grain size sediment transport rate and streamwise nearbed flow velocity in a gravel-worked bed |
| title_full | Observation of mixed grain size sediment transport rate and streamwise nearbed flow velocity in a gravel-worked bed |
| title_fullStr | Observation of mixed grain size sediment transport rate and streamwise nearbed flow velocity in a gravel-worked bed |
| title_full_unstemmed | Observation of mixed grain size sediment transport rate and streamwise nearbed flow velocity in a gravel-worked bed |
| title_short | Observation of mixed grain size sediment transport rate and streamwise nearbed flow velocity in a gravel-worked bed |
| title_sort | observation of mixed grain size sediment transport rate and streamwise nearbed flow velocity in a gravel worked bed |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/101/e3sconf_icdmm2023_11004.pdf |
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