The (d50) Criterion in Estimating the Bedload in Earthen Channels
It is a common tradition to depend on (d50) of the bed-material to estimate the sediment load in earthen channels and consider it appropriate to yield results of acceptable accuracy.The aforementioned concept is reviewed in this research through applications on a practical case study constituted ni...
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| Format: | Article |
| Language: | Arabic |
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Mustansiriyah University/College of Engineering
2005-06-01
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| Series: | Journal of Engineering and Sustainable Development |
| Subjects: | |
| Online Access: | https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1849 |
| _version_ | 1811232968901918720 |
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| author | Abdulhadi Ahmed Aziz Al-Delewy |
| author_facet | Abdulhadi Ahmed Aziz Al-Delewy |
| author_sort | Abdulhadi Ahmed Aziz Al-Delewy |
| collection | DOAJ |
| description |
It is a common tradition to depend on (d50) of the bed-material to estimate the sediment load in earthen channels and consider it appropriate to yield results of acceptable accuracy.The aforementioned concept is reviewed in this research through applications on a practical case study constituted nine existing channels, six of which are in the Middle-Euphrates area. Grain-size distribution analyses have been performed for the bed material of those six channels for the purposes of this research, whereas the available data for the other three were considered. The Einstein [1950] approach for estimating the bedload (as developed by Al-Delewy [2003] to make the approach fully amenable for solution by a computer) is used in this respect. Besides, some new additions were necessary to satisfy the requirements of the research.The bed material of each example channel has been classified into six size-classes. Estimates of bedload were performed, once based on (d50) and then for the classified soil; (PR) has been used to denote the ratio of the former to the latter.Despite that no rigid conclusion can be abstracted from relatively limited applications, the research indicated that the (d50) criterion in some cases is not more than a very rough indicator, particularly with very fine or coarse beds, and especially with mild bed- slopes; the ratio (PR) ranged from (0 %) to (1718 %).An indicator of the classified sizes, called texture coefficient, (TC), has been introduced in the research.....
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| first_indexed | 2024-04-12T11:13:16Z |
| format | Article |
| id | doaj.art-388c1ea277b848dda6e8ff3a7a67b41c |
| institution | Directory Open Access Journal |
| issn | 2520-0917 2520-0925 |
| language | Arabic |
| last_indexed | 2024-04-12T11:13:16Z |
| publishDate | 2005-06-01 |
| publisher | Mustansiriyah University/College of Engineering |
| record_format | Article |
| series | Journal of Engineering and Sustainable Development |
| spelling | doaj.art-388c1ea277b848dda6e8ff3a7a67b41c2022-12-22T03:35:34ZaraMustansiriyah University/College of EngineeringJournal of Engineering and Sustainable Development2520-09172520-09252005-06-0192The (d50) Criterion in Estimating the Bedload in Earthen ChannelsAbdulhadi Ahmed Aziz Al-Delewy0Civil Engineering Department, College of Engineering, Babylon University, Hilla, Iraq It is a common tradition to depend on (d50) of the bed-material to estimate the sediment load in earthen channels and consider it appropriate to yield results of acceptable accuracy.The aforementioned concept is reviewed in this research through applications on a practical case study constituted nine existing channels, six of which are in the Middle-Euphrates area. Grain-size distribution analyses have been performed for the bed material of those six channels for the purposes of this research, whereas the available data for the other three were considered. The Einstein [1950] approach for estimating the bedload (as developed by Al-Delewy [2003] to make the approach fully amenable for solution by a computer) is used in this respect. Besides, some new additions were necessary to satisfy the requirements of the research.The bed material of each example channel has been classified into six size-classes. Estimates of bedload were performed, once based on (d50) and then for the classified soil; (PR) has been used to denote the ratio of the former to the latter.Despite that no rigid conclusion can be abstracted from relatively limited applications, the research indicated that the (d50) criterion in some cases is not more than a very rough indicator, particularly with very fine or coarse beds, and especially with mild bed- slopes; the ratio (PR) ranged from (0 %) to (1718 %).An indicator of the classified sizes, called texture coefficient, (TC), has been introduced in the research..... https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1849. |
| spellingShingle | Abdulhadi Ahmed Aziz Al-Delewy The (d50) Criterion in Estimating the Bedload in Earthen Channels Journal of Engineering and Sustainable Development . |
| title | The (d50) Criterion in Estimating the Bedload in Earthen Channels |
| title_full | The (d50) Criterion in Estimating the Bedload in Earthen Channels |
| title_fullStr | The (d50) Criterion in Estimating the Bedload in Earthen Channels |
| title_full_unstemmed | The (d50) Criterion in Estimating the Bedload in Earthen Channels |
| title_short | The (d50) Criterion in Estimating the Bedload in Earthen Channels |
| title_sort | d50 criterion in estimating the bedload in earthen channels |
| topic | . |
| url | https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1849 |
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