Investigation of the free overfall for discharge measurement in stone bed triangular channels
This study utilizes the freefall as a simple and useful tool for measuring end depth discharge EDD in triangular channels having stone beds. For this task, forty-five triangular channel models are constructed and examined all having 360 cm length and end drop fall of 20 cm. In these channel models,...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-01-01
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| Series: | Ain Shams Engineering Journal |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2090447923002289 |
| _version_ | 1797345931300962304 |
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| author | Bahzad Mohammad Ali Noori Chnen Jalal Mohammed |
| author_facet | Bahzad Mohammad Ali Noori Chnen Jalal Mohammed |
| author_sort | Bahzad Mohammad Ali Noori |
| collection | DOAJ |
| description | This study utilizes the freefall as a simple and useful tool for measuring end depth discharge EDD in triangular channels having stone beds. For this task, forty-five triangular channel models are constructed and examined all having 360 cm length and end drop fall of 20 cm. In these channel models, three channel side slopes z = 0.7, 1.0 and 1.3, five bed slopes St = 0.00, 0.0033, 0.005, 0.010 and 0.020 and three bed stone diameters ds = 5 mm, 10 mm and 15 mm are tested. The laboratory results demonstrated straight line relationships for the variation of end depth ye with critical depth yc and the variation of end depth with uniform normal depth yn for different values of z, St and ds tested in this study, while, the relation between ye/yc and bed slope St showed a quadratic expression. Moreover, the relationship for the dimensionless discharge with both channel bed slope St and the ratio of end water depth ye to bed stone diameter ds (ye/ds) has been presented by a simple empirical power equation with high determination coefficient which can be applied for subcritical and supercritical states of flow for the range of upstream Froude number Frn between 0.14 and 1.27. |
| first_indexed | 2024-03-08T11:25:58Z |
| format | Article |
| id | doaj.art-9c27062f98c04d11a1ade03a206f9ff0 |
| institution | Directory Open Access Journal |
| issn | 2090-4479 |
| language | English |
| last_indexed | 2024-03-08T11:25:58Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ain Shams Engineering Journal |
| spelling | doaj.art-9c27062f98c04d11a1ade03a206f9ff02024-01-26T05:33:08ZengElsevierAin Shams Engineering Journal2090-44792024-01-01151102339Investigation of the free overfall for discharge measurement in stone bed triangular channelsBahzad Mohammad Ali Noori0Chnen Jalal Mohammed1Hydraulic Structures, Civil Engineering Department, Engineering College, Duhok University, Iraq; Corresponding author.Water Resources Department, Engineering College, Duhok University, IraqThis study utilizes the freefall as a simple and useful tool for measuring end depth discharge EDD in triangular channels having stone beds. For this task, forty-five triangular channel models are constructed and examined all having 360 cm length and end drop fall of 20 cm. In these channel models, three channel side slopes z = 0.7, 1.0 and 1.3, five bed slopes St = 0.00, 0.0033, 0.005, 0.010 and 0.020 and three bed stone diameters ds = 5 mm, 10 mm and 15 mm are tested. The laboratory results demonstrated straight line relationships for the variation of end depth ye with critical depth yc and the variation of end depth with uniform normal depth yn for different values of z, St and ds tested in this study, while, the relation between ye/yc and bed slope St showed a quadratic expression. Moreover, the relationship for the dimensionless discharge with both channel bed slope St and the ratio of end water depth ye to bed stone diameter ds (ye/ds) has been presented by a simple empirical power equation with high determination coefficient which can be applied for subcritical and supercritical states of flow for the range of upstream Froude number Frn between 0.14 and 1.27.http://www.sciencedirect.com/science/article/pii/S2090447923002289Discharge measurementEnd depth ratioFree overfallStone bedTriangular channels |
| spellingShingle | Bahzad Mohammad Ali Noori Chnen Jalal Mohammed Investigation of the free overfall for discharge measurement in stone bed triangular channels Ain Shams Engineering Journal Discharge measurement End depth ratio Free overfall Stone bed Triangular channels |
| title | Investigation of the free overfall for discharge measurement in stone bed triangular channels |
| title_full | Investigation of the free overfall for discharge measurement in stone bed triangular channels |
| title_fullStr | Investigation of the free overfall for discharge measurement in stone bed triangular channels |
| title_full_unstemmed | Investigation of the free overfall for discharge measurement in stone bed triangular channels |
| title_short | Investigation of the free overfall for discharge measurement in stone bed triangular channels |
| title_sort | investigation of the free overfall for discharge measurement in stone bed triangular channels |
| topic | Discharge measurement End depth ratio Free overfall Stone bed Triangular channels |
| url | http://www.sciencedirect.com/science/article/pii/S2090447923002289 |
| work_keys_str_mv | AT bahzadmohammadalinoori investigationofthefreeoverfallfordischargemeasurementinstonebedtriangularchannels AT chnenjalalmohammed investigationofthefreeoverfallfordischargemeasurementinstonebedtriangularchannels |