Open AccessThe Hydraulic Jump Formed Downstream a Stepped Gabion Weir: An Experimental Study
Author(s) -
Ali Mekki Al-Fawzy,
Kadhim Naief Al-Taee,
Fadhil M. Al-Mohammed,
Ali Hassan Hommadi
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/978/1/012018
Subject(s) - weir , hydraulic jump , flume , dimensionless quantity , jump , geotechnical engineering , geology , hydrology (agriculture) , flow (mathematics) , mathematics , mechanics , geometry , physics , geography , cartography , quantum mechanics
The current study focus on the effect of using stepped gabion weir in a laboratory channel on the hydraulic jump distance which form at its toe. A series of 175 operation tests and 25 laboratory experiments were conducted by using a laboratory flume 10 m long, 0.3 m wide, and 0.5 m deep. The tested gabions had different five lengths 0.72 m, 0.84 m, 0.96 m, 1.08 m, and 1.20 m respectively, and the material used to fill the gabions was natural quarry mono graded gravel in five different sample sizes of diameters ranged between (09.5-14.0) mm, (14.0-19.0) mm, (19.0-25.0) mm, (25.0-37.5) mm, and (37.5-50.0) mm. The operation flow rate values ranged between 2.33*10 -3 to 50.00*10 -3 m 3 /s/m. Dimensional analysis was used to generate dimensionless parameters, and correlated them using the Buckingham Pi-Theorem. The results of this study showed that the hydraulic jump distance increases by increasing the flow rate value, but increasing the values of both of the gravel sample used and the total length of the weir have an undular effect on the hydraulic jump distance.