|Table of Contents|

 Saeid Shabanlou,Hamed Azimi,Isa Ebtehaj,et al.Determining the Scour Dimensions Around Submerged Vanes in a 180° Bend with the Gene Expression Programming Technique[J].Journal of Marine Science and Application,2018,(2):233-240.[doi:10.1007/s11804-018-0025-5]
Click and Copy

Determining the Scour Dimensions Around Submerged Vanes in a 180° Bend with the Gene Expression Programming Technique


Determining the Scour Dimensions Around Submerged Vanes in a 180° Bend with the Gene Expression Programming Technique
Saeid Shabanlou1 Hamed Azimi23 Isa Ebtehaj23 Hossein Bonakdari23
Saeid Shabanlou1 Hamed Azimi23 Isa Ebtehaj23 Hossein Bonakdari23
1 Department of Water Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah 67146, Iran;
2 Department of Civil Engineering, Razi University, Kermanshah 67146, Iran;
3 Environmental Research Center, Razi University, Kermanshah 67146, Iran
180° bendSubmerged vanesScour hole volumeGene expression programmingPartial derivative sensitivity analysis
Submerged vanes are installed on rivers and channel beds to protect the outer bank bends from scouring. Also, local scouring occurs around the submerged vanes over time, and identifying the effective factors on the scouring phenomena around these submerged vanes is one of the important issues in river engineering. The most important aim of this study is investigation of scour pattern around submerged vanes located in 180° bend experimentally and numerically. Firstly, the effects of various parameters such as the Froude number (Fr), angle of submerged vanes to the flow (α), angle of submerged vane location in the bend (θ), distance between submerged vanes (d), height (H), and length (L) of the vanes on the dimensionless volume of the scour hole were experimentally studied. The submerged vanes were installed on a 180° bend whose central radius and channel width were 2.8 and 0.6 m, respectively. By reducing the Froude number, the scour hole volume decreased. For all Froude numbers, the biggest scour hole formed at θ=15°. In all models, by increasing the Froude number, the scour hole volume significantly increases. In addition, by increasing the submerged vanes’ length and height, the scour hole dimensions also grow. Secondly, using gene expression programming (GEP), a relationship for determining the scour hole volume around the submerged vanes was provided. For this model, the determination coefficients (R2) for the training and test modes were computed as 0.91 and 0.9, respectively. In addition, this study performed partial derivative sensitivity analysis (PDSA). According to the results, the PDSA was calculated as positive for all input variables.


Azimi H, Bonakdari H, Ebtehaj I (2017a) A highly efficient gene expression programming model for predicting the discharge coefficient in a side weir along a trapezoidal canal. Irrig Drain 66(4):655-666.https://doi.org/10.1002/ird.2127
Azimi H, Bonakdari H, Ebtehaj I, Talesh SHA, Michelson DG, Jamali A (2017b) Evolutionary Pareto optimization of an ANFIS network for modeling scour at pile groups in clear water condition. Fuzzy Sets Syst 319:50-69. https://doi.org/10.1016/j.fss.2016.10.010
Bejestan M, Azizi R (2012) Experimental investigation of scour depth at the edge of different submerged vane shapes. World Environ Water Resour Congress 1376-1385. https://doi.org/10.1061/9780784412312.138
Ebtehaj I, Bonakdari H, Zaji AH, Azimi H, Sharifi A (2015) Gene expression programming to predict the discharge coefficient in rectangular side weirs. Appl Soft Comput 35:618-628. https://doi.org/10.1016/j.asoc.2015.07.003
Ferreira C (2001) Gene expression programming:a new adaptive algorithm for solving problems. Complex Syst 13(2):87-129
Gupta UP, Ojha CSP, Sharma N (2010) Enhancing utility of submerged vanes with collar. J Hydraul Eng 136(9):651-655. https://doi.org/10.1061/(ASCE)HY.1943-7900.0000212
Koza JR (1992) Genetic programming:on the programming of computers by means of natural selection. MIT Press, Cambridge 680 p
Marelius F, Sinha SK (1998) Experimental investigation of flow past submerged vanes. J Hydraul Eng 124(5):542-545. https://doi.org/10.1061/(ASCE)0733-9429(1998)124:5(542)
Nakato T, Ogden FL (1998) Sediment control at water intakes along sandbed rivers. J Hydraul Eng 124(6):589-596. https://doi.org/10.1061/(ASCE)0733-9429(1998)124:6(589)
Odgaard AJ, Kennedy JF (1983) River-bend bank protection by submerged vanes. J Hydraul Eng 109(8):1161-1173. https://doi.org/10.1061/(asce)0733-9429(1983)109:8(1161)
Odgaard AJ, Mosconi CE (1987) Stream bank protection by submerged vanes. J Hydraul Eng 113(4):520-537. https://doi.org/10.1061/(asce)0733-9429(1987)113:4(520)
Odgaard AJ, Spoljaric A (1986) Sediment control by submerged vanes. J Hydraul Eng 112(12):1164-1181. https://doi.org/10.1061/(asce)0733-9429(1986)112:12(1164)
Odgaard J, Wang Y (1991a) Sediment management with submerged vanes. I:theory. J Hydraul Eng 117(3):267-283. https://doi.org/10.1061/(ASCE)0733-9429(1991)117:3(267)
Odgaard J, Wang Y (1991b) Sediment management with submerged vanes. Ⅱ:applications. J Hydraul Eng 117(3):284-302. https://doi.org/10.1061/(ASCE)0733-9429(1991)117:3(284)
Ouyang HT (2009) Investigation on the dimensions and shape of a submerged vane for sediment management in alluvial channels. J Hydraul Eng 135(3):209-217. https://doi.org/10.1061/(ASCE)0733-9429(2009)135:3(209)
Rozovskii IL (1957) Flow of water in bend of open channel. Academy of sciences of the Ukrainian SSR, Institute of Hydraulic Engineering
Sinha SK, Marelius F (2000) Analysis of flow past submerged vane. J Hydraul Res 38(1):65-71. https://doi.org/10.1080/00221680009498360
Tan SK, Yu G, Lim SY, Ong MC (2005) Flow structure and sediment motion around submerged vanes in open channel. J Waterw Port Coast Ocean Eng 131(3):132-136. https://doi.org/10.1061/(ASCE)0733-950X(2005)131:3(132)
Wang Y (1991) Sediment control with submerged vanes. PhD thesis, University of Iowa, Iowa
Wang Y, Odgaard J, Melville BW, Jain SC (1996) Sediment control at water intakes. J Hydraul Eng 122(6):353-356. https://doi.org/10.1061/(ASCE)0733-9429(1996)122:6(353)


Received date:2017-07-03;Accepted date:2017-11-13。
Corresponding author:Saeid Shabanlou,saeid.shabanlou@gmail.com
Last Update: 2018-10-11