Effect of Various Groins in a Series on Channel Bed Morphology: an Experimental Investigation


  • Alauddin Mohammed Professor, Civil Engineering Department, Dhaka University of Engineering & Technology (DUET), Gazipur, Bangladesh
  • Rokshana Pervin
  • Md. Zakir Hasan




Bank erosion, Combined groin, Deposition, Groin, Scour, Shore protection


Alluvial rivers in Bangladesh are unstable keep changing their main channel, banklines, and so on. Groins are extensively used worldwide for shore protection from erosion, river navigation, beach reclamation among many other services. Improving the performance of groins is a crucial issue around the glove. Experimental investigations under clear water scour conditions have been conducted in this research to compare the performance of different groins in order to find out the suitable design of a groin. From the experimental runs, it is revealed that the groin models of different configurations behave in different ways. In the case of a solid I-shaped groin, a huge scour near the groin head and irregular bed pattern develop in the channel bed. While L-head and hockey-shaped groins improve the channel response a bit leading to decreased scour. Moreover, the hockey-shaped groin attracts the flow, and thus requires groin installation closely. The scour hole for a combined groin is relatively very small. As the scour endangers the stability of the groin structure, this turns out to be the most suitable one.


Richardson E.V., Stevens M.A., and Simons D.B., 1975. “The design of spurs for river training.” In XVIth, IAHR congress (pp. 382–388). Sao Paulo, Brazil.

Pandey M., Ahmad Z., and Sharma P.K., 2018. “Scour around impermeable spur dikes: A review.” ISH J. Hydraul. Eng., 24(1), 25–44. doi:10.1080/09715010.2017.1342571

Pandey M., Valyrakis M., Qi M., Sharma A. and Lodhi A.S., 2020b. “Experimental assessment and prediction of temporal scour depth around a spur dike.” Int. J. Sediment Res. doi:10.1016/j.ijsrc. 2020.03.015

Sarveram H., Shamsai A. and Banihashemi M.A., 2012. Two-dimensional simulation of flow pattern around a groyne using semi-implicit semi-Lagrangian method. International Journal of Physical Sciences. 7, 2775-2783.

J Kang H. Yeo S.K. and Ji U., 2011. Permeability effects of single groin on flow characteristics, Journal of Hydraulic Research. 49:6, 728-735.

Quanhong L. and Pengzhi L., 2007. Numerical Simulation of Recirculating Flow Near a Groyne, The 2nd International Conference on Marine Research and Transportation, Ischia, Naples, Italy. 61-68.

Mahmoud R. Eltoukhy and Neveen B.A., 2012. Effect of Groin Geometry on Scouring of Sandy River Beds Having 180o Bend, Civil Engineering Research Magazine, Al-Azhar University. 34(3): 880-892.

Fukuoka S, Nakagawa N., Sumi T. and Zhang H., 2013. Advances in River Sediment Research; Taylor & Francis Group: London, UK.

Alauddin M. and Tsujimoto T., 2012. Optimum configuration of groins for stabilization of alluvial rivers with fine sediment. International Journal of Sediment Research (Elsevier publishing), Vol. 27, No. 2, pp. 158–167.

Bahrami-Yarahmadi M, Pagliara S., Yabarehpour E. and Najafi N., 2020. Study of Scour and Flow Patterns around Triangular-Shaped Spur Dikes. KSCE J Civ Eng. 2020; 24(11), 3279–3288.

Ettema R., Muste M., 2004. Scale effects in flume experiments on flow around a spur dike in flatbed channel. Journal of Hydraulic Engineering 130(7):635-646, DOI: 10.1061/(ASCE)0733-9429(2004)130:7(635)

Duan J.G., 2009. Mean flow and turbulence around a laboratory spur dike. Journal of Hydraulic Engineering 135(10):803-811, DOI: 10.1061/(ASCE)HY.1943-7900.0000077

Jeon J., Lee J.Y., Kang S., 2018. Experimental investigation of three-dimensional flow structure and turbulent flow mechanisms around a non-submerged spur dike with a low length-to-depth ratio. Water Resources Research 54:3530-3556, DOI: 10.1029/2017WR021582

Koutrouveli T.I., Dimas A.A., Fourniotis N.Th., Demetracopoulos A.C., 2019. Groin spacing role on the effective control of wall shear stress in open-channel flow. Journal of Hydraulic Research 57(2):167- 182, DOI: 10.1080/00221686.2018.1478895

Safie and Tominaga, 2020. Effects of pile arrangement on the flow around a pile-group groin. JSCE. 8, 207-220.

Alauddin M., Tashiro T. and Tsujimoto T., 2011. Experimental investigation of channel responses against different configurations of groins, Advances in River Engineering, JSCE, vol.17, 335-340.

Uddin M.N. and Rahman M.M., 2012. Flow and erosion at a bend in the braided Jamuna River. International Journal of Sediment Research. 27(4), 498–509.




How to Cite

Mohammed, A., Pervin, R., & Hasan, M. Z. . (2022). Effect of Various Groins in a Series on Channel Bed Morphology: an Experimental Investigation. Stavební Obzor - Civil Engineering Journal, 31(1), 211–221. https://doi.org/10.14311/CEJ.2022.01.0016