An Experimental Study of Shear Stress Distribution in a Compound Meandering Channel
American Journal of Civil Engineering
Volume 1, Issue 1, July 2013, Pages: 1-5
Received: May 20, 2013;
Published: Jun. 10, 2013
Views 3476 Downloads 252
Abdullah Al Amin, Bangladesh Water Development Board, Dhaka, Bangladesh
S. M. Khan, Dept. of Water Resources Engineering, BUET, Dhaka, Bangladesh
Ashraf-ul-Islam , RDRS, Dhaka, Bangladesh
Naturally river flow can be characterized as compound meandering channel in which the shear stress characteristics are quite intricate. Reliable investigation of shear stress distribution in a compound meandering channel is essential in solving a variety of river hydraulics and engineering problems, designing stable channels and bank protection, understanding the mechanism of sediment transport. A laboratory experiment has been conducted in a compound meandering channel with symmetric cross-sections having floodplain width ratio of 1, 1.67, 2.33, 3 and depth ratio of 0.20, 0.30, 0.35, 0.40 using the large-scale open air facility in the Department of Water Resources Engineering, Bangladesh University of Engineering and Technology (BUET), Dhaka, Bangladesh. Point velocity data have been collected using an ADV (Acoustic Doppler Velocity Meter) for different depth and width ratio at different locations of a compound meandering channel. Shear stress is calculated from the Prandtl-Von Karman Universal Velocity Distribution Law. The laboratory experimental investigation reveals that shear stress increases with the increase of depth and width ratio and low magnitude of boundary shear is observed in the outer bend as compare to the inner bend in a compound meandering channel.
Abdullah Al Amin,
S. M. Khan,
An Experimental Study of Shear Stress Distribution in a Compound Meandering Channel, American Journal of Civil Engineering.
Vol. 1, No. 1,
2013, pp. 1-5.
Khatua, K.K., Patra, K.C., and Jha, R. (2009). "Apparent Shear Stress In A Compound Channel"HYDRO-2009, CWPRS.
Ghosh, S. and Jena, S.B. (1971). "Boundary Shear Stress Distribution in Open Channel Compound." Proc. of Institute Civil Engineers, 49,417-430.
Ghosh, S.N., and Kar, S.K. (1975). "River Flood Plain Interaction and Distribution of Boundary Shear in a Meander Channel with Flood Plain." Proceedings of the Institution of Civil Engineers, London, 59(2), 805-811.
Knight, D. W. (1981). "Boundary Shear in Smooth and Rough Channels." Journal of Hydraulic Engineering, ASCE, 107(7), 839-851.
Myers, W. R. C., and Elsawy, E. M. (1975). "Boundary Shear in Channel with Floodplain." Journal of Hydraulic Engineering, ASCE, 101(7), 933-946.
Knight, D. W., and Hamed, M. E. (1984). "Boundary Shear in Symmetrical Compound Channels." Journal of Hydraulic Engineering, ASCE, 110(10), 1412-1430.
Khatua, K. K., Patra, K. C., Sahoo, N. and Nayak, P. P. (2010). "Evaluation of Boundary Shear in a Meandering Channel." Proceedings of Ninth ICHE, IIT Madras,Chennai,India.
Fares, Y. (1995). "Boundary Shear in Curved Channel with Side Overflow." Journal of Hydraulic Engineering, ASCE, 121(1), 2–14.
Wright & Carstens (1970)."Linear momentum flux to over bank sections", Journal of Hydr. Division. ASCE, Vol.96, NoHY9, pp.1781-1793.
Rhodes, D.G., Lamb, E.J., Chance, R.J., and Jones, B.S. (1991). "Automatic measurement of boundary shear stress and velocity distributions in duct flow". J. Hydr. Research, IAHR, 29(2): 189-197.
Rhodes, D.G., and Knight, D.W. (1994). "Distribution of shear force on the boundary of a smooth rectangular duct". J. Hydr. Engrg., ASCE,120(7): 787-807.
Patra, K. C., & Kar, S.K.,(2000) "Flow interaction of Meandering River with Flood plains "Journal of Hydr. Engineering, ASCE, Vol., 126, No.8, pp.593-603.
Khatua, K. K., Patra, K. C. (2007). "Boundary shear stress distribution in meandering compound channel flow" Proceedings of the 5th Australian Stream Management Conference, Albury,NSW, Australia.