• Yoon, Byung-man (Professor, Dept. of Civil and Env. Engr. Myong Ji Univ.) ;
  • Yu, Kwon-kyu (Research Assistant, IIHR, Univ. of Iowa, Iowa City, U.S.A.) ;
  • Marian Muste (Assistant Research Engineer, IIHR, Univ. of Iowa, Iowa City, U.S.A.)
  • Published : 2002.04.01


This study investigates the effects of sediment on the flow characteristics such as velocity distribution, friction velocity, turbulent intensities, Reynolds stress, etc. Particle tracking velocimetry (PTY) is used to measure the vertical flow field. Results show that flow over the high bed-load concentration region has larger values of mean velocity and friction velocity and smaller values of turbulence intensities, compared to those for flow over the low bed-load concentration region.



  1. Bennett, S.J. and Bridge, J.S. (1995). 'The geometry and dynamics of low-relief bedforms in heterogeneous sediment in a laboratory channel, and their relationship to water flow and sediment transport.' J. Sediment. Res., A65, 29-39
  2. Kulick, J.D., Fessler, J.R., and Eaton, J.K. (1994). 'Particle response and turbulence modification in fully developed channel flow.' J. Fluid Mech., 277, 109-134
  3. Muste, M., Fujita, I., and Kruger, A. (1998). 'Experimental comparison of two laser-based velocimeters for flows with alluviaslsand.' Experiments in Fluids, Vol. 24, pp. 273-284
  4. Muste, M. and Patel, V.C. (1992). 'Velocity profiles for particles and liquid in open-channel flow with suspended sediment.' J. Hydraul. Eng., 118, 971-988
  5. Nakagawa, H., Nezu, I., and Ueda, H. (1975). 'Turbulence of open channel flow over smooth and rough beds.' Proc. of Japan Soc. of Civil Engrs., 241, pp. 155-168
  6. Nezu, I. and Nakagawa, H. (1993). Turbulence in open-channel flows, Int. Ass. Hydraul. Res. Monograph Series, A.A. Balkema, Rotterdam, 281 pp
  7. Umeyama M and Gerritsen F. (1992). 'Velocity distribution in uniform sediment-laden flow.' J.Hydraul.Eng., 118, 229-245
  8. Vanoni, V.A. (1953). 'Some effects of suspended sediment on flow characteristics.' Proc. of 5th Hydraul. Conf., Bulletin 34, State Univ. of Iowa, Studies in Eng.