Mohsen Soltanpour, Farzin Samsami, Soroush Sorourian


A series of laboratory wave-flume experiments was conducted to investigate the dissipation of monochromatic regular waves on a horizontal muddy bed of commercial kaolinite. The rheological parameters of kaolinite samples with different water content ratios were obtained from controlled shear rate tests using the rheometer. The flow curves of shear stress versus shear rate were found to be essentially Bingham viscoplastic medium for steady unidirectional mud flows of the rheological tests. Assuming Bingham behavior for kaolinite, a wave-mud interaction model was employed to obtain the values of the wave attenuation coefficients. Comparisons between the measured and simulated results show a good agreement.


wave dissipation; rheological model; fluid mud; kaolinite; wave flume experiment; rheometry experiment

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Bingham, E. C., 1922. Fluidity and plasticity, McGraw-Hill, 440 pp.

Dalrymple, R. A., and Liu, P. L.-f., 1978. Waves over muds, a two-layer fluid model. Journal Physical Oceanography, 8: 1121-1131. http://dx.doi.org/10.1175/1520-0485(1978)008<1121:WOSMAT>2.0.CO;2

Gade, H. G., 1958. Effects of non rigid, impermeable bottom on plane surface wave in shallow water. Journal of Marine Research, 16(2): 61-82.

Iwasaki, T., Sato, M., 1972. Dissipation of wave energy due to opposing current. Proceeding of 13th Coastal Engineering Conference, ASCE, 1: 605-622.

Keulegan, G. H., 1950. Wave Motion, Engineering Hydraulics. Chapter 11, John Wiley and Sons Inc., New York.

Maa, P.-Y. and Mehta, A. J., 1990. Soft mud response to water waves. Journal of Waterway, Port, Coastal and Ocean Engineering, ASCE, 116(5): 634-650. http://dx.doi.org/10.1061/(ASCE)0733-950X(1990)116:5(634)

McLellan, T.N.; Pope, M.K., and Burke, C.E., 1990. Benefits of nearshore placement. Proceedings of third annual technical conference, Florida Shore and Beach Preservation Association, Tallahassee, FL, pp 339–353.

Soltanpour, M., 1998. Two Dimensional Modeling of Mud Profile Processes. Ph.D. dissertation, Dept. of Civil Eng., Yokohama National University, Yokohama.

Tsuruya, H., Nakano, S., and Takahama, J., 1986. Investigation of rheological properties of soft muds with a rotary viscometer, Technical Note of Port and Harbor Research Institute, Ministry of Transport, Japan, No. 566, 29 pp. (in Japanese).

Tsuruya, H., Nakano, S., and Takahama, J., 1987. Interaction between surface waves and a multilayered mud bed. Report of Port and Harbor Research Institute, Ministry of Transport, Japan, 26(5): 138-173.

DOI: http://dx.doi.org/10.9753/icce.v32.waves.4