Continuum Bed Model for Estuarine Sediments Based on Nonlinear Consolidation Theory
Publication: Journal of Hydraulic Engineering
Volume 125, Issue 3
Abstract
The goal of this note is to examine a continuum theory that describes the evolution of sediment beds when subjected to time-dependent shearing forces resulting from surface water movement. The bed was conceptualized as a medium with continuously varying properties such as shear strength and void ratio. The nonlinear equation describing finite strain consolidation, and the complicated nature of the shearing forces acting on top of the bed, preclude the possibility of analytical solutions. Ramifications of linearizing the governing flow equations were explicitly evaluated for applications in bed modeling. Numerical solutions were obtained for the linear and nonlinear models under transient boundary conditions. Model results indicated that the linear model typically predicts lower void ratios, and consequently underestimates the amounts of sediment eroded from the bed as compared to the nonlinear model.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Ariathurai, R. ( 1974). “A finite element model for sediment transport in estuaries,” PhD dissertation. University of California, Davis, Calif.
2.
Ariathurai, R., and Krone, R. B. (1976). “Finite element model for cohesive sediment transport.”J. Hydr. Div., ASCE, 102, 323–338.
3.
Cargill, K. W. ( 1982). “Consolidation of soft layers by finite strain analysis.” MPGL-82-3, U.S. Army Engineer Waterways Experiment Station, Vicksburg, Miss.
4.
Cargill, K. W. (1984). “Prediction of consolidation of very soft soil.”J. Geotech. Engrg., ASCE, 110(6), 775–795.
5.
Dyer, K. R. ( 1989). “Sediment processes in estuaries: future research requirements.” J. Geophys. Res., 94(C10), 14327–14339.
6.
Fox, P. J. (1997). “Solution charts for finite strain consolidation.”J. Geotech. Engrg., in press.
7.
Fox, P. J., and Berles, J. D. ( 1997). “CS2: A piecewise-linear model for large strain consolidation.” Int. J. for Numer. and Analytical Methods in Geomech., 7(21), 453–475.
8.
Gibson, R. E., England, G. L., and Hussey, M. J. L. ( 1967). “The theory of one-dimensional consolidation of saturated clays: I. Finite nonlinear consolidation of thin homogeneous layers.” Geotechnique, 17, 261–273.
9.
Gibson, R. E., Schiffman, R. L., and Cargill, K. W. ( 1981). “The theory of one-dimensional consolidation of saturated clays: II. Finite non-linear consolidation of thick homogeneous layers.” Can. Geotech. J., 18, 280–293.
10.
Hayter, E. J. ( 1983). “Prediction of cohesive sediment movement in estuarial waters,” PhD dissertation, University of Florida, Gainesville, Fla.
11.
Lee, K., and Sills, G. C. ( 1981). “The consolidation of a soil stratum, including self-weight effects and large strains.” Numer. and Analyt. Meth. in Geomech., 5, 105–124.
12.
Mehta, A. J. ( 1989). “On estuarine cohesive sediment suspension behavior.” J. Geophys. Res., 94(C10), 14303–14314.
13.
Owen, M. V. ( 1970). “A detailed study of the settling velocities of an estuarine mud.” Rep. INT 78, Hydr. Res. Station, Wallingford, U.K.
14.
Schiffman, R. L., Pane, V., and Sunara, V. ( 1985). “Sedimentation and consolidation.” Flocculation, Sedimentation and Consolidation, Proc., Engineering Foundation Conference, B. M. Mouudgil and P. Somasundaran, eds., Sea Island, Ga., 57–121.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 125 • Issue 3 • March 1999
Pages: 300 - 304
History
Published online: Mar 1, 1999
Published in print: Mar 1999
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.