Comparison of Physical Transport Processes in Noncohesive River Sediments
Publication: Journal of Environmental Engineering
Volume 119, Issue 1
Abstract
In this paper, the sediment‐side abiotic mechanisms for contaminant transport across the sediment‐water interface of rivers are compared. The transport processes considered include molecular diffusion, colloidal diffusion, pore‐water advection between the stream and its associated aquifer, localized advection due to sediment surface roughness, and sediment movement. A simple model for contaminant transport by active bed‐load transport of noncohesive sediments in triangular dunes is developed and compared to both linearly sorbing and nonsorbing contaminant transport via passive pore‐water processes. The model is limited to homogeneous noncohesive sediment beds and specific flow conditions that lead to steady dune‐migration rates. The results suggest, however, that advection should normally be the dominant mechanism in stable sediments and for nonsorbing contaminants in unstable sediments near the threshold for sediment movement. Sorbing contaminant transport should normally be controlled by the rate of sediment movement.
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References
1.
Calandro, A. J. (1978). “Time of travel of solutes in Louisiana streams.” Rep., Louisiana Department of Transportation and Development, Office of Public Works, Baton Rouge, La.
2.
Crank, J. (1975). The mathematics of diffusion, 2nd Ed., Oxford Press, London, England.
3.
Dortch, M. S., Hales, L. Z., Letter, J. V., and McAnally, W. H. (1990). “Methods of determining the long‐term fate of dredged material for aquatic disposal sites.” Tech. Rep. D‐90‐1, U.S. Army Engineers Waterways Experiment Station, Vicksburg, Miss.
4.
Einstein, H. A. (1950). “The bed load function of sediment transportation in open channel flows.” Tech. Bulletin No. 1026, U.S. Department of Agriculture Soil Conservation Service, Washington, D.C.
5.
Engelund, F., and Fredsoe, J. (1982). “Sediment ripples and dunes.” Annual Review of Fluid Mech., 14, 13–27.
6.
Gschwend, P. M., Wu, S., Madsen, O. S., Wilkin, J. L., Ambrose, R. B., and McCutcheon, S. C. (1987). “Modeling the benthos‐water column exchange of hydrophobic chemicals.” U.S. Environmental Protection Agency, Athens, Ga.
7.
Guy, H. P., Simons, D. B., and Richardson, E. V. (1966). “Summary of alluvial channel data from flume experiments, 1956–61.” Rep., U.S. Geological Survey, Washington, D.C.
8.
Millington, R. J., and Quirk, J. P. (1961). “Permeability of porous solids.” Trans. Faraday Soc., 57, 1200.
9.
Raudkivi, A. J. (1967). Loose boundary hydraulics. Pergamon Press, London, England.
10.
Savant, S. A., Reible, D. D., and Thibodeaux, L. J. (1987). “Convective transport within stable river sediments.” Water Resour. Res., 23(9), 1763–1768.
11.
Simons, D. B., Richardson, E. V., and Nordin, C. F. (1964). “Sedimentary structures generated by flow in alluvial channels in primary structure and their hydrodynamic interpretation.” Spec. Publ. No. 12, American Association of Petroleum Geologists, Tulsa, Okla.
12.
Thibodeaux, L. J. (1979). Chemodynamics. John Wiley and Sons, New York, N.Y.
13.
Thibodeaux, L. J., and Boyle, J. O. (1987). “Bed‐form generated convective transport in bottom sediment.” Nature, 325, 341–343.
Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 119 • Issue 1 • January 1993
Pages: 90 - 102
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Jan 3, 1991
Published online: Jan 1, 1993
Published in print: Jan 1993
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