Lateral Variations in Suspended Sediment Concentration over Dunes
Publication: Journal of Hydraulic Engineering
Volume 132, Issue 12
Abstract
A series of laboratory flume experiments were conducted to characterize lateral variations of suspended sediment over dunes. Forty experimental runs were made using flow depths of 0.328 and in a -wide channel. The Froude number was 0.47 and the median diameter of the bed material was . Point samples of suspended sediment and depth-integrated values calculated using acoustic backscatter data were collected simultaneously at two lateral positions at spacings of 0.41, 0.20, 0.10, and . Root mean square differences between the paired samples increased from 30 to 94% and from 20 to 45% of the mean concentration for point samples and depth-integrated samples, respectively, as the lateral spacing between samples was increased. Lateral variations in the concentration of suspended sediment should be considered when designing sediment sampling strategies over dune beds.
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Acknowledgments
The experiments could not have been conducted without the assistance of John Cox. Jason Cabell, Charles Hardin Jr., and Kim Dodez who helped collect and analyze suspended sediment samples. Doug Shields, Jim Chambers, and Brian Barkdoll provided reviews which improved the quality of this paper.
References
Abraham, D. D., and Pratt, T. (2002). “Quantification of bed-load transport on the Upper Mississippi River using multibeam survey data and traditional methods.” ERDC/CHL CHETN-VII-4, U.S. Army Engineer Research and Development Center, Vicksburg, Miss.
Carey, W. P. (1985). “Variability in measured bedload-transport rates.” Water Resour. Bull., 21(1), 39–48.
Cheng, H., and Hay, A. E. (1993). “Broadband measurements of the acoustic backscatter cross section of sand particles in suspension.” J. Acoust. Soc. Am., 94(4), 2247–2254.
Crawford, A. M., and Hay, A. E. (1993). “Determining suspended sand size and concentration from multifrequency acoustic backscatter.” J. Acoust. Soc. Am., 94(6), 3312–3324.
Davis, B. E. (2005). “A guide to the proper selection and use of federally approved sediment and water-quality samplers.” Rep. No. QQ, Federal Interagency Sedimentation Project, Waterways Experiment Station, Vicksburg, Miss.
Edwards, T. K., and Glysson, G. D. (1999). “Field methods for measurement of fluvial sediment.” U.S. Geological Survey techniques of water resources investigations, Book 3, Chap. 2, Reston, Va.
Gomez, B., Hubbell, D. W., and Stevens, H. H., Jr. (1990). “At-a-point bed load sampling in the presence of dunes.” Water Resour. Res., 26(11), 2717–2731.
Gomez, B., Naff, R. L., and Hubbell, D. W. (1989). “Temporal variations in bedload transport rates associated with the migration of bedforms.” Earth Surf. Processes Landforms, 14, 135–156.
Guy, H. P., Simons, D. B., and Richardson, E. V. (1966). “Summary of alluvial channel data from flume experiments, 1956-61.” U.S. Geological Survey Professional Paper 462-1, Reston, Va.
Harms, J. C., Southard, J. B., and Walker, R. G. (1982). Structures and sequences in clastic rocks, Society of Economic Paleontologists and Mineralogists, Tulsa, Okla.
Hay, A. E., and Sheng, J. (1992). “Vertical profiles of suspended sand concentration and size from multifrequency acoustic backscatter.” J. Geophys. Res., [Oceans], 97(10), 15661–15677.
Hubbell, D. W., Stevens, H. H., Jr., Skinner, J. V., and Beverage, J. P. (1981). “Recent refinements in calibrating bedload samplers.” Proc., Water Forum 1981, Vol. 1, ASCE, Reston, Va. 128–141.
Hubbell, D. W., Stevens, H. H., Jr., Skinner, J. V., and Beverage, J. P. (1987). “Laboratory data on coarse sediment transport for bedload-sampler calibrations.” U.S. Geological Survey Water Supply Paper 2299, Reston, Va.
Iseya, F. (1984). “An experimental study of dune development and its effect on sediment suspension.” Environmental research papers, no. 5, Environmental Research Center, University of Tsukuba, Ibaraki, Japan.
Kuhnle, R. A., and Wren, D. G. (2005). “Breakout session I, suspended sediment measurement: Data needs, uncertainty, and new technologies.” Proc., Federal Interagency Sediment Monitoring Instrument and Analysis Research Workshop, J. R. Gray, ed., Flagstaff, Ariz., U.S. Geological Survey Circular 1276, Reston, Va., 8–15.
Nelson, M. E., and Benedict, P. C. (1950). “Measurement and analysis of suspended-sediment loads in streams.” Trans. Am. Soc. Civ. Eng., 116, 891–918.
Simons, D. B., Richardson, E. V., and Haushild, W. L. (1963). “Some effects of fine sediment on flow phenomena.” U.S. Geological Survey Water-Supply Paper No. 1498-G, Reston, Va.
Snedecor, G. W., and Cochran, W. G. (1980). Staistical methods, 7th Ed., Iowa State University Press, Ames, Iowa.
St. Paul U.S. Engineer District Sub-Office Hydraulic Laboratory. (1941). “Laboratory investigation of suspended sediment samplers.” Rep. No. 5, Univ. of Iowa, Iowa City, Iowa.
Systat Software, Inc. (2004). SigmaStat 3.1 user’s manual, Point Richmond, Calif.
Thorne, P. D., Hardcastle, P. J., Flatt, D., and Humphery, J. D. (1994). “On the use of acoustics for measuring shallow water suspended sediment processes.” IEEE J. Ocean. Eng., 19(1), 48–57.
Thorne, P. D., Hardcastle, P. J., and Soulsby, R. L. (1993). “Analysis of acoustic measurements of suspended sediments.” J. Geophys. Res., [Oceans], 98(1), 899–910.
Thorne, P. D., Vincent, C. E., Hardcastle, P. J., Rehman, S., and Pearson, N. (1991). “Measuring suspended sediment concentrations using acoustic backscatter devices.” Mar. Geol., 98, 7–16.
Thorne, P. D., Waters, K. R., and Brudner, T. J. (1995). “Acoustic measurements of scattering by objects of irregular shape.” J. Acoust. Soc. Am., 97(1), 242–251.
Urick, R. J. (1983). Principles of underwater sound, 3rd Ed., Peninsula Publishing, Los Altos, Calif.
Van Rijn, L. C. (1993). Principles of sediment transport in rivers, estuaries and coastal seas, Aqua, Emmeloord, The Netherlands.
Wren, D. G., Barkdoll, B. D., Kuhnle, R. A., and Derrow, R. W., II. (2000a). “Field techniques for suspended-sediment measurement.” J. Hydraul. Eng., 126(2), 97–104.
Wren, D. G., Bennett, S. J., Barkdoll, B. D., and Kuhnle, R. A. (2000b). “The effect of spatial and temporal separation on suspended-sediment concentration measurements.” Proc., Int. Conf. on Hydroinformatics, International Association of Hydraulic Research, Iowa City, Iowa.
Wren, D. G., Bennett, S. J., Barkdoll, B. D., and Kuhnle, R. A. (2005). “Variability in suspended-sediment concentration over mobile sand beds.” J. Hydraul. Eng., 131(8), 733–736.
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Information
Published In
Journal of Hydraulic Engineering
Volume 132 • Issue 12 • December 2006
Pages: 1341 - 1346
Copyright
© 2006 ASCE.
History
Received: Aug 31, 2004
Accepted: May 16, 2006
Published online: Dec 1, 2006
Published in print: Dec 2006
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