Field Assessment of Alternative Bed-Load Transport Estimators
Publication: Journal of Hydraulic Engineering
Volume 133, Issue 12
Abstract
Measurement of near-bed sediment velocities with acoustic Doppler current profilers (ADCPs) is an emerging approach for quantifying bed-load sediment fluxes in rivers. Previous investigations of the technique have relied on conventional physical bed-load sampling to provide reference transport information with which to validate the ADCP measurements. However, physical samples are subject to substantial errors, especially under field conditions in which surrogate methods are most needed. Comparisons between ADCP bed velocity measurements with bed-load transport rates estimated from bed-form migration rates in the lower Missouri River show a strong correlation between the two surrogate measures over a wide range of mild to moderately intense sediment transporting conditions. The correlation between the ADCP measurements and physical bed-load samples is comparatively poor, suggesting that physical bed-load sampling is ineffective for ground-truthing alternative techniques in large sand-bed rivers. Bed velocities measured in this study became more variable with increasing bed-form wavelength at higher shear stresses. Under these conditions, bed-form dimensions greatly exceed the region of the bed ensonified by the ADCP, and the magnitude of the acoustic measurements depends on instrument location with respect to bed-form crests and troughs. Alternative algorithms for estimating bed-load transport from paired longitudinal profiles of bed topography were evaluated. An algorithm based on the routing of local erosion and deposition volumes that eliminates the need to identify individual bed forms was found to give results similar to those of more conventional dune-tracking methods. This method is particularly useful in cases where complex bed-form morphology makes delineation of individual bed forms difficult.
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References
Bunte, K., Abt, S. R., Potyondy, J. P., and Ryan, S. E. (2004). “Measurement of coarse gravel and cobble transport using portable bedload traps.” J. Hydraul. Eng., 130(9), 879–893.
Childers, D. (1999). “Field comparisons of six pressure-difference bedload samplers in high-energy flow.” U.S. Geological Survey, Water Resources Investigations Rep. No. 92-4068.
Edwards, T. E., and Glysson, G. D. (1999). “Field methods for measurement of fluvial sediment.” U.S. Geological Survey, Techniques of Water Resources Investigations 3-C2.
Gaeuman, D., and Jacobson, R. B. (2005). “Aquatic habitat mapping with an acoustic Doppler current profiler: Considerations for data quality.” U.S. Geological Survey, Open File Rep. No. 2005-1163.
Gaeuman, D., and Jacobson, R. B. (2006). “Acoustic bed velocity and bedload dynamics in a large sand-bed river.” J. Geophys. Res., 111, F02005.
Gaeuman, D., and Rennie, C. D. (2006). “A comparison of two field investigations into acoustic bed velocity: General responses and instrument frequency effects.” Proc., 8th Federal Interagency Sedimentation Conf., Reno, Nev.
Gaweesh, M. T. K., and van Rijn, L. C. (1994). “Bedload sampling in sand-bed rivers.” J. Hydraul. Eng., 120(12), 1364–1384.
Gray, J. R., Webb, R. H., and Hyndmann, D. W. (1991). “Low-flow sediment transport in the Colorado River.” Proc., 5th Federal Interagency Sedimentation Conf., S.-S. Fan and Y.-H. Kuo, eds., U.S. Subcommittee on Sedimentation, 4, 63–71.
Inman, D. L., and Jenkins, S. A. (1999). “Climate change and the episodicity of sediment flux of small California rivers.” J. Geol., 107, 251–270.
Jerolmack, D., and Mohrig, D. (2005). “Interactions between bed forms: Topography, turbulence, and transport.” J. Geophys. Res., 110, F02014.
Karim, F. (1995). “Bed configuration and hydraulic resistance in alluvial-channel flows.” J. Hydraul. Eng., 121(1), 15–25.
Keown, M. P., Dardeau, Jr., E. A., and Causey, E. M. (1986). “Historic trends in the sediment flow regime of the Mississippi River.” Water Resour. Res., 22(11), 1555–1564.
Kleinhans, M. G., and Ten Brinke, W. B. M. (2001). “Accuracy of cross-channel sampled sediment transport in large sand-gravel-bed rivers.” J. Hydraul. Eng., 127(4), 258–269.
Kostaschuk, R., and Best, J. (2005). “Response of sand dunes to variations in tidal flow: Fraser Estuary, Canada.” J. Geophys. Res., 110, F04S04.
Kostaschuk, R. A., Church, M. A., and Luternauer, J. L. (1989). “Bed-material, bedforms and bed load in a salt-wedge estuary—Fraser River, British Columbia.” Can. J. Earth Sci., 26, 1440–1452.
Kostaschuk, R., and Villard, P. (1996). “Flow and sediment transport over large subaqueous dunes: Fraser River, Canada.” Sedimentology, 43, 849–863.
Laronne, J. B., Alexandrov, J., Bergman, N., Cohen, H., Garcia, C., Habersack, H., Powell, D. M., and Reid, I. (2003). “The continuous monitoring of bedload flux in various fluvial environments.” Erosion and sediment transport measurement in rivers: Technological and methodological advances, J. Bogen, T. Fergus, and D. E. Walling, eds., International Association of Hydrological Sciences, Publication 283, Wallingford, U.K., 134–145.
Leopold, L. B., and Emmett, W. W. (1976). “Bedload measurements, East Fork River, Wyoming.” Proc. Natl. Acad. Sci. U.S.A., 73(4), 1000–1004.
Mohrig, D., and Smith, J. D. (1996). “Predicting the migration of dunes.” Water Resour. Res., 32(10), 3207–3217.
Pitlick, J. (1988). “Variability of bed load measurement.” Water Resour. Res., 24(1), 173–177.
Rennie, C. D., Millar, R. G., and Church, M. A. (2002). “Measurement of bed load velocity using an acoustic Doppler current profiler.” J. Hydraul. Eng., 128(5), 473–483.
Rennie, C. D., and Villard, P. V. (2004). “Site specificity of bedload measurement using an acoustic Doppler current profiler.” J. Geophys. Res., 109, F03003.
Simons, D. B., Richardson, E. V., and Nordin, C. F., Jr. (1965). “Bedload equations for ripples and dunes.” U.S. Geol. Surv. Prof. Pap., 462-H.
Ten Brinke, W. B. M., Wilbers, A. W. E., and Wesseling, C. (1999). “Dune growth, decay and migration rates during a large-magnitude flood at a sand and mixed sand-gravel bed in the Dutch Rhine River system.” Fluvial sedimentology VI, N. D. Smith and J. Rogers, eds., Blackwell Science, Oxford, U.K., 15–32.
Van Rijn, L. C. (1984a). “Sediment transport. I: Bed load transport.” J. Hydraul. Eng., 110(10), 1431–1456.
Van Rijn, L. C. (1984b). “Sediment transport. III: Bed forms and alluvial roughness.” J. Hydraul. Eng., 110(12), 1733–1754.
Venditti, G., Church, M., and Bennett, S. J. (2005). “Morphodynamics of small-scale superimposed sand waves over migrating dune bed forms.” Water Resour. Res., 41, W10423.
Villard, P. V., and Church, M. (2003). “Dunes and associated sand transport in a tidally influenced sand-bed channel: Fraser River, British Columbia.” Can. J. Earth Sci., 40, 115–130.
Wewetzer, S. F. K., and Duck, R. W. (1999). “Bedforms in the middle reaches of the Tay Estuary, Scotland.” Fluvial sedimentology VI, N. D. Smith and J. Rogers, eds., Blackwell Science, Oxford, U.K., 33–41.
Wilcock, P. R. (1998). “Two-fraction model of initial sediment motion in gravel-bed rivers.” Science, 280, 410–412.
Yalin, M. S., and Karahan, E. (1979). “Steepness of sedimentary dunes.” J. Hydr. Div., 105(4), 381–392.
Yang, C.-S. (1986). “On Bagnold’s sediment transport equation in tidal marine environments and the practical definition of bedload.” Sedimentology, 33, 465–486.
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© 2007 ASCE.
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Received: Apr 5, 2006
Accepted: Jun 15, 2007
Published online: Dec 1, 2007
Published in print: Dec 2007
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