Evaluation of ADCP Apparent Bed Load Velocity in a Large Sand-Bed River: Moving versus Stationary Boat Conditions
Publication: Journal of Hydraulic Engineering
Volume 137, Issue 9
Abstract
Detailed mapping of bathymetry and apparent bed load velocity using a boat-mounted acoustic Doppler current profiler (ADCP) was carried out along a 388-m section of the lower Missouri River near Columbia, Missouri. Sampling transects (moving boat) were completed at 5- and 20-m spacing along the study section. Stationary (fixed-boat) measurements were made by maintaining constant boat position over a target point where the position of the boat did not deviate more than 3 m in any direction. For each transect and stationary measurement, apparent bed load velocity () was estimated using ADCP bottom tracking data and high precision real-time kinematic (RTK) global positioning system (GPS). The principal objectives of this research are to (1) determine whether boat motion introduces a bias in apparent bed load velocity measurements; and (2) evaluate the reliability of ADCP bed velocity measurements for a range of sediment transport environments. Results indicate that both high transport () and moving-boat conditions (for both high and low transport environments) increase the relative variability in estimates of mean bed velocity. Despite this, the spatially dense single-transect measurements were capable of producing detailed bed velocity maps that correspond closely with the expected pattern of sediment transport over large dunes.
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Acknowledgments
The authors would like to thank the U.S. Geological Survey and Caroline Elliott, Chad Vishy, and Lindell Harmon at the Columbia Environmental Research Center in Columbia, Missouri, for their technical support and assistance during the data collection. The comments from USGS staff (David Mueller and Ryan Jackson) and three anonymous reviewers were very helpful in the improvement of the paper.
References
Dinehart, R. L., and Burau, J. R. (2005). “Averaged indicators of secondary flow in repeated acoustic Doppler current profiler crossings of bends.” Water Resour. Res., 41, W09405.
Elliott, C. M., Reuter, J. M., and Jacobson, R. B. (2009). “Channel morphodynamics in four reaches of the lower Missouri River, 2006-07.” U.S. Geological Survey Scientific Investigations Rep. 2009-5074, Reston, VA, 258, 〈http://pubs.usgs.gov/sir/2009/5074/〉.
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. 2005-1163, Reston, VA, 20, 〈http://www.cerc.usgs.gov/pubs/center/pdfDocs/〉.
Gaeuman, D., and Jacobson, R. B. (2006). “Acoustic bed velocity and bed load dynamics in a large sand bed river.” J. Geophys. Res., 111, F02005.
Gaeuman, D., and Jacobson, R. B. (2007a). “Field assessment of alternative bed-load transport equations.” J. Hydraul. Eng., 133(12), 1319–1328.
Gaeuman, D., and Jacobson, R. B. (2007b). “Quantifying fluid and bed dynamics for characterizing benthic physical habitat in large rivers.” J. Appl. Ichthyol., 23(4), 359–364.
Jamieson, E. C., Rennie, C. D., and Ramooz, R. (2008). “Validation of aDcp bedload transport measurements.” Proc. 2008 River Flow Conf., KUBABA Congress Dept. and Travel Services, Cesme, Turkey, 2343–2351.
Kostaschuk, R., Villard, P., and Best, J. (2004). “Measuring velocity and shear stress over dunes with acoustic Doppler profiler.” J. Hydraul. Eng., 130(9), 932–936.
McLean, S. R., Wolfe, S. R., and Nelson, J. M. (1999). “Predicting boundary shear stress and sediment transport over bedforms.” J. Hydraul. Eng., 125(7), 725–736.
Muste, M., Yu, K., and Spasojevic, M. (2004). “Practical aspects of ADCP data use for quantification of mean river characteristics, Part I: Moving-vessel measurements.” Flow Meas. Instrum., 15(1), 1–16.
Ramooz, R., and Rennie, C. D. (2010). “Laboratory measurement of bedload with an ADCP.” In Bedload-surrogate monitoring technologies: United States Geological Survey Scientific Investigations Rep. 2010-5091, Reston, VA, 〈http://pubs.usgs.gov/sir/2010/5091/papers/Ramooz.pdf〉.
RD Instruments, Inc. (RDI). (2009). Workhorse Rio Grande ADCP user’s guide, San Diego.
Rennie, C. D., and Millar, R. G. (2004). “Measurement of the spatial distribution of fluvial bedload transport velocity in both sand and gravel.” Earth Surf. Processes Landforms, 29(10), 1173–1193.
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 bed load measurement using an acoustic Doppler current profiler.” J. Geophys. Res., 109, F03003.
Rennie, C. D., Rainville, F., and Kashyap, S. (2007). “Improved estimation of ADCP apparent bed-load velocity using a real-time Kalman filter.” J. Hydraul. Eng., 133(12), 1337–1344.
Szupiany, R. N., Amsler, M. L., Best, J. L., and Parsons, D. R. (2007). “Comparison of fixed- and moving-vessel flow measurements with an aDcp in a large river.” J. Hydraul. Eng., 133(12), 1299–1307.
Teledyne RD Instruments (TRDI). (2009). WinRiver II User’s Guide, version 2.06, Poway, CA.
Villard, P. V., and Kostaschuk, R. A. (1998). “The relation between shear velocity and suspended sediment concentration over dunes: Fraser Estuary, Canada.” Mar. Geol., 148(1–2), 71–81.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 137 • Issue 9 • September 2011
Pages: 1064 - 1071
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Nov 2, 2009
Accepted: Dec 1, 2010
Published online: Aug 15, 2011
Published in print: Sep 1, 2011
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