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Proceedings of the 7th International Conference on HydroScience and Engineering (ICHE 2006) [ISBN: 0977447405] >
A particle tracking technique for bedload motion
Please use this identifier to cite or link to this item:
http://hdl.handle.net/1860/1435
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| Title: | A particle tracking technique for bedload motion |
| Authors: | Papanicolaou, Athanasios N.
Knapp, Doug |
| Keywords: | Sediment transport
Fluvial hydraulics
Experimental hydraulics |
| Issue Date: | 13-Sep-2006 |
| Publisher: | Michael Piasecki and College of Engineering, Drexel University |
| Citation: | Proceedings of the Seventh International Conference on Hydroscience and Engineering, Philadelphia, PA, September 2006. http://hdl.handle.net/1860/732 |
| Abstract: | Nowadays, the advances made in scientific visualization techniques have enhanced our capabilities
of tracking sediment and measuring sediment rates. The focus of this study is to provide a new
experimental approach to determine the displacement speed of particles rolling atop a well packed
layer of spheres and provide a formula that describes the average displacement speed of particles as
a function of the particles geometry and weight, settling velocity, and the frictional characteristics of
flow. For this purpose, this study presents the measurements of the displacement speeds of three
different sized spherical particles under varying flow conditions and bed roughness. The particles,
ranging in size from 5/8 of an inch to one inch in diameter, primarily experienced motion due to
rolling. The displacement speed information is required for the prediction of sediment fluxes, which
can be used to model local sediment entrainment in natural gravel streams. For this purpose, a
laboratory flume was used to perform 30 experimental runs. The tests were repeated 15 times, or
until repeatability was established. Velocity profiles, shear stress, discharge, and bulk velocity were
acquired for each run. An ADV and Swoffer were used to obtain the velocity profiles. Sediment
motion was monitored using a plan view from a digital camera mounted above the flume.
Individual frames depicting a particle’s motion were produced using Asymetrix DVP and Adobe
Photoshop 4.0. Data translation software combined the individual frames to calculate the
displacement speed of sediment motion. The results are compared with values predicted by bed
load formulas developed by Sekine and Lee. Values observed in this experiment are greater than
the values predicted by Sekine and less than the values predicted by Lee. |
| Description: | Paper presented at The Seventh International Conference on HydroScience and Engineering (ICHE) hosted by the College of Engineering at Drexel Univeristy on September 10-13, 2006 in Philadelphia, Pennsylvania. The conference theme was IT in the Field of HydroSciences. It included several mini-symposia that emphasized IT topics in HydroSciences and the yearly meeting of the metadata group of the International Oceanographic Data and Information Exchange organization. |
| URI: | http://hdl.handle.net/1860/1435 |
| ISBN: | 0977447405 |
| Appears in Collections: | Proceedings of the 7th International Conference on HydroScience and Engineering (ICHE 2006) [ISBN: 0977447405]
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