Bridging Process Threshold for Sediment Infiltrating into a Coarse Substrate
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 136, Issue 2
Abstract
Sand infiltration into gravel frameworks poses significant engineering and ecological difficulties. Ten flume experiments were conducted to quantify a sand bridging threshold in a static gravel bed. The ratio was computed for each of 37 unique sand-substrate pairs and the data were plotted, with previously published flume data, to determine the threshold between bridging and unimpeded static percolation. The process threshold boundary between bridging and unimpeded static percolation fell in the range of , substantially higher than predicted by standard geotechnical filter criteria. Plotting the results against the critical constriction size of the substrates provided a more definitive process separation along the line .
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Acknowledgments
This work was funded through the U.S. Army Corps of Engineers’ System-Wide Water Resources Program (SWWRP). Bill Katzenmeyer and John Evans assisted with flume maintenance and experimental setup. The manuscript improved significantly as the result of the careful work Editor Labuz and of two anonymous reviewers.
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© 2010 ASCE.
History
Received: Aug 7, 2008
Accepted: Aug 5, 2009
Published online: Aug 15, 2009
Published in print: Feb 2010
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