Research Article
Aug 1971
Sampling Procedures for Coarse Fluvial Sediments
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VIEW THE REPLYPublication: Journal of the Hydraulics Division
Volume 97, Issue 8
Abstract
Procedures for sampling the bed material of gravel-bed rivers consist of five independent steps: selection of site and time, collection of a sample, determination of grain size, computation of size distribution, and presentation of results. Because several choices of methods are available at each step, much confusion exists in the literature. Simple geometric arguments, illustrated with a model based on densely packed cubes, are used to develop weighting factors to convert from one sampling procedure to another. Comparison with several sets of field data shows that the conversion method is applicable to gravel deposits. Differences remaining after conversion are attributable to random differences between samples, or to population differences. The grid-by-number procedure is the only surface-oriented procedure directly comparable (equivalent) to customary bulk sieve analysis. It is, therefore, the only correct sampling procedure for the study of surface-dependent phenomena. Additional field data are presented to compare three equivalent procedures.
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Published In
Journal of the Hydraulics Division
Volume 97 • Issue 8 • August 1971
Pages: 1165 - 1180
Copyright
© 1971 American Society of Civil Engineers.
History
Published in print: Aug 1971
Published online: Feb 3, 2021
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Authors
Affiliations
Rolf Kellerhals, AM.ASCE
Assoc. Prof. of Civ. Engrg.; Univ. of Alberta, Edmonton, Alberta, Canada; formerly, Hydr. Engr., Research Council of Alberta, Highway and River Engrg. Div., Edmonton, Alberta, Canada
Dale I. Bray, AM.ASCE
Asst. Prof. of Civ. Engrg.; Univ. of New Brunswick, Fredericton, N.B.; presently Grad. Student, Dept. of Civ. Engrg., Univ. of Alberta, Edmonton, Alberta
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