Articles | Volume 7, issue 3
Research article
02 Sep 2019
Research article |  | 02 Sep 2019

Percentile-based grain size distribution analysis tools (GSDtools) – estimating confidence limits and hypothesis tests for comparing two samples

Brett C. Eaton, R. Dan Moore, and Lucy G. MacKenzie

Data sets

Data sets and model code used for Eaton, Moore and MacKenzie B. C. Eaton, R. D. Moore, and L. G. MacKenzie

Model code and software

GSDtools: analyse and compare river bed surface grain size distributions (R Package) B. C. Eaton and R. D. Moore

Short summary
Researchers studying gravel bed rivers almost always require a sample of the bed surface grain size range. These samples are typically expressed as cumulative frequency distributions. We present statistical techniques for generating and plotting confidence intervals for the various size percentiles and for determining whether size percentiles from two samples are statistically different. The techniques are implemented in an R package; a simplified version is implemented in a spreadsheet.