Sauter mean diameter determination for the fine fraction of suspended sediments using a LISST-25X diffractometer

► Evaluation of the LISST-25X ability for measuring the size of fine sediments. ► Algorithm to determine the Sauter mean diameter for the fine fraction. ► Algorithm based on the traditional output variables from the LISST-25X. ► Good correlation between algorithm results and measurements made on fin...

Full description

Saved in:
Bibliographic Details
Published in:Measurement : journal of the International Measurement Confederation 2012-04, Vol.45 (3), p.364-368
Main Authors: Filippa, Leonardo, Trento, Alfredo, Álvarez, Ana M.
Format: Article
Language:English
Subjects:
Algorithms
Correlation
Diffractometers
Fine fraction
Granulometric composition
LISST-25X
Mathematical analysis
Rivers
Sauter mean diameter
Sediments
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:► Evaluation of the LISST-25X ability for measuring the size of fine sediments. ► Algorithm to determine the Sauter mean diameter for the fine fraction. ► Algorithm based on the traditional output variables from the LISST-25X. ► Good correlation between algorithm results and measurements made on fine sediments. ► Algorithm limitations attributed to operational conditions in the laboratory. The LISST-25X ability for measuring the Sauter mean diameter of the fine fraction of sediment samples, SMDf, is evaluated. A simple algorithm to determine the SMDf is proposed. The algorithm is based on the standard output variables from the LISST-25X diffractometer: Sauter mean diameter of the complete sample, SMDt; Sauter mean diameter of the coarse fraction, SMDg; total suspended sediment concentration, SSCt, and coarse suspended sediment concentration, SSCg. Validation is performed in the laboratory by contrasting algorithm results from complete sediment samples against LISST SMDt measurements made on the fine fraction of the samples. A second validation is performed by comparison between algorithm results and Malvern measurements on the same samples. The samples are from the Salado River (Argentina) and the Paraná River (Argentina). Their SMDt range from 10μm to 70μm. Results indicate that the algorithm determines the Sauter mean diameter of the fine fraction in a reliable way, with average differences of 1.4μm (algorithm-LISST comparison) and 3.4μm (algorithm-Malvern comparison). The observed differences are attributed to operational conditions rather than to algorithm limitations. A correlation between calculated SMDf and d50 of the fine fraction is also established, with a determination coefficient of R2=0.46.
ISSN:0263-2241
1873-412X
DOI:10.1016/j.measurement.2011.11.009