<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>Eighteen samples of Quaternary unconsolidated sediments from the Piotrków Plateau and the Radomsko Hills in central Poland have been analysed for their average grain size, sorting, skewness and kurtosis. The analysis was carried out by seven computational methods of interpolation and nine extrapolation methods. It appears that linear interpolation, the traditional method (DOS), and the Josek and Gradistat Programs give comparable results, but that quadratic interpolation and the method of moments should not be applied since they yield unreliable results. The method of moments gives unduly high or unduly low parameter values because of the application of different, i.e. incomparable measures in the applied formulae. It should be stressed that only extrapolation provides, if performed under the right conditions, the possibility to determine some parameters, in particular skewness values.</p></abstract>

Eighteen samples of Quaternary unconsolidated sediments from the Piotrków Plateau and the Radomsko Hills in central Poland have been analysed for their average grain size, sorting, skewness and kurtosis. The analysis was carried out by seven computational methods of interpolation and nine extrapolation methods. It appears that linear interpolation, the traditional method (DOS), and the Josek and Gradistat Programs give comparable results, but that quadratic interpolation and the method of moments should not be applied since they yield unreliable results. The method of moments gives unduly high or unduly low parameter values because of the application of different, i.e. incomparable measures in the applied formulae. It should be stressed that only extrapolation provides, if performed under the right conditions, the possibility to determine some parameters, in particular skewness values.

Grain-size distribution analysis of Quaternary sediments from the southern part of the Lodz region in Poland: a computational-methods approach

Chair of Quaternary Research, Faculty of Geography, University of Lodz, Kopcińskiego 31, 90-142 Lódź, Poland

Dalkia Łódź, Andrzejewskiej 5, 90-975 Łódź, Poland

Geologos

Eighteen samples of Quaternary unconsolidated sediments from the Piotrków Plateau and the Radomsko Hills in central Poland have been analysed for their average...

Grain-size distribution analysis of Quaternary sediments from the southern part of the Lodz region in Poland: a computational-methods approach

Pubblicato online: 02 gen 2012

Pagine: 205 - 219

DOI: https://doi.org/10.2478/v10118-011-0012-7

Parole chiave
granulometric analysis, skewness, kurtosis, computational methods, Quaternary sediments, central Poland

This content is open access.

Grain-size distribution analysis of Quaternary sediments from the southern part of the Lodz region in Poland: a computational-methods approach

Pubblicato online: 02 gen 2012

Pagine: 205 - 219

DOI: https://doi.org/10.2478/v10118-011-0012-7

Parole chiavegranulometric analysis, skewness, kurtosis, computational methods, Quaternary sediments, central Poland

This content is open access.

Parole chiave
granulometric analysis, skewness, kurtosis, computational methods, Quaternary sediments, central Poland