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(Article of periodic en Anglais - 2014)

Document title

Roughness determination of coarse grained alpine river bed surfaces using Terrestrial Laser Scanning data

published at : Climatic signals in geomorphological systems

Authors(s) and Affiliation(s)

BAEWERT H. ; BIMBÖSE M. ; BRYCK A. ; RASCHER E. ; SCHMIDT K.-H. ; MORCHE D. ;

Abstract

The goal of this research is to improve upon the methods for roughness length determination in gravel-bed rivers using terrestrial laser scanning (TLS). To this end, 2 principle methodological considerations were examined. 1.) The influence of the number of scan positions on roughness calculation. 2.) The influence of grid-cell size on roughness calculation during post-processing. Scan data were furthermore compared to sediment samples to relate TLS-data to conventional roughness calculation methods. Several test sites in the Reintal valley, Bavaria, Germany were scanned from multiple orientations. The results from these experiments show that despite minor particle shading, roughness length determination does not depend significantly on the number of scan orientations used. However, results clearly show that roughness length determination depends highly on the choice of grid cell size during post processing. This study supports the use of TLS as the most appropriate and versatile method for roughness analysis in dry gravel bed river reaches

Source

Thematical fascicle

published at : Zeitschrift für Geomorphologie / ISSN 0372-8854 / CODEN ZGMPAG

Editor : Gebruder Borntraeger, Stuttgart - ALLEMAGNE (1925)

Millesime : 2014, vol. 58, no 1 [pp. 81-95]

Bibliographic references : 38 ref.

Collation : fig., tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 8829

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1127/0372-8854/2013/S-00127

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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