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(Article of periodic en Anglais - 2012)

Document title

Through-water terrestrial laser scanning of gravel beds at the patch scale

Authors(s) and Affiliation(s)

SMITH M. (1) ; VERICAT D. (2 3 1) ; GIBBINS C. (4) ;
(1) Inst. of Geography and Earth Sciences, Univ. of Wales, Aberystwyth, ROYAUME-UNI
(2) Fluvial Dynamics Research group (RIUS). Dep. of Environment and Soil Sciences, Univ., Lleida, ESPAGNE
(3) Forestry and Technology Centre of Catalonia, Solsona, ESPAGNE
(4) Northern Rivers Inst., School of Geosciences, Univ., Aberdeen, ROYAUME-UNI

Abstract

This paper presents patch-scale laboratory and field experiments to demonstrate that through-water terrestrial laser scanning (TLS) has the potential to provide high resolution digital elevation models of submerged gravel beds with enough detail to depict individual grains and small-scale forms. The resulting point cloud data requires correction for refraction before registration. Preliminary validation shows that patch-scale TLS through 200mm of water introduces a mean error of less than 5mm under ideal conditions. Point precision is not adversely affected by the water column. The resulting DEMs can be embedded seamlessly within larger sub-aerial reach-scale surveys and can be acquired alongside flow measurements to examine the effects of three-dimensional surface geometry on turbulent flow fields and their interaction with instream ecology dynamics

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2012, vol. 37, no4 [pp. 411-421]

Bibliographic references : 50 ref.

Collation : 10 fig., 5 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2254

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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