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(Article of periodic en Anglais - 2014)

Document title

Hyperscale terrain modelling of braided rivers : fusing mobile terrestrial laser scanning and optical bathymetric mapping

Authors(s) and Affiliation(s)

WILLIAMS R.D. (1) ; BRASINGTON J. (2) ; VERICAT D. (1 3) ; HICKS D.M. (4) ;
(1) Inst. of Geography and Earth Sciences, Aberystwyth Univ. of Wales, Ceredigion, ROYAUME-UNI
(2) School of Geography, Queen Mary Univ., London, ROYAUME-UNI
(3) Fluid Dynamics Research Group, Dept. of Environment and Soil Sciences, Univ., Lleida, ESPAGNE
(4) Sediment Processes Group, National Inst. of Water and Atmospheric Research (NIWA), Christchurch, NOUVELLE-ZELANDE

Abstract

This paper identifies a threefold set of challenges associated with surveying these dynamic landforms : complex relief, inundated shallow channels and high rates of sediment transport, and terms these challenges the "morphological", "wetted channel" and "mobility" problems, respectively. In an attempt to confront these issues directly, this paper presents a novel survey methodology that combines mobile terrestrial laser scanning and non-metric aerial photography with data reduction and surface modelling techniques to render DEMs from the resulting very high resolution datasets. The approach is used to generate and model a precise, dense topographic dataset for a 2.5 km reach of the braided Rees River, New Zealand. A detailed error analysis of the resulting sub-metre resolution is described to quantify DEM quality across the entire surface model. This reveals unparalleled low vertical errors for such a large and complex surface model

Source

Article of periodic

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

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

Millesime : 2014, vol. 39, no2 [pp. 167-183]

Bibliographic references : 3 p.

Collation : 12 fig., 10 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3437

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