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(Article of periodic en Anglais - 2014)

Document title

Using 3D photo-reconstruction methods to estimate gully headcut erosion

Authors(s) and Affiliation(s)

GÓMEZ-GUTIÉRREZ Á. (1) ; SCHNABEL S. (1) ; BERENGUER-SEMPERE F. (2) ; LAVADO-CONTADOR F. (1) ; RUBIO-DELGADO J. (1) ;
(1) GeoEnvironmental Research Group, Univ. de Extremadura, Cáceres, ESPAGNE
(2) Technical College, Univ. of Extremadura, Cáceres, ESPAGNE

Abstract

Three-dimensional photo-reconstruction methods (3D-PR) based on Structure from Motion (SfM) and MultiView-Stereo (MVS) techniques are tested for estimating the volume of gully headcut retreat. The study was carried out using 5 small headcuts in the Parapuños experimental catchment, SW Spain : 2 headcuts located along the channel and 3 lateral-bank headcuts. Firstly, the accuracy of the resulting models was tested using as benchmark a 3D model obtained by means of a Terrestrial Laser Scanner (TLS). Results of this analysis showed centimetre-level accuracies with average distances between the 2 point clouds for the 5 headcuts ranging from 0.009 m to 0.025 m. Then, using a Digital Elevation Model of Differences approach (DoDs) the volume of soil loss was estimated for every headcut. Total soil loss, erosion and deposition, was evaluated for a wet period (289 mm) of 54 days in 2013. Additionally, the use of historical photographs was explored with the aim of estimating long or medium-term erosion rates in gully heads. It is concluded that 3D-PR techniques showed a great potential for studying detailed geomorphic changes

Source

Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 2014, vol. 120 [pp. 91-101]

Bibliographic references : 45 ref.

Collation : 5 fig., 3 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2014.04.004

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
Refdoc record number (ud4) : 28681847 : Permanent link - XML version
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