Photogrammetric monitoring of small streams under a riparian forest canopy

Auteur(s) et Affiliation(s)

BIRD, S.

Fluvial Systems Research Inc., White Rock, Canada

HOGAN, D.

BC Ministry of Forests and Range, Research Branch, Victoria, Canada

SCHWAB, J.

BC Ministry of Forests and Range, Northern Interior Forest Region, Prince George, Canada

Description :
This paper presents a technique for the capture and analysis of close-range photogrammetric data acquired from a vertically mounted non-metric camera suspended 10 m above the channel bed by a unipod. The camera is positioned under the riparian forest canopy so that the channel bed can be imaged without obstruction. DEMs generated from this platform required post-possessing to either adjust or eliminate erroneous cells introduced by the extraction process, overhanging branches, and by the effects of refraction at the air–water interface for submerged portions of the channel bed. The vertical precision in the post-processed surface is depending on the quality of triangulation and the characteristics of the surface being imaged.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2010, vol. 35, n°. 8, p. 952-970, nombre de pages : 19, Références bibliographiques : 1,5 p.

Date :
2010

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais