Volume estimation of the 1998 flank collapse at Casita volcano, Nicaragua : a comparison of photogrammetric and conventional techniques

Auteur :
KERLE, N.

Description :
In october 1998, a precipitation-triggered flank collapse occurred at Casita volcano, leading to a devastating lahar. In this paper the failure volume was calculated using a range of methods. Several pre- and post-failure digital elevation models (DEMs) were created, based on photogrammetric, cartometric and surveying data. The best estimate for the failure volume is based on a vegetation-corrected pre-failure DEM, generated using automated digital photogrammetry, and a post-failure surface based on a field survey carried out with a Total Station. It is demonstrated that values reported in the literature must be regarded with caution.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2002, vol. 27, n°. 7, p. 759-772, nombre de pages : 14, Collation : Illustration, Références bibliographiques : 30 ref.

Date :
2002

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