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Part of book or chapter of book . 2008 . Peer-reviewed
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Tecnologías de la información geográfica para la evaluación morfométrica del volcanismo

Authors: Rodríguez González, Alejandro; Fernandez-Turiel, J. L.; Pérez Torrado, Francisco José; Gimeno, D.; Aulinas, M.;

Tecnologías de la información geográfica para la evaluación morfométrica del volcanismo

Abstract

[ES] A partir de una cuidadosa reconstrucción paleogeomorfológica del terreno volcánico puede realizarse un modelado morfométrico preciso, gracias al cual y partiendo de la topografía actual se obtienen mapas topográficos y modelos digita-les del terreno (MDT) previos y posteriores a la erupción. Para su logro, es necesario discutir el tamaño de pixel correcto, los métodos de interpolación y la calidad de los MDT, es decir, deben definirse los criterios necesarios para determinar la precisión y exactitud de los distintos parámetros morfométricos. En un entorno de Sistema de Información Geográfico (SIG), la información geológica de los conos, lavas y depósitos piroclásticos de caída, así como los MDT antes menciona-dos, permiten determinar las principales características morfológicas de estos edificios (e.g., volumen de materiales, pen-dientes del terreno pre-erupción y post-erupción, simetría de los conos, etc.). La calibración y validación de los modelos morfométricos se realizó en terrenos volcánicos simulados, mientras que para la verificación se tomó como ejemplo volca-nes de menos de 10.000 años en Gran Canaria que se encuentran muy bien preservados. La metodología desarrollada tiene un interés general, siendo aplicable igualmente a otros contextos geodinámicos, tanto en la Tierra como en otros planetas interiores del Sistema Solar.

[EN] An accurate and precise morphometric modelling can be extended to past eruptions after a careful paleogeomor-phological reconstruction of volcanic landforms in a setting of oceanic island. This reconstruction was used to create con-tour maps to derive the pre-, post-eruption and present-day digital elevation models (DEM). The right pixel size, interpola-tion method and quality of these DEMs were discussed. The process in a GIS framework of the geological information of cone, lava flow and tephra fall deposits together and the before-mentioned DEMs allowed determining the main morpho-logical features of these volcanic landforms and their derivatives (e.g., eruption volume and pre-eruption slopes). The criteria needed to obtain accurate and precise measurements of the currently used morphometric parameters were defined. The calibration and validation of the morphometric modelling was performed on simulated volcanic landforms. The verifi-cation of the procedures was carried out on recent (<10,000 yr) volcanoes at Gran Canaria Island (Spain), the erosional history of which is in the first step of degradation. The proposed morphome-tric modelling is of general interest due to it is applicable to other geotectonic settings in the Earth and in the other inner planets of the Solar System.

Este trabajo se enmarca en los proyectos PI2002/148 del Gobierno de Canarias; GRANCA (Ref. CGL2004-04039/BTE) de la CICYT y el Grupo de Investigación Consolidado PEGEFA (SGR-2005-795, Gene-ralitat de Catalunya).

10 páginas, 5 tablas.-- Trabajo presentado en el XIII Congreso Nacional de Tecnologías de la Información Geográfica (Las Palmas de Gran Canaria-España, 2008).

Peer reviewed

Keywords

Volcán, MDT, Morphometry, DEM, Morfometría, Lava flow, GIS, SIG, Volcano, Lava

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
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