Favorability values of geological, vegetation and relief factors for the development of soil creep landforms

Auteur(s) et Affiliation(s)



Description :
The variables considered in the analysis were : 1) geological-geomorphologic variables : bedrock geology, surficial formations (lithologic and genetic classification), vegetation and presence of rock area, and 2) relief variables : elevation, slope, aspect, curvature, relief index, flow accumulation and Compound Topographic Index (CTI). The influence of each variable in the development of the creep landforms was studied by favorability analysis. The results show that presence of creep landforms is more frequent in slopes with calcareous lithologies and surficial deposits, and in those slopes with higher values of elevation, slope angles of approximately 25-35°, high curvature value and relief index higher than 5 an lower than 9. Nevertheless, some relief variables, such as CTI or flow accumulation (which describes water movement and accumulation over the surface of the slope), do not appear to have a strong influence on the distribution of creep landforms.


Type de document :
Article de périodique

Source :
Zeitschrift für Geomorphologie, issn : 0372-8854, 2012, vol. 56, n°. 1, p. 75-92, nombre de pages : 18, Références bibliographiques : 2 p.

Date :
2012

Editeur :
Pays édition : Allemagne, Stuttgart, Gebruder Borntraeger