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Controlling factors of gullying in the Maracujá catchment, southeastern Brazil

Auteurs :
BACELLAR, L.A.P.
COELHO NETTO, A.L.
BACELLAR, L.A.P.
COELHO NETTO, A.L.
LACERDA, W.A.

Description :
An analysis of well known erosion controlling factors was performed, aiming to explain the beginning and evolution of these gullies and to understand the reasons for their spatial distribution. Data shows that geology and, mainly, geomorphology are the main controlling factors, since gullies tend to be concentrated in basement rock areas with lower relief of Maracujá Catchment. The erosion of the resistant soils by human activities (road cuts and trenches), or their mobilization by mudflow movements, seem to be likely mechanisms of gullying initiation. Afterwards, gullies evolve by a combination of surface and underground processes, such as wash and tunnel erosion and falls and slumps of gully walls.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2005, vol. 30, n°. 11, p. 1369-1385, nombre de pages : 17, Collation : Illustration, Références bibliographiques : 53 ref.

Date :
2005

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

Langue :
Anglais
Droits :
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