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Investigations into the relationship between changes in internal moisture regimes and rock surface deterioration in cavernous sandstone features

Auteur(s) et Affiliation(s)

MOL, L.
School of Geography and the Environment, Univ., Oxford, Royaume-Uni


Description :
In this study the role of internal moisture movement is tested through monitoring moisture and surface deterioration dynamics in April 2008 and April 2009 within 2 large cavernous features (mega-tafoni) in the Golden Gate Highlands National Park, South Africa (GGHNP). Data are presented from surveys of internal moisture (using electrical resistivity tomography, ERT), surface moisture (using a Protimeter) and deterioration (using surface hardness as recorded with an Equotip as a proxy for surface deterioration) across 5 transects. In addition a high resolution temperature record is presented to assess the influence of micro-climates within the caverns. The presence of well-established biofilms suggests an even more complex interaction between moisture, surface development and biological activity. A model is presented therefore which integrates this paradox by proposing a non-linear relationship between moisture dynamics, facilitation of biofilm formation, and deterioration within cavernous features.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2014, vol. 39, n°. 7, p. 914-927, nombre de pages : 14, Références bibliographiques : 1 p.

Date :
2014

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

Langue :
Anglais
Droits :
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