Block removal and step backwearing as erosion processes on rock shore platforms: a preliminary case study of the chalk shore platforms of south-east England

Auteur(s) et Affiliation(s)



Description :
A combination of soft copy photogrammetry, ortho-rectification, geo referencing and field measurement of step height are linked in a GIS environment to measure step retreat on chalk shore platforms at sample sites in the south of England over 2 periods, 1973–2001, 2001–2007. The methods used allow for the identification, delineation and measurement of historic change at high spatial resolution. The results suggest that while erosion of chalk shore platforms by step backwearing is highly variable, it appears to be of similar magnitude to surface downwearing of the same platforms measured by micro-erosion meters (MEMs) and laser scanning. Results from the more recent years' data suggests that step retreat has variability in both space and time which does not relate solely to climatic variability.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2011, vol. 36, n°. 5, p. 661-671, nombre de pages : 11, Références bibliographiques : 25 ref.

Date :
2011

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