Sediment source changes over the last 250 years in a dry-tropical catchment, central Queensland, Australia

Auteur(s) et Affiliation(s)

HUGHES, A.O.

School of Physical Environmental and Mathematical Sciences, Univ. of New South Wales, Canberra, Australie

OLLEY, J.M.

Australian Rivers Inst., Griffith University, Nathan, Australie

CROKE, J.C.

School of Physical Environmental and Mathematical Sciences, Univ. of New South Wales, Canberra, Australie

MCKERGOW, L.A.

National Inst. of water and Atmospheric Research, Hamilton, Nouvelle-Zelande

Description :
This study examines the sediment sources from Theresa Creek, a 6000 km2 subcatchment of the Fitzroy River basin in central Queensland. Fallout radionuclide concentrations are used to determine the relative contribution of channel and hillslope sediment sources. Geochemical properties of river bed and floodplain sediments are used to determine recent and historical (ca. 250 years BP) spatial provenance of transported sediment. Optical dating and a Cs 137 depth profile provide information on the timing of floodplain sediment deposition. The relationship between erosion type and spatial provenance is described and inferences made on how the relative contribution of hillslope and channel sources have been affected by post-European settlement land use changes.

Type de document :
Article de périodique

Source :
Geomorphology (Amsterdam), issn : 0169-555X, 2009, vol. 104, n°. 3-4, p. 262-275, nombre de pages : 14, Références bibliographiques : 1 p.

Date :
2009

Editeur :
Pays édition : Pays-Bas, Amsterdam, Elsevier

Langue :
Anglais