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(Article of periodic en Anglais - 2011)

Document title

Dynamic controls on wind erosion and dust generation on west-central Free State agricultural land, South Africa

Authors(s) and Affiliation(s)

WIGGS G. (1) ; HOLMES P. (2) ;
(1) School of Geography and the Environment, Univ., Oxford, ROYAUME-UNI
(2) Dep. of Geography, Univ. of the Free State, Bloemfontein, AFRIQUE DU SUD

Abstract

The west-central part of South Africa's Free State Province falls within the transition zone between South Africa's sub-humid, temperate grasslands to the east, and the semi-arid Karoo and arid Kalahari to the south and west, respectively. This study is the first to quantify the degree of wind erosion on the agricultural soils in this region under prevailing winter to spring climatic conditions and land management practices. Using arrays of cup anemometers, dust deposition traps and saltation impact sensors (Safires), measurements were made of the key erosivity and erodibility drivers that control the degree of wind erosion. Results demonstrate that significant quantities of dust are mobilized, particularly during the months of September and October. Thresholds of wind erosion are shown to respond particularly closely to changes in surface and aerodynamic roughness

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2011, vol. 36, no6 [pp. 827-838]

Bibliographic references : 1 p.

Collation : 10 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2110

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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