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11 - Changes in fluvial systems during the Quaternary

Published online by Cambridge University Press:  05 June 2016

By
Stephen Tooth
Edited by
Jasper Knight  and
Stefan W. Grab
Jasper Knight
Affiliation:
University of the Witwatersrand, Johannesburg
Stefan W. Grab
Affiliation:
University of the Witwatersrand, Johannesburg
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Summary

Abstract

Despite their potential importance, southern Africa’s fluvial systems have yet to be fully exploited as archives of Quaternary palaeoenvironmental changes. This chapter outlines the regional environmental setting, and reviews the nature and drivers of southern African fluvial system responses, focusing mainly on examples where a secure geochronology exists. A key message is the need for recognition of diversity in the nature and drivers of Quaternary fluvial system change. Across the subcontinent, physiographic, tectonic, geological, climatic, vegetative – and more recently, anthropogenic – factors have combined in various ways to produce a variety of fluvial system responses that may incorporate aspects of channel lateral migration, avulsion, aggradation and/or incision. Depending on factors such as catchment scale and geomorphic setting, different fluvial systems exhibit differing sensitivities to natural and anthropogenic drivers, in turn influencing the production and preservation of fluvial sedimentary archives.

Type
Chapter
Information
Quaternary Environmental Change in Southern Africa
Physical and Human Dimensions
 , pp. 170 - 187
Publisher: Cambridge University Press
Print publication year: 2016

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