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Environmental change during the Pleistocene and Holocene: Estuaries and lagoons of southern Africa

De Lecea, Ander, Green, Andrew N. and Cooper, Andrew (2016) Environmental change during the Pleistocene and Holocene: Estuaries and lagoons of southern Africa. In: Quaternary Environmental Change in Southern Africa: Physical and Human Dimensions. Cambridge University Prress, pp. 219-233. ISBN 9781316572900 [Book section]

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Abstract

The South African coast contains abundant estuaries and lagoons, most of which originated as river valleys incised during Quaternary sea-level fall and subsequently drowned and/or infilled during rising interglacial sea levels. This chapter discusses these changes and highlights the geomorphological and sedimentological evolution of several southern African estuaries during the Pleistocene to present. The development, infilling and positioning of incised valley systems is mainly controlled by sea-level variation as well as fluvial and marine sediment supply. Most contemporary estuaries in southern Africa show dramatic responses to shorter term sea-level fluctuations and sediment supply during the Holocene. Barring anthropogenic interference, the dynamic behaviour of estuaries, dictated by their transient position and geomorphic character within an incised valley, is considered to fluctuate on centennial to millennial timescales.

Item Type:Book section
Keywords:Estuary, lagoon, sea level
Faculties and Schools:Faculty of Life and Health Sciences > School of Geography and Environmental Sciences
Faculty of Life and Health Sciences
Research Institutes and Groups:Environmental Sciences Research Institute > Coastal Systems
Environmental Sciences Research Institute
ID Code:36995
Deposited By: Professor Andrew Cooper
Deposited On:21 Feb 2017 11:08
Last Modified:21 Feb 2017 11:08

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