Large-scale patterns of erosion and sediment transport in river networks, with examples from Australia
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Published:2001
Issue:1
Volume:52
Page:81
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ISSN:1323-1650
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Container-title:Marine and Freshwater Research
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language:en
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Short-container-title:Mar. Freshwater Res.
Author:
Prosser Ian P.,Rutherfurd Ian D.,Olley Jon M.,Young William J.,Wallbrink Peter J.,Moran Chris J.
Abstract
This paper examines the patterns of sediment transport in rivers in terms of
the sources of sediment and its transport and deposition through the river
network. The analysis is in the context of dramatic human influences on river
sediment transport and how they might influence freshwater ecosystems. The
review of Australian work shows that erosion of hillslopes and stream banks
has greatly increased in historical times, supplying vast quantities of
sediment to rivers, much of which is still stored within the river system. The
stored sediment will continue to effect in-stream and estuarine ecosystems for
many decades. In most Australian catchments the dominant source of sediment is
streambank erosion. An analysis of historical channel widening suggests that a
conceptual framework of relative stream power can explain the diversity of
behaviour observed in the numerous case studies. Sediment delivery through
catchments is considered first in a generic whole network sense, which
emphasizes the crucial role played by riverine deposition in determining
catchment sediment budgets. A method is then presented for analysing the
diverse spatial patterns of sediment storage in any river network. Finally,
the paper considers the temporal changes to channel morphology in response to
a human-induced pulse of sediment.
Publisher
CSIRO Publishing
Subject
Ecology,Aquatic Science,Ecology, Evolution, Behavior and Systematics,Oceanography
Cited by
218 articles.
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