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Sediment connectivity : a framework for understanding sediment transfer at multiple scales.

Bracken, L.J. and Turnbull, L. and Wainwright, J. and Bogaart, P. (2015) 'Sediment connectivity : a framework for understanding sediment transfer at multiple scales.', Earth surface processes and landforms., 40 (2). pp. 177-188.


A major challenge for geomorphologists is to scale up small-magnitude processes to produce landscape form, yet existing approaches have been found to be severely limited. New ways to scale erosion and transfer of sediment are thus needed. This paper evaluates the concept of sediment connectivity as a framework for understanding processes involved in sediment transfer across multiple scales. We propose that the concept of sediment connectivity can be used to explain the connected transfer of sediment from a source to a sink in a catchment, and movement of sediment between different zones within a catchment: over hillslopes, between hillslopes and channels, and within channels. Using fluvial systems as an example we explore four scenarios of sediment connectivity which represent end-members of behaviour from fully linked to fully unlinked hydrological and sediment connectivity. Sediment-travel distance – when combined with an entrainment parameter reflecting the frequency–magnitude response of the system – maps onto these end-members, providing a coherent conceptual model for the upscaling of erosion predictions. This conceptual model could be readily expanded to other process domains to provide a more comprehensive underpinning of landscape-evolution models. Thus, further research on the controls and dynamics of travel distances under different modes of transport is fundamental.

Item Type:Article
Keywords:Sediment connectivity, Sediment-travel distance, Hydrological connectivity, Landscape form, Frequency-magnitude.
Full text:(AM) Accepted Manuscript
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Publisher statement:This is the accepted version of the following article: Bracken L. J., Turnbull L., Wainwright J. and Bogaart P. (2015), Sediment connectivity: a framework for understanding sediment transfer at multiple scales, Earth Surface Processes and Landforms, 40 (2): 177–188, which has been published in final form at This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Date accepted:31 July 2014
Date deposited:05 February 2015
Date of first online publication:17 September 2014
Date first made open access:No date available

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