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Title: The complexities of measuring fine sediment accumulation within gravel-bed rivers
Authors: Harper, S.E.
Foster, I.D.L.
Lawler, D.M.
Mathers, Kate L.
McKenzie, M.
Petts, G.E.
Keywords: Fine sediment
Gravel bed rivers
Hydrological exchange
Sediment trap design
Sedimentation
Vertical and lateral transport
Issue Date: 2017
Publisher: Wiley © The Authors
Citation: HARPER, S.E. ... et al, 2017. The complexities of measuring fine sediment accumulation within gravel-bed rivers. River Research and Applications, doi: 10.1002/rra.3198.
Abstract: Fine sediment storage within gravel beds is a key component of catchment sediment budgets and affects the health of benthic and hyporheic habitats. Here, we assess the performance of two substrate infiltration traps for the characterization of fine sediment ( < 2 mm) accumulation. One design, the vertically extending sediment trap, permits both lateral and vertical exchange in the sediment column, whereas the second type, a more traditional fixed-area sediment trap with impermeable side walls, permits only vertical exchange. Traps were deployed at three sites on the River Tame, Birmingham (UK), over varying installation periods (14-401 days). Results indicate that the facilitation of multiple pathways of exchange within the vertically extending sediment traps (vertical and lateral) resulted in a significantly greater amount of fine sediment being accumulated than in adjacent fixed-area sediment traps. This suggests that lateral transport is an important component contributing to fine sediment accumulation. However, there are notable and inherent problems associated with the use of different types of sediment trap and in the way the data should be presented and interpreted. This paper discusses the practical implications of the study findings and reflects on the complexities of undertaking accurate sediment deposition measurements in the field.
Description: This is an Open Access Article. It is published by Wiley under the Creative Commons Attribution 4.0 International Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/
Sponsor: The support of the UK Natural Environment Research Council in providing a Research Grant (GST032604) under the URGENT thematic programme through a PhD studentship is gratefully acknowledged.
Version: Published
DOI: 10.1002/rra.3198
URI: https://dspace.lboro.ac.uk/2134/27023
Publisher Link: https://doi.org/10.1002/rra.3198
ISSN: 1535-1459
Appears in Collections:Published Articles (Geography)

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