Stuck at the bar: larger‐than‐average grain lag deposits and the spectrum of particle mobility

Williams, R.D. , Reid, H.E. and Brierley, G. (2019) Stuck at the bar: larger‐than‐average grain lag deposits and the spectrum of particle mobility. Journal of Geophysical Research: Earth Surface, 124(12), pp. 2751-2756. (doi: 10.1029/2019JF005137)

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Abstract

Larger‐than‐average grain deposits in gravel‐bed rivers potentially exert a distinctive influence upon fluvial morphodynamics and flow resistance. They are products of historical contingency; sourced from rare events that supply atypically coarse material. Larger‐than‐average grain lag deposits are emblematic attributes of the Tongariro River, New Zealand. They are deposited on bar edges and heads. Derived from lahar valley floor deposits that subsequently became terraces, these materials are less likely to be reworked across a range of flows compared to other bar material. Conceptual models that consider channel configuration and incorporate distributions of particle mobility and flood flows are necessary to assess the role of larger‐than‐average grain deposits on river morphodynamics

Item Type:Articles
Additional Information:Fieldwork was funded by a University of Auckland Doctoral scholarship awarded to HER
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Williams, Dr Richard
Authors: Williams, R.D., Reid, H.E., and Brierley, G.
College/School:College of Science and Engineering > School of Geographical and Earth Sciences
Journal Name:Journal of Geophysical Research: Earth Surface
Publisher:Wiley
ISSN:2169-9011
ISSN (Online):2169-9011
Published Online:10 December 2019
Copyright Holders:Copyright © 2019 American Geophysical Union
First Published:First published in Journal of Geophysical Research: Earth Surface 124(12): 2751-2756
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher
Related URLs:
Data DOI:10.5525/gla.researchdata.796

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