An evaluation of the role of physical models in exploring form–process feedbacks in alluvial fans

Clarke, Lucy E and Quine, Timothy A and Nicholas, Andrew P (2008) An evaluation of the role of physical models in exploring form–process feedbacks in alluvial fans. In: Sediment Dynamics in Changing Environments. International Association of Hydrological Sciences, pp. 175-183. ISBN 978-1-901502-84-8

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Abstract

Alluvial fans represent small-scale coupled transport/depositional systems that provide the opportunity to undertake detailed studies of non-equilibrium landform behaviour. Previous interpretation of fans in the field has tended to emphasise the importance of external controls on their evolution (e.g. climate and tectonics). However, recent theoretical models have shown that internal process-driven feedbacks may be equally important. Using a physical model, image analysis reveals temporal and spatial patterns in flow patterns over the building and fully-developed fan surface, both in the presence and absence of external forcing (change in water–sediment ratios). The pattern observed from the physical model is compared to patterns observed in both numerical model simulations and field fans in the Avoca Valley and Poerua in the Southern Alps, New Zealand. These comparisons led to a preliminary evaluation of the role of physical models in exploring form–process feedbacks in alluvial fans.

Item Type: Book Section
Article Type: Article
Uncontrolled Keywords: alluvial fan; scaling; physical model; numerical model; field; New Zealand
Subjects: G Geography. Anthropology. Recreation > G Geography (General)
G Geography. Anthropology. Recreation > GB Physical geography
Divisions: Schools and Research Institutes > School of Natural & Social Sciences > Environmental Sciences
Research Priority Areas: Environmental Dynamics & Governance
Depositing User: Lucy Clarke
Date Deposited: 11 Jan 2016 12:10
Last Modified: 31 Aug 2016 11:30
URI: http://eprints.glos.ac.uk/id/eprint/2956

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