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Development of an ephemeral gully erosion model:the role of undercutting in bank failure of small channels

Street, L and Quinton, JN (2001) Development of an ephemeral gully erosion model:the role of undercutting in bank failure of small channels. In: Soil Erosion Research for the 21st Century, Proceedings of the International Symposium (3-5 January 2001, Honolulu, HI, USA). American Society of Agricultural Engineers, pp. 338-341.

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Abstract

This paper describes an event-based, process-oriented, ephemeral gully erosion model for predicting soil erosion by concentrated overland flow from fields and small catchments. It is designed as a new component for the European Soil Erosion Model (EUROSEM). The ephemeral gully model uses a transport capacity approach to simulate simultaneous soil detachment, transport and deposition. Discharge and sediment concentration are calculated by solution of the dynamic mass balance equations for water and sediment respectively. The model accounts for changes in gully geometry due to lateral erosion, bed degradation, bank failure, and sediment deposition. The bank failure sub-model assumes cantilever failure dominates and is related to cantilever width, bank geometry, and the influence of rapid drawdown. Key features of the model are outlined together with plans for further research.

Item Type: Contribution in Book/Report/Proceedings
Uncontrolled Keywords: Soil erosion modelling ; Ephemeral gully ; Bank stability ; EUROSEM
Subjects: UNSPECIFIED
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 51600
Deposited By: ep_importer_pure
Deposited On: 24 Nov 2011 11:48
Refereed?: No
Published?: Published
Last Modified: 26 Jul 2012 23:09
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/51600

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