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Fuzzy rule-based model for contaminant transport in a natural river channel.

Kettle, Helen and Hankin, Barry G. and Beven, Keith J. (2002) Fuzzy rule-based model for contaminant transport in a natural river channel. Journal of Hydroinformatics, 4 (1). pp. 53-62. ISSN 1464-7141

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Abstract

Fuzzy rules are used to model solute dispersion in a river dead zone, such that the turbulent diffusion is determined by a fuzzy inference system which relates the local mean velocity shear to the longitudinal velocity fluctuations. A finite-volume hybrid scheme is applied to a non-orthogonal grid for which a mean velocity field is produced using the computational fluid dynamics (CFD) package Telemac 2D. At each cell face fuzzy rules predict a fuzzy number, and these numbers reflect the possible magnitudes of turbulent velocity fluctuations. These are input to the finite-volume model using a single-value simulation method. Multiple model runs produce a fuzzy number for the solute concentration in each cell. The results of the fuzzy model are then compared with data collected in a field experiment with rhodamine dye in the River Severn.

Item Type: Article
Journal or Publication Title: Journal of Hydroinformatics
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 21473
Deposited By: ep_ss_importer
Deposited On: 15 Jan 2009 09:32
Refereed?: Yes
Published?: Published
Last Modified: 09 Apr 2014 20:25
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/21473

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