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A model for longitudinal dispersion in channels with pools and riffles

Lookup NU author(s): Professor Eric Valentine, Dr David Swailes

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Abstract

A one-dimensional two-zone mathematical model, comprising a pair of advection-dispersion equations coupled by a mass exchange term, is proposed to study longitudinal dispersion in channels with sequences of pools and riffles. An implicit finite-difference numerical scheme is employed, and its effectiveness is assessed with reference to known analytical solutions. Sets of longitudinal dispersion experiments were performed on various simple geometries of sequences of pools and riffles developed in a laboratory flume. A neutrally buoyant saline dispersant was used and detected with a conductivity method. The results are compared with corresponding numerical solutions to calibrate the two-zone model. The effectiveness of the numerical schemes in solving the two zone model is demonstrated.


Publication metadata

Author(s): Valentine EM, Ali Z, Swailes DC

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: XXIX IAHR Congress

Year of Conference: 2001

Pages: 109-114

Publisher: Tsinghua University Press

URL: http://www.iahr.org/e-library/beijing_proceedings/

Notes: Theme B

Library holdings: Search Newcastle University Library for this item

Sponsor(s): China Institute of Water Resources and Hydropower Research

ISBN: 7900637109


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