New Zealand Journal of Marine and Freshwater Research abstracts
Modelling the distribution of velocity in a river cross-section
DEREK G. GORING
JEREMY M. WALSH
National Institute of Water & Atmospheric
Research Ltd
P. O. Box 8602
Christchurch, New Zealand
PETER RUTSCHMANN
JÜRG TRÖSCH
Laboratory of Hydraulics, Hydrology and
Glaciology
Swiss Federal Institute of Technology
Zürich, Switzerland
Abstract A method is described for modelling the distribution
of velocity across a river cross-section in a straight reach in uniform, steady
flow. The method uses a finite element model based on a simplified
Navier-Stokes equation and a mixing length hypothesis. The model is applied to
a representative river reach and a comparison is made with velocity gaugings in
the reach. Good agreement is shown where flow conditions match the assumptions
on which the model is based.
Keywords Navier Stokes equations; velocity
distributions; finite element method; river gauging
New Zealand Journal of Marine and Freshwater Research, 1997, Vol. 31,
155-162
0028-8330/97/3102-0155 $7.00/0 (c) The Royal Society of New Zealand
1997
PDF file of entire paper: medium quality (516K); (scanned from paper original: notes about this process)
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