Selective withdrawal from stratified reservoirs
Speaker: Graeme Hocking, Murdoch University, Australia
Date: Tuesday 7th July 2015
Time: 3pm
Venue: UCD Science Hub, room H1.47 (located on the left side of the corridor connecting between Science East and Science Hub)
Abstract:
Water contained in storage reservoirs in temperate climates is stratified in density for most of the year due to variations in temperature and
salinity. When water is withdrawn for irrigation, town supply and reservoir management its origin from within the reservoir depends on a number of factors. This problem has been of interest since the early 1900s and the first papers on the practical application appeared in the late 1940s. This was followed by a period of intense research activity involving both experimental and theoretical work that provided an outline of the general behaviour of such flows, but as always threw up a number of further questions. The details for nonlinear stratifications were difficult to obtain and so in most cases a linear approximation was used for 'real' modelling of lakes and reservoirs. Fast computers and better algorithms now allow a much more accurate representation of these flows including nonlinearity and complicated geometries, yet there remain a number of unsolved questions.
A history of the study and understanding of this problem and the techniques employed to examine it will be given, including some interesting mathematical and numerical problems that have arisen. There will be movies! Some recent results will be given
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