Factor analytical study on water quality in Lake Saimaa, Finland |
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Authors: | Satu-Pia Reinikainen Pertti Laine Pentti Minkkinen Pentti Paatero |
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Institution: | (1) Lappeenranta University of Technology, Department of Chemical Technology, P.O. Box 20, FIN-53851 Lappeenranta, Finland, FI;(2) Lake Saimaa Water Protection Association, P.O. Box 17, FIN-53851 Lappeenranta, Finland, FI;(3) Helsinki University, Department of Physics, FIN-00100 Helsinki, Finland e-mail: satu-pia.mujunen@lut.fi, FI |
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Abstract: | Multivariate data analysis methods (4-way Candecomp-PARAFAC model solved with Multilinear Engine (ME-1)) were used to interpret
the data of over two decades to study the changes in the water of Lake Saimaa in Finland. Earlier studies have shown that
it is difficult to extract the natural background from the other sources of variation. By using the multilinear model three
interpretable factors representing natural and anthropogenic processes could be extracted. The natural long-term variation,
seasonal fluctuation and dilution of discharges in the recipient area could be extracted into their own factors, which could
be easily visualized. The variation could be also presented with estimated variation in the water quality parameters caused
by each of these natural or anthropogenic processes.
Received: 27 September 2000 / Revised: 11 January 2001 / Accepted: 14 January 2001 |
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