Time series analysis on ammonia concentration and load values of the river Rhine |
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| Authors: | P.J.W.M Mü skens,W.G.J Hensgens |
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| Affiliation: | Catholic University of Nijmegen, Department of Analytical Chemistry, Faculty of Science, Toernooiveld, Nijmegen, The Netherlands |
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| Abstract: | The autocorrelation technique is applied to ammonia data observed in the river Rhine and is used for two purposes. On one hand the error in the determination of the NH4+-concentration, caused by both analysing and sampling errors, can be quantified. On the other hand the behaviour of the NH4+-concentration and NH4+-load is described. It is indicated that the NH4+-load is a stochastic variable containing a periodicity, whereas the NH4+-concentration is a merely stochastic variable with a large time constant. |
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