Abstract
Correlation measures are used in a range of applications to quantify the similarity between time-series, often between model output and observed data. A software tool implemented by the authors uses optimisation to identify a system’s Residence Time Distribution (RTD) from noisy solute transport laboratory data. As part of the further development of the tool, an investigation has been undertaken to determine the most suitable correlation measures, both for solute transport model identification as an optimisation constraint and as an objective means of solute transport model evaluation. Correlation measures potentially suitable for use with solute transport data were selected for evaluation. The evaluation was carried out by manipulating synthetic dye traces in ways that reflect common solute transport model discrepancies. The conditions tested include change in number of sample points (discretisation/series length), transformation (scaling, etc.), transformation magnitude, and noise. BLC, \({\chi ^{2}}\), FFCBS, \(\mathrm R ^{2}\), RMSD, \(\text{ R}_\mathrm{t}^{2}\), ISE, and APE show favourable characteristics for use in model identification. Of these, \(\text{ R}^{2}\), \(\text{ R}{}_\mathrm{t}^{2}\) and APE are non-dimensional and so are also suitable for model evaluation.
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Sonnenwald, F., Stovin, V., Guymer, I. (2013). Correlation Measures for Solute Transport Model Identification and Evaluation. In: Rowiński, P. (eds) Experimental and Computational Solutions of Hydraulic Problems. GeoPlanet: Earth and Planetary Sciences. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-30209-1_28
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DOI: https://doi.org/10.1007/978-3-642-30209-1_28
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