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Optimal division of data for neural network models in water resources applications

Open access
Bowden, Gavin J., Maier, Holger R., Dandy, Graeme C.·2002·Water Resources Research

Abstract

The way that available data are divided into training, testing, and validation subsets can have a significant influence on the performance of an artificial neural network (ANN). Despite numerous studies, no systematic approach has been developed for the optimal division of data for ANN models. This paper presents two methodologies for dividing data into representative subsets, namely, a genetic algorithm (GA) and a self‐organizing map (SOM). These two methods are compared with the conventional approach commonly used in the literature, which involves an arbitrary division of the data. A case study is presented in which ANN models developed using each data division technique are used to forecast salinity in the River Murray at Murray Bridge (South Australia) 14 days in advance. When tested on a validation data set from July 1992 to March 1998, the models developed using the GA and SOM data division techniques resulted in a reduction in RMS error of 24.2% and 9.9%, respectively, over the conventional data division method. It was found that a SOM could be used to diagnose why an ANN model has performed poorly, given that the poor performance is primarily related to the data themselves and not the choice of the ANN's parameters or architecture.

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Metadata

Authors
Bowden, G. J., Maier, H. R., & Dandy, G. C.
Venue
Water Resources Research
Published
2002-02
Volume
38
Issue
2
ISSN
  • 0043-1397 (ISSN-L)
  • 1944-7973
OpenAlex
W1912463333
Cited by
322
References
25
FWCI
18.14
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Optimal division of data for neural network models in water resources applications. https://app.cochat.ai/papers/10.1029/2001wr000266
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Bowden, G. J., Maier, H. R., & Dandy, G. C. (2002). Optimal division of data for neural network models in water resources applications. Water Resources Research. https://doi.org/10.1029/2001wr000266

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