Wavelet analysis residual kriging vs. neural network residual kriging

V. Demyanov, S. Soltani, M. Kanevski, S. Canu, M. Maignan, E. Savelieva, V. Timonin, V. Pisarenko

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

This paper deals with the problem of spatial data mapping. A new method based on wavelet interpolation and geostatistical prediction (kriging) is proposed. The method - wavelet analysis residual kriging (WARK) - is developed in order to assess the problems rising for highly variable data in presence of spatial trends. In these cases stationary prediction models have very limited application. Wavelet analysis is used to model large-scale structures and kriging of the remaining residuals focuses on small-scale peculiarities. WARK is able to model spatial pattern which features multiscale structure. In the present work WARK is applied to the rainfall data and the results of validation are compared with the ones obtained from neural network residual kriging (NNRK). NNRK is also a residual-based method, which uses artificial neural network to model large-scale non-linear trends. The comparison of the results demonstrates the high quality performance of WARK in predicting hot spots, reproducing global statistical characteristics of the distribution and spatial correlation structure.

Original languageEnglish
Pages (from-to)18-32
Number of pages15
JournalStochastic Environmental Research and Risk Assessment
Volume15
Issue number1
DOIs
Publication statusPublished - Mar 2001

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Water Science and Technology
  • Safety, Risk, Reliability and Quality
  • Environmental Science(all)

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