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A Modular Spatial Interpolation Technique for Monthly Rainfall Prediction in the Northeast Region of Thailand

  • Jesada Kajornrit
  • Kok Wai Wong
  • Chun Che Fung
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 265)

Abstract

Monthly rainfall spatial interpolation is an important task in hydrological study to comprehensively observe the spatial distribution of the monthly rainfall variable in the study area. A number of spatial interpolation methods have been successfully applied to perform this task. However, those methods mainly aim at achieving satisfactory interpolation accuracy and they disregard the interpolation interpretability. Without interpretability, human analysts will not be able to gain insight of the model of the spatial data. This paper proposes an alternative approach to achieve both accuracy and interpretability of the monthly rainfall spatial interpolation solution. A combination of fuzzy clustering, fuzzy inference system, genetic algorithm and modular technique has been used. The accuracy of the proposed method has been compared to the most commonly-used methods in geographic information systems as well as previously proposed method. The experimental results showed that the proposed model provided satisfactory interpolation accuracy in comparison with other methods. Besides, the interpretability of the proposed model could be achieved in both global and local perspectives. Human analysts may therefore understand the model from the derived model’s parameters and fuzzy rules.

Keywords

Monthly Rainfall Spatial Interpolation Modular Technique Fuzzy Clustering Fuzzy Inference System Genetic Algorithm Interpretable Model 

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Jesada Kajornrit
    • 1
  • Kok Wai Wong
    • 1
  • Chun Che Fung
    • 1
  1. 1.School of Engineering and Information TechnologyMurdoch UniversityMurdochAustralia

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