Un método regresión por submuestreo para estimar el estado cualitativo y cuantitativo del agua subterránea

Translated title of the contribution: A subagging regression method for estimating the qualitative and quantitative state of groundwater

Jina Jeong, Eungyu Park, Weon Shik Han, Kue Young Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A subsample aggregating (subagging) regression (SBR) method for the analysis of groundwater data pertaining to trend-estimation-associated uncertainty is proposed. The SBR method is validated against synthetic data competitively with other conventional robust and non-robust methods. From the results, it is verified that the estimation accuracies of the SBR method are consistent and superior to those of other methods, and the uncertainties are reasonably estimated; the others have no uncertainty analysis option. To validate further, actual groundwater data are employed and analyzed comparatively with Gaussian process regression (GPR). For all cases, the trend and the associated uncertainties are reasonably estimated by both SBR and GPR regardless of Gaussian or non-Gaussian skewed data. However, it is expected that GPR has a limitation in applications to severely corrupted data by outliers owing to its non-robustness. From the implementations, it is determined that the SBR method has the potential to be further developed as an effective tool of anomaly detection or outlier identification in groundwater state data such as the groundwater level and contaminant concentration.

Original languageSpanish
Pages (from-to)1491-1500
Number of pages10
JournalHydrogeology Journal
Volume25
Issue number5
DOIs
Publication statusPublished - 2017 Aug 1

Fingerprint

groundwater
outlier
uncertainty analysis
method
anomaly
pollutant
trend

All Science Journal Classification (ASJC) codes

  • Water Science and Technology
  • Earth and Planetary Sciences (miscellaneous)

Cite this

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title = "Un m{\'e}todo regresi{\'o}n por submuestreo para estimar el estado cualitativo y cuantitativo del agua subterr{\'a}nea",
abstract = "A subsample aggregating (subagging) regression (SBR) method for the analysis of groundwater data pertaining to trend-estimation-associated uncertainty is proposed. The SBR method is validated against synthetic data competitively with other conventional robust and non-robust methods. From the results, it is verified that the estimation accuracies of the SBR method are consistent and superior to those of other methods, and the uncertainties are reasonably estimated; the others have no uncertainty analysis option. To validate further, actual groundwater data are employed and analyzed comparatively with Gaussian process regression (GPR). For all cases, the trend and the associated uncertainties are reasonably estimated by both SBR and GPR regardless of Gaussian or non-Gaussian skewed data. However, it is expected that GPR has a limitation in applications to severely corrupted data by outliers owing to its non-robustness. From the implementations, it is determined that the SBR method has the potential to be further developed as an effective tool of anomaly detection or outlier identification in groundwater state data such as the groundwater level and contaminant concentration.",
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Un método regresión por submuestreo para estimar el estado cualitativo y cuantitativo del agua subterránea. / Jeong, Jina; Park, Eungyu; Han, Weon Shik; Kim, Kue Young.

In: Hydrogeology Journal, Vol. 25, No. 5, 01.08.2017, p. 1491-1500.

Research output: Contribution to journalArticle

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