Aplicação de krigagem com correção do efeito de suavização em dados de potenciometria da cidade de Pereira Barreto - SP

Authors

  • Marcelo Monteiro da Rocha Universidade de São Paulo; Instituto de Geociências; Departamento de Geologia Sedimentar e Ambiental
  • Débora Amato Lourenço Votorantim Metais
  • Cláudio Benedito Baptista Leite IPT; Seção de Recursos Hídricos

DOI:

https://doi.org/10.5327/Z1519-874x2007000200003

Keywords:

Geostatistics, non-stationary variogram, kriging of residuals, kriging with smoothing effect correction, potentiometric surface, Hydrogeology

Abstract

This work deals with geostatistical analysis and the estimation of hydraulic head data using two methods: ordinary kriging and kriging with correction of the smoothing effect. Both methods were applied in order to verify which one better reproduces the potentiometric surface of Pereira Barreto - SP. The data were drawn from the Três Irmãos Reservoir, and are composed of 186 sample points with hydraulic head information, measured during the installation of the dam. The studied variable presented non stationary semivariograms, interpreted as the result of a regional drift. To remove this drift a first-degree polynomial surface was computed, and geostatistics evaluated the residuals. The kriging procedure with correction of the smoothing effect gives a more faithful reproduction of the potentiometric data, since the variance was greater than that obtained by ordinary kriging.

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Published

2007-10-01

Issue

Vol. 7 No. 2 (2007)

Section

Articles

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How to Cite

Rocha, M. M. da, Lourenço, D. A., & Leite, C. B. B. (2007). Aplicação de krigagem com correção do efeito de suavização em dados de potenciometria da cidade de Pereira Barreto - SP . Geologia USP. Série Científica, 7(2), 37-48. https://doi.org/10.5327/Z1519-874x2007000200003