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

Abstract (English)

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.