Fluoride characterization by principal component analysis in the hydrochemical facies of Serra Geral Aquifer System in Southern Brazil

被引：11

作者：

Nanni, Arthur ^{[1
]}

Roisenberg, Ari ^{[1
]}

Fachel, Jandyra M. G. ^{[2
]}

Mesquita, Gilberto

Danieli, Cristiano

机构：

[1] Univ Fed Rio Grande do Sul, Inst Geociencias, Dept Geoquim, BR-91501970 Porto Alegre, RS, Brazil

[2] Univ Fed Rio Grande do Sul, Inst Matemat, Dept Estatist, BR-91501970 Porto Alegre, RS, Brazil

来源：

ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS | 2008年 / 80卷 / 04期

关键词：

fractured aquifer; geostatistics; GIS; groundwater; hydrogeology;

D O I：

10.1590/S0001-37652008000400010

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Principal component analysis is applied to 309 groundwater chemical data information from wells in the Serra Geral Aquifer System. Correlations among seven hydrochemical parameters are statistically examined. A four-component model is suggested and explains 81% of total variance. Component 1 represents calcium-magnesium bicarbonated groundwaters with long time of residence. Component 2 represents sulfated and chlorinated calcium and sodium groundwaters; Component 3 represents sodium bicarbonated groundwaters; and Component 4 is characterized by sodium sulfated with high fluoride facies. The components' spatial distribution shows high fluoride concentration along analyzed tectonic fault system and aligned on north east direction in other areas, suggesting other hydrogeological fault systems. High fluoride concentration increases according to groundwater pumping depth. The Principal Component Analysis reveals features of the groundwater mixture and individualizes water facies. In this scenery, it can be determined hydrogeological blocks associated with tectonic fault system here introduced.

引用

页码：693 / 701

页数：9