Affiliation:
1. Universidade Federal do Ceará, Brazil
Abstract
The objective of this research was to identify and quantify the primary processes responsible for the increase in salinity observed in the alluvial aquifer during the dry season. Multivariate statistical analysis and inverse geochemical modeling were used to simulate possible salinization mechanisms in the alluvial aquifer. For this, by quantifying electrical conductivity and the concentrations of the ions Ca2+, Mg2+, Na+, K+, Cl-, HCO3- and SO42- in waters from the crystalline basement near the study area, water reservoirs near the alluvial aquifer and the studied alluvial aquifer, groups were formed and discriminant analysis was applied. Significance tests showed that direct evaporation has not only an influence on the alluvial aquifer, but also a mean volumetric contribution of 15.8% from waters of the crystalline basement, accompanied by processes of salt dissolution and precipitation, which would also justify the increase in salinity observed in the alluvial aquifer in the dry period.
Subject
Agronomy and Crop Science,Environmental Engineering
Reference26 articles.
1. Uso e qualidade da água subterrânea para irrigação no semi-árido piauiense;Andrade A. S.;Revista Brasileira de Engenharia Agrícola e Ambiental,2006
2. Os pequenos aquíferos aluviais nas áreas cristalinas semi-áridas: funcionamento e estratégias de gestão. Estudo de caso no Nordeste brasileiro;Burte J. D. P.,2008
3. Multivariate statistical analysis of geochemical data as indicative of the hydrogeochemical evolution of groundwater in a sedimentary rock aquifer system;Cloutier V.;Journal of Hydrology,2008
4. Aspectos da salinização das águas do aquífero cristalino no estado do Rio Grande do Norte, Nordeste do Brasil;Costa A. M. B.;Águas Subterrâneas,2006
5. Estudo geoquímico preliminar das águas do Nordeste do Brasil;Cruz W. B.,1968
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献