Ionic exchange in groundwater hydrochemical evolution. Study case: the drainage basin of El Pescado creek (Buenos Aires province, Argentina)

被引：0
作者：
Eleonora S. Carol
Eduardo E. Kruse
Patricia C. Laurencena
Adolfo Rojo
Marta H. Deluchi
机构：
[1] Universidad Nacional de La Plata (UNLP),Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Facultad de Ciencias Naturales y Museo
[2] Universidad Nacional de La Plata (UNLP),Comisión de Investigaciones Científicas (CIC), Facultad de Ciencias Naturales y Museo
来源：
Environmental Earth Sciences | 2012年 / 65卷
关键词：
Base exchange; Phreatic aquifer; Groundwater recharge area; Groundwater discharge area; Pampean plain;
D O I：
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中图分类号：
学科分类号：
摘要：
The phreatic aquifer beneath the Pampean plain, in eastern central Argentina, constitutes a relevant source of water supply in the area. The objective of this work was to assess the significance of the cation exchange processes in the hydrochemical evolution of this aquifer, based on a study case located in the middle and upper basin of the El Pescado creek. Results indicate that Ca2+/Na+ exchange is the main process determining the evolution of groundwater from the recharge areas (Ca–HCO3) towards the local discharge areas (Na–HCO3), as well as representing a source of Na+ contribution to the water in the aquifer. This hydrochemical characteristic is central to the identification of local discharge areas within a plain environment which extends regionally. The ion exchange capacity of these discharge areas has environmental importance, due to its influence on groundwater quality and potential groundwater uses. These results may be applied to any aquifer sharing similar hydrogeological characteristics.
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页码：421 / 428
页数：7
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