NDLI: Anthropic effects on hydrochemical characteristics of the Valle de Toluca aquifer (central Mexico)

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Anthropic effects on hydrochemical characteristics of the Valle de Toluca aquifer (central Mexico)

Content Provider	Springer Nature Link
Author	Esteller, M. V. Andreu, J. M.
Copyright Year	2005
Abstract	The Valle de Toluca aquifer, located in the Highlands of Mexico, is subject to intensive exploitation to meet the water demand in the valley, as well as for part of Mexico City. This intensive exploitation has produced a decline in groundwater level, land subsidence problems and a decrease in river and spring flows. This study is aimed at determining the extent to which the intensive groundwater abstraction is able to affect and modify the chemical characteristics of the water, using statistical techniques and historical data on the main physico-chemical parameters. Some changes in the chemical characteristics have been verified; initial water abstractions were mainly derived from a local flow zone (rainwater recharge and lateral flows from other aquifers), but currently the chemical characteristics are those of a regional flow zone, revealed by waters of sodium bicarbonate type. An increase in nitrate content has also occurred, although only occasionally is the limit for potable water (50 mg NO$_{3}$$^{-}$ L$^{-1}$) exceeded.L’aquifère Valle de Toluca, localisé dans les Hautes Terres du Mexique, est sujet à l’exploitation intensive pour combler la demande importante en eau dans la vallée et dans une partie de Mexico. Cette exploitation intensive a causé une baisse importante des niveaux piézométriques, des problèmes d’affaissement et de baisse de débits des sources et des rivières. Cette étude a pour objectif de déterminé la limite jusqu’à laquelle l’exploitation intensive pourra affecté et modifié les caractéristiques chimiques de l’eau, en utilisant des techniques statistiques et des données historiques des principaux paramètres physico-chimiques. Certains changements des caractéristiques chimiques ont été vérifiés ; les premières eaux captées ont été compensées par d’autres zones d’alimentation (recharge par les eaux de pluie et écoulements latéraux venant d’autres aquifères), mais couramment les caractéristiques chimiques sont bien ceux de la zone d’écoulement régional, à faciès sodi bicarbonaté. Une augmentation des concentrations en nitrate est également mis en valeur, néanmoins la limite de potabilité (50 mg/l) est rarement dépassée.El acuífero del Valle de Toluca, localizado en el Altiplano Mexicano, se encuentra sometido a una intensa explotación para cubrir las necesidades de agua en el propio valle, así como parte de las de Ciudad de México. Los altos niveles de explotación han provocado el descenso del nivel piezométrico, problemas de subsidencia, disminución de caudales en ríos y desecación de manantiales. Este estudio pretender determinar en qué grado esta intensiva extracción del agua subterránea es capaz de afectar y modificar el quimismo del agua. Para ello se han empleado técnicas estadísticas y datos históricos de los principales parámetros físico-químicos. Se ha podido comprobar que existen algunos cambios en el quimismo, ya que, inicialmente, el agua extraída del acuífero estaba ligada en gran medida a un flujo local (recarga por agua de lluvia y por alimentación lateral desde otros acuíferos) mientras que ahora el quimismo es característico de un flujo regional, puesto de manifiesto por aguas de tipo bicarbonatado sódico. Adicionalmente, también se ha producido un aumento del contenido de nitratos, aunque sólo de forma ocasional se sobrepasa el límite para agua potable (50 mg NO$_{3}$$^{−}$ L$^{−1}$).
Starting Page	378
Ending Page	390
Page Count	13
File Format	PDF
ISSN	14312174
Journal	Hydrogeology Journal
Volume Number	13
Issue Number	2
e-ISSN	14350157
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-01-13
Publisher Institution	International Association of Hydrogeologists
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Groundwater management Over-abstraction Hydrochemistry Pollution Mexico
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Water Science and Technology

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