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Geofísica internacional

versión On-line ISSN 2954-436Xversión impresa ISSN 0016-7169

Geofís. Intl vol.44 no.3 Ciudad de México jul./sep. 2005

 

Articles

Geochemistry of the hydrogeological reserve of Mérida, Yucatán, Mexico

O. Escolero1 

L. E. Marín2 

B. Steinich3 

J. A. Pacheco4 

A. Molina-Maldonado2 

J. M. Anzaldo2 

1 Instituto de Geología-UNAM, Cd. Universitaria, México, D. F., CP. 04510. Email: escolero@geologia.unam.mx

2 Instituto de Geofísica-UNAM, Cd. Universitaria, Mexico, D.F., CP. 04510. Email: lmarin@geofisica.unam.mx

3 Centro de Geociencias, UNAM, Campus Juriquilla, Querétaro.

4 Facultad de Ingeniería, Universidad Autónoma de Yucatán, México.


ABSTRACT

Hydrochemical data are presented to describe the process that modifies the groundwater quality in northwest Yucatán. Solution of almost pure carbonate rocks, conservative mixing with seawater and ionic interchange in clayey limestone of middle Eocene are found. Groundwater flow is from the central zone of the study area outward. New observations confirm earlier studies on proposed conservation measures in the area. Brackish water is found several kilometers inland. Salinity increase is due to saltwater upconing in relatively deep wells or by the concentration of pumping.

KEY WORDS: Karst; groundwater quality; saltwater intrusion; limestone; Yucatán; Mexico

RESUMEN

Se utilizaron datos hidrogeoquímicos para describir los procesos que modifican la calidad del agua subterránea en el noroeste de Yucatán. Se encontró que los procesos de disolución de rocas carbonatadas de gran pureza, la mezcla con agua salada y el intercambio iónico en calizas arcillosas están presentes en la zona en estudio. Las nuevas observaciones confirman los resultados de estudios previos sobre las medidas recomendadas para la conservación del agua subterránea en la zona. Se encontró agua salobre varios kilómetros tierra adentro, cuya presencia se debe a la intrusión de fondo de agua salada en pozos relativamente profundos o por la concentración del bombeo.

PALABRAS CLAVE: Calizas; calidad del agua subterránea; intrusión de agua salobre; karst; Yucatán; México

Full text available only in PDF format.

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Received: April 12, 2003; Accepted: August 19, 2003

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