Luis Eduardo Toro

Fundación Valle del Lili

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María Consuelo Vargas

Colombian Geological Survey

J.D. Taupin

Laboratoire HydroSciences Montpellier

Jean‐Denis Taupin

Laboratoire HydroSciences Montpellier

Hugo Maturana

University of Antofagasta

Vanesa Paredes

Corporación para el Desarrollo Sostenible del Urabá

Jean Denis Taupin

Evelyn Aguirre

Comisión Chilena de Energía Nuclear

Ramón Aravena

University of Waterloo

José F. Muñoz

Pontificia Universidad Católica de Chile

Ricardo Oyarzún

University of La Serena

Cooperative Institutions

University of La Serena

University of Castilla-La Mancha

Centro de Recursos Educativos Avanzados

Laboratoire HydroSciences Montpellier

Université de Montpellier

Institut de Recherche pour le Développement

Centre National de la Recherche Scientifique

Milieux environnementaux, transferts et interactions dans les hydrosystèmes et les sols

Laboratoire de Glaciologie et Géophysique de l’Environnement

Corporación para el Desarrollo Sostenible del Urabá

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A hydrogeochemistry and isotopic approach for the assessment of surface water–groundwater dynamics in an arid basin: the Limarí watershed, North-Central Chile

Environmental Earth Sciences (2014)

Ricardo Oyarzún Elizabeth Jofré P Morales Hugo Maturana Jorge Oyarzún

10.1007/s12665-014-3393-4

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Estudio hidrogeoquímico e isotópico en los acuíferos de la zona de Maicao, Colombia

Boletín Geológico (2008)

Jean Denis Taupin Luis Eduardo Toro María Consuelo Vargas

A combined hydrogeological study using hydrochemistry and environmental isotopes (deuterium, oxygen 18, tritium, carbon 13, and radiocarbon) has been completed in the region of Maicao (Colombia). The study area encompasses 650 km2 and includes three aquifers: the Cretaceous Aquifer (limestones), south of the Oca fault, the Tertiary Aquifer (semi-consolidated marine sediments) and the Quaternary Aquifer (unconsolidated sediments of continental and marine origins). Both the Quaternary and Tertiary aquifers are located just to the north of the same fault (elevation between 40 and 600 m above sea level). The Quaternary Aquifer is an unconfined aquifer underlain by the Mongui Formation (a confined Tertiary Aquifer). Lts regional groundwater flow is northward. The climatic conditions are semiarid, with an average temperature of 27 C, annual average precipitation of 350 mm in the north and 1200 mm in the south (September to November). Two types of groundwater have been found in Maicao: the first, low salinity and young (less than 50 years), is located in the Cretaceous Aquifer and in the sector of the Quaternary Aquifer adjacent to the Carraipia River (main superficial water body in the project area), the second, moderately mineralized, isotopically depleted with respect to the first group and older (more than 7900 years), is located in the Tertiary Aquifer and in the central and northern sectors of the Quaternary Aquifer. Results of this study show that the recharge of the Quaternary Aquifer which is the aquifer most extensively used by the inhabitants of Maicao is slow and is, therefore, susceptible to depletion if no measures are taken to insure rational use.

10.32685/0120-1425/boletingeo.42.2008.20

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Groundwater evolution and mean water age inferred from hydrochemical and isotopic tracers in a tropical confined aquifer

Hydrological Processes (2018)

Pedro Villegas Vanesa Paredes Teresita Betancur J.D. Taupin Luis Eduardo Toro

Abstract The coastal confined aquifer in the Gulf of Urabá (Colombia) is an important water source for the banana agro‐industry as well as for urban and rural communities. However, the main processes controlling recharge and mixing in the aquifer are still poorly understood. Hydrochemical analyses and stable isotope monitoring were conducted to (a) determine groundwater recharge origin, mean groundwater age, and the main processes governing groundwater chemistry and the potential mixing of marine water and the influence of diffusive processes from the two surrounding aquitard layers. Hydrochemical data indicate that the main processes affecting the dissolved chemical composition include cation exchange, dissolution of carbonated and CO 2 , and silicate weathering. δ 18 O and δ 2 H compositions combined with 14 C data highlight the differences in climatic conditions between the recharge zone and the confined section of the aquifer, which is close to the Atlantic Ocean. Groundwater samples with 14 C ages from recent to 28,300 years BP show a depleted isotopic trend ranging from −6.43‰ to −9.14‰ in δ 18 O and from −43.2‰ to −65.7‰ in δ 2 H. The most depleted δ 18 O and δ 2 H compositions suggest a cooler recharge climate than the current conditions (corresponding to the last glacial period of the late Pleistocene). Depleted δ 13 C values in the total dissolved inorganic carbon indicate the existence of organic material oxidation processes within the geologic formation. These results can be used or transferred to enhance groundwater modelling efforts in other confined coastal aquifers of South America where scarcity of long‐term monitoring data limits water resources planification under a changing climate.

δ18O

10.1002/hyp.13160

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Etude géochimique et isotopique des aquifères dans la zone de Maicao (Colombie) / Study of the geochemistry and isotopic composition of aquifers in the Maicao region (Columbia)

Hydrological Sciences Journal (2009)

Jean‐Denis Taupin Luis Eduardo Toro María Consuelo Vargas

Abstract A combined study of the hydrochemistry and environmental isotopes was carried out in the aquifers in the region of Maicao, in northern Colombia. The aim is to develop a conceptual circulation model for better management of the water resources. Three sedimentary aquifers can be defined by their geology: Cretaceous and Quaternary, which are unconfined, and a confined Tertiary zone. Two types of groundwater were identified. The first, of moderate salinity and having a recently renewed part (less than 50 years) is located in the Cretaceous aquifer and in a sector of the Quaternary aquifer near the Carraipía River (main surface water body in the study area). The second, of higher mineralization and older (more than 7900 years BP), which also shows more depleted isotopic values compared to the first group, is represented by the Tertiary aquifer and the Quaternary aquifer outside the zone of the Carraipia River. The absence of any actual recharge to the Quaternary aquifer, the most used water resource, enhances the need for the setting up of a rigourous regional water management policy. Résumé Une étude chimique et isotopique a été réalisée dans les aquifères de la région de Maicao, zone semi-aride, au nord de la Colombie. L'objectif est de proposer un modèle conceptuel de circulation pour améliorer la gestion de la ressource. Trois aquifères sédimentaires peuvent être différenciés géologiquement: Crétacé et Quaternaire de type libre, et Tertiaire captif. Deux types d'eaux souterraines ont pu être déterminés par la chimie et les isotopes. Le premier de minéralisation modérée (bicarbonatée calcique), avec une part de renouvellement récent (moins de 50 ans) correspond principalement aux eaux de l'aquifère Crétacé et à celles d'une petite frange de l'aquifère Quaternaire bordant le Río Carraipía, principal écoulement superficiel de la zone d'étude. Le second, de minéralisation plus forte (chlorurée sodique), d'âge plus ancien (> à 7900 ans BP), plus appauvri en isotope de l'eau par rapport aux eaux du premier groupe, correspond aux eaux du Tertiaire et à celles du Quaternaire en dehors de la bordure du Rio Carraipia. L'absence de recharge actuelle de l'aquifère Quaternaire, le plus sollicité, montre la nécessité de la mise en place rigoureuse d'une politique régionale de gestion de l'eau. Key words: hydrogeologyColombiastable water isotopeswater chemistrydatingMots clefs: hydrogéologieColombieisotopes stables de l'eauchimiedatation

10.1623/hysj.54.3.538

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Citations (6)