Geochemical and isotopic multi-tracing (delta O-18, delta H-2, delta C-13, Delta C-14) of groundwater flow dynamics and mixing patterns in the volcanoclastic aquifer of the semiarid San Juan del Rio Basin in central Mexico
Por:
Hernandez-Perez, Eliseo, Levresse, Gilles, Carrera-Hernandez, Jaime, Inguaggiato, Claudio, Vega-Gonzalez, Marina, Corbo-Camargo, Fernando, Celia Carreon-Freyre, Dora, Billarent-Cedillo, Andrea, Sancen Contreras, Francisco Javier, Ramirez Hernandez, Cynthia Paola
Publicada:
1 nov 2022
Resumen:
Water supply in semiarid areas in Mexico depends on water extraction
from compartmentalized aquifers where large drawdown rates can be
observed due to increasing demand from urban, industrial and
agricultural users. Understanding the behavior of these aquifers is a
necessity in order to improve the estimation of water balances.
Accordingly, this study assembles both geochemical and isotopic data to
identify the source of recharge to the San Juan del Rio graben aquifer
and to determine its dynamics. The geological model developed with the
aforementioned data reveals a complex system composed of a heterogeneous
multilayered compartmentalized aquifer. The San Juan del Rio basin is
composed of (1) the Amealco perched aquifer, (2) a shallow granular
aquifer, and (3) a fractured aquifer. Hydrogeochemical and isotopic data
(delta H-2, delta O-18, delta C-13 and correct carbon activity (Delta
C-14)) allow for identification of three end-member sources: (1) local
meteoric recharge, (2) old groundwater contained in the siliciclastic
shallow aquifer, and (3) regional/local hydrothermal recharge. The
contribution of both meteoric and regional hydrogeothermal flow to the
different aquifer compartments is determined through a principal
component analysis of the hydrogeochemical data. With the aforementioned
analysis it was found that the dominant contribution source for all
aquifer compartments is meteoric water (up to 60% with a median of
50%), while the regional hydrothermal groundwater contribution
represents 15%, even for the shallow aquifer.
Filiaciones:
Hernandez-Perez, Eliseo:
Univ Nacl Autonoma Mexico, Posgrad Ciencias Tierra, Ctr Geociencias, Blvd Juriquilla 3001, Queretaro 76230, Mexico
Levresse, Gilles:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Blvd Juriquilla 3001, Queretaro 76230, Mexico
Carrera-Hernandez, Jaime:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Blvd Juriquilla 3001, Queretaro 76230, Mexico
Inguaggiato, Claudio:
Ctr Invest Cient & Educ Super Ensenada CICESE, Dept Geol, Carretera Ensenada Tijuana, Ensenada 3918, Baja California, Mexico
Vega-Gonzalez, Marina:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Blvd Juriquilla 3001, Queretaro 76230, Mexico
Corbo-Camargo, Fernando:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Blvd Juriquilla 3001, Queretaro 76230, Mexico
Celia Carreon-Freyre, Dora:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Blvd Juriquilla 3001, Queretaro 76230, Mexico
Billarent-Cedillo, Andrea:
Univ Nacl Autonoma Mexico, Posgrad Ciencias Tierra, Ctr Geociencias, Blvd Juriquilla 3001, Queretaro 76230, Mexico
Sancen Contreras, Francisco Javier:
Com Tecn Aguas Subterreneas Acuifero San Juan del, Queretaro, Mexico
Ramirez Hernandez, Cynthia Paola:
Com Tecn Aguas Subterreneas Acuifero San Juan del, Queretaro, Mexico
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