Rapid isotopic changes in groundwater, upper Rio Guanajuato catchment, Mexico
Signifi cant changes in the isotopic composition of groundwater in the upper catchment of Rio Guanajuato, Mexico, weredetected in two independent sets of samples for 3 % of the 1600 highproduction wells in the area. Sampling was done in December1998 (53 samples), and in July August 2003 (41 sampl...
| Autores: | , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2007 |
| País: | México |
| Recursos: | Universidad Nacional Autónoma de México |
| Repositório: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:56846105 |
| Acesso em linha: | https://www.redalyc.org/articulo.oa?id=56846105 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Ciencias de la Tierra Mexico Guanajuato rapid aquifer evolution Recent isotopic change in oxygen18 and deuterium in groundwater |
| Resumo: | Signifi cant changes in the isotopic composition of groundwater in the upper catchment of Rio Guanajuato, Mexico, weredetected in two independent sets of samples for 3 % of the 1600 highproduction wells in the area. Sampling was done in December1998 (53 samples), and in July August 2003 (41 samples). Average deuterium concentration did not change between 1998 and2003 but the average oxygen18 concentration suggested a generalized dilution from deep water from infi ltrated local precipitation.This regional change occurred within 56 months, indicating a highly dynamic hydrogeologic system. Fast replenishment of aquiferstorage, or non sustainable overpumping of old aquifer reserves, are possible explanations. |
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