Hydrogeological responses in tropical mountainous springs
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| Autores: | , , , |
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| Formato: | artículo |
| Fecha de Publicación: | 2018 |
| Descripción: | This study presents a hydrogeochemical analysis of spring responses (2013–2017) in the tropical mountainous region of the Central Valley of Costa Rica. The isotopic distribution of δ18O and δ2 H in rainfall resulted in a highly significant meteoric water line: δ2 H = 7.93·δ18O + 10.37 (r 2= 0.97). Rainfall isotopic composition exhibited a strong amount-dependent seasonality. The isotopic variation (δ18O) of two springs within the Barva aquifer was simulated using the FlowPC program to determine mean transit times (MTTs). Exponential-piston and dispersion distribution functions provided the best-fit to the observed isotopic composition at Flores and Sacramento springs, respectively. MTTs corresponded to 1.23 ± 0.03 (Sacramento) and 1.42 ± 0.04 (Flores) years. The greater MTT was represented by a homogeneous geochemical composition at Flores, whereas the smaller MTT at Sacramento is reflected in a more variable geochemical response. The results may be used to enhance modelling efforts in central Costa Rica, whereby scarcity of long-term data limits water resources management plans. |
| País: | Repositorio UNA |
| Institución: | Universidad Nacional de Costa Rica |
| Repositorio: | Repositorio UNA |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:null:11056/22225 |
| Acceso en línea: | http://hdl.handle.net/11056/22225 |
| Palabra clave: | BARVA AQUIFER SYSTEM COSTA RICA HYDROGEN-2 ISOTOPE HYDROLOGY MEAN TRANSIT TIMES OXYGEN-18 TROPICAL MOUNTAINOUS SPRINGS ISOTOPOS SAN JOSÉ (COSTA RICA) HIDROLOGÍA ACUÍFEROS |