Hidrogeoquímica del Acuífero Mercedes en el oeste de Uruguay
[EN] The use of groundwater resources in Uruguay experienced a fast increase by the growth on the agriculture and dairy farm demands as well as by the easiness to drilling more deep wells since the eighties. The Mercedes Aquifer is assessed in this work from a hydrogeochemical point of view. This aq...
| Autores: | , , , , , , , |
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| Tipo de recurso: | otro |
| Fecha de publicación: | 2008 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/209703 |
| Acceso en línea: | http://hdl.handle.net/10261/209703 |
| Access Level: | acceso abierto |
| Palabra clave: | Calidad agua subterránea Acuífero Mercedes Uruguay |
| Sumario: | [EN] The use of groundwater resources in Uruguay experienced a fast increase by the growth on the agriculture and dairy farm demands as well as by the easiness to drilling more deep wells since the eighties. The Mercedes Aquifer is assessed in this work from a hydrogeochemical point of view. This aquifer is one of the most important in Uruguay attending to geographical extent and available water resources. The Mercedes Aquifer lies in the west of Uruguay. The relief is moderately undulated with low altimetry cotes (100 m). The Mercedes Aquifer is developed on the Mercedes Formation, Upper Cretaceous, which consists of thick yellowish-white, coarse conglomerates and coarse to fine sandstones and, secondarily, lenticular greenish mudstones. The maximum thickness is about 100 m. A total of 32 wells were sampled in rural areas. These wells supply groundwater for both human consumption and farming. Temperature, pH and specific conductivity were determined in the field. Samples were acidified (1% HNO3, v/v) before the analyses by inductively coupled plasma - mass spectrometry (ICP-MS) and inductively coupled plasma – optical emission spectrometry (ICP-OES): Na, K, Mg, Ca, SO42-, Cl-, Si, Al, As, B, Ba, Br, Co, Cr, Cu, Fe, Li, Mn, Mo, Ni, P, Pb, Rb, Sb, Sr, Th, U, V, and Zn. Results are discussed taking into account the water quality for different uses as well as from a hydrogeological point of view in relation to the origin and mobility of major ions and trace elements. |
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