919 resultados para Roque Nublo (Gran Canaria)


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Programa de doctorado: Física, Matemáticas, Geología y Clima. La fecha de publicación es la fecha de lectura

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Programa de doctorado: Microbiología Clínica y Enfermedades Infecciosas. La fecha de publicación es la fecha de lectura

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Programa de doctorado: Historiografía, Fuentes y Métodos de la Investigación Histórica. La fecha de publicación es la fecha de lectura

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Programa de doctorado: Microbiología y enfermedades infecciosas

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Programa de doctorado: Avances en Medicina Interna. La fecha de publicación es la fecha de lectura

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[EN]Rn has been detected in 28 groundwater samples from the northeast of Gran Canaria (Canary Islands, Spain) utilizing a closed loop system consisting of an AlphaGUARD monitor that measures radon activity concentration in the air by means of an ionization chamber, and an AquaKIT set that transfers dissolved radon in the water samples to the air within the circuit. Radon concentration in the water samples studied varies between 0.3 and 76.9 Bq/L. Spanish radiological protection regulations limit the concentration of 222Rn for drinking water to 100 Bq/L, therefore the values obtained for all the analyzed samples are below this threshold. The hydrogeological study reveals a significant correspondence between the radon activity concentration and the material characteristics of the aquifer.

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[EN]The chloride mass balance method was used to estimate the average diffuse groundwater recharge on northeastern Gran Canaria (Canary Islands), where the largest recharge to the volcanic island aquifer occurs. Rainwater was sampled monthly in ten rainwater collectors to determine the bulk deposition rate of chloride for the 2008–2014 period. Average chloride deposition decreases inwardly from more than 10 g·m−2 ·year−1 to about 4 g·m−2 ·year−1 . The application of the chloride mass balance method resulted in an estimated average recharge of about 28 hm3 /year or 92 mm/year (24% of precipitation) in the study area after subtracting chloride loss with surface runoff.

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Programa de doctorado: Tecnología Industrial. La fecha de publicación es la fecha de lectura.