Resumo

CONSTAIN ARAGON, ALFREDO JOSE. TRANSPORT VERIFICATION FOR RADIACTIVE TRACER USING A TIME FUNCTION COEFFICIENT IN NATURAL STREAMS. Dyna rev.fac.nac.minas [online]. 2012, vol.79, n.175, pp.150-157. ISSN 0012-7353.

Nowadays conservative tracers are used in water studies because obtained information is varied and accurate, enhancing the knowledge on fluid dynamics. However, at the same time some theoretical difficulties are found limiting the scope of such studies. Some correspond to the very interpretation of tracer curve, which within the state of the art should be Fickian in nature. In this Article an alternate view is presented starting from a new definition of mean velocity of flow with longitudinal dispersion coefficient as time function which represents well the experimental dye asymmetric curves. Given the accuracy and easiness of this method it may be applied to contamination studies. As an example it is applied herein to a radioactive tracer study documented by H. B. Fischer in 60's years; specifically it is discussed the measurement of Activity comparing it with the current method involving the law of conservation of mass and then some remarks are done over the precision of method.

Palavras-chave : Radioactive tracers; hydrometrics; new transport models.

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