Citas bibligráficas
Guimet, H., (2017). Modelación y caracterización de un ensayo de trazadores del tipo push-pull en un acuífero costero [Tesis, Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/2678
Guimet, H., Modelación y caracterización de un ensayo de trazadores del tipo push-pull en un acuífero costero [Tesis]. : Universidad Nacional Agraria La Molina; 2017. https://hdl.handle.net/20.500.12996/2678
@misc{sunedu/3953378,
title = "Modelación y caracterización de un ensayo de trazadores del tipo push-pull en un acuífero costero",
author = "Guimet Gutarra, Henry Andre",
publisher = "Universidad Nacional Agraria La Molina",
year = "2017"
}
In this work was presented a modeling study previous to a push-pull conservative and reactive tracer test. The document aims to identify the possible problems that may present the tracer test taking into account the special characteristics of a coastal aquifer. First, a hydrogeochemically characterization of the aquifer was performed classifying the types of water and identifying the main chemical reactions present in the interaction of water from the continent with that seawater intrusion. The chemical processes of interest that were identified were: cation exchange, dissolution - precipitation of minerals and to smaller degree oxidation of organic matter. Then, the modeling that was performed using the codes TRANSIN, TRANSDENS and RETRASO. The injection of a conservative tracer in a medium of constant density and with matrix diffusion was modeled. Furthermore, assuming modeled variable density flow, the injection was modeled of saline water a conservative tracer into an initially fresh medium and vice versa. Subsequently, a model was realized where the tracer can interact with the aquifer according to the chemical reactions identified by the hydrogeochemical characterization. The results of the modeling showed that variable density flow is an important process which notably considerably diminishes the recovery of tracer and therefore the usefulness of the test (from 98 to 28 per cent), when the density of the injected water is different from that of the initial water. The matrix diffusion and chemical reactions have an effect and therefore the test can be used to quantify these processes. However, to detect and chemical reactions chemical processes, the chemical composition of the injected water must be sufficient different from that of the initial water.
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