22-27 September 2019
Trade Fairs and Congress Center (FYCMA)
Europe/Madrid timezone

Numerical analysis of periodic transient contaminant-leaching episodes in the unsaturated zone

23 Sep 2019, 16:00
1h
Trade Fairs and Congress Center (FYCMA)

Trade Fairs and Congress Center (FYCMA)

Av. de José Ortega y Gasset, 201 29006 Malaga, Spain
Poster Topic 5.3 - Advanced modelling tools for subsurface hydrology: from the vadose zone to deep environments Poster with refreshments

Speaker

Javier Samper (Universidad de A Coruña)

Description

The concentration of contaminants in groundwater underneath landfills and mine tailing piles and treatment facilities increases when the water table rises sharply due recharge events or the rise of the level rising a negihboor rivers connected to the aquifer.
Reactive contaminants may persist for long periods of time due to mineral precipitation and sorption reactions. Here, we present a numerical 2-D flow and solute transport model in a vertical plane to study the leaching of uranium from the unsaturated zone underneath a uranium tailings pile. Model results show that the uranium concentration increases linearly when the leachate flux increases and the upstream flux and the upstream flow of unpolluted groundwater decreases. The concentration of uranium increases in response to the rise of the water table. The peak of uranium concentration takes place about 40 days after the maximum water level in a point located 30 m downstream the uranium source.

Primary authors

Javier Samper (Universidad de A Coruña) Dr ALBA MON (UNIVERSIDAD DE A CORUÑA) Mr BRUNO PISANI (UNIVERSIDAD DE A CORUÑA) Dr ACACIA NAVES (UNIVERSIDAD DE A CORUÑA) Prof. LUIS MONTENEGRO (UNIVERSIDAD DE A CORUÑA)

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