In a context of VOCl contamination of an abstraction well, the origin of the contamination in unknown.
The aim of this campaign was to monitor groundwater fluxes in 2 piezometers located upstream and downstream of a pumping well.
The continuous flux measurements carried out over 72 hours enabled us to:
– better constrain the conceptual hydrogeological model of the site (measurement of live fluxes during pump operation and shutdown)
– gain a better understanding of pollution dispersion at the site
Groundwater fluxes were also measured at different horizons (logging) in order to obtain a vertical characterisation that enhanced our knowledge of the site
Groundwater was sampled at several levels.
Groundwater fluxes were measured on these same levels.
By cross-referencing these 2 pieces of information, Nagaré was able to measure the mass fluxes of pollutants over the same intervals.