Reference : Interpretation of a tracer test at Brévilles after 2 years of monitoring
Reports : External report
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
Engineering, computing & technology : Geological, petroleum & mining engineering
http://hdl.handle.net/2268/78495
Interpretation of a tracer test at Brévilles after 2 years of monitoring
English
Goderniaux, Pascal mailto [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Hydrogéologie & Géologie de l'environnement >]
Gutierrez, Alexis [BRGM Orléans (France) > > Service Eau > >]
Brouyère, Serge mailto [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Hydrogéologie & Géologie de l'environnement >]
Mar-2008
29
Deliverable H2.7 FP6 Integrated Project AquaTerra (n° 505428 GOCE)
[en] Brévilles spring ; tracer experiment ; tracer test modelling ; FVPDM
[en] To understand and predict the behaviour and transfer of diffuse contamination, a
small catchment is intensively studied in the vicinity of Paris. A multi tracer test
involving a new technique, the FVPDM method (Finite Volume Point Dilution
Method - Brouyère et al., 2008) has been performed in natural flow conditions.
Injections of four different tracers (uranine, sulforhodamine B, lithium chloride
and potassium iodide) took place in four piezometers involving different areas of
the aquifer and different depth. This tracer test follows a former test briefly
described. A particularly long monitoring (Nov-2005 to Feb-2008) demonstrates
the existence of several transport velocities within the sandy layer, which seems
linked to the decrease of hydraulic conductivity with depth. Absence of recovery
of two tracers confirms the results of the former test and identifies spatial
heterogeneities probably due to the geological structure. The new insight and
parameter quantification brought by interpretation of these tests contributes to a
better characterization of the saturated zone and shall be exploited through
modelling for transport predictions of pesticides.
Aquapôle - AQUAPOLE
Commission européenne : Direction générale de la Recherche
AquaTerra - Integrated Modelling of the river-sediment-soil-groundwater system; advanced tools for the management of catchment areas and river basins in the context of global change
Commission européenne - Direction de la Recherche
Researchers ; Professionals
http://hdl.handle.net/2268/78495
FP6 Integrated Project AquaTerra (n° 505428 GOCE) co-funded by the European Commission within the Sixth Framework Programme (2002-2006) undere the thematic priority: Sustainable development, global change and ecosystems

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