Modeling tools DTU Env: Julie Chambon, Poul Bjerg and Philip Binning GEUS:Bertel Nilsson and PhDA Orbicon: Niels Døssing Overheu

Subject Hydrogeological modeling Objectives Development of models from site characterization and geostatistical analysis Horizontal/vertical fractures Sand lenses Clay matrix Model type (discrete/EPM/hybrid 2D/3D?) Temporal/spacial scales Assess uncertainties Activities From descriptive to quantative geological description (geostatistics, parameters), fracture/matrix network generation Literature review, comparative study What does it means for the parameters and model types?

Subject Fate and Transport modeling Objectives Characterization of tranport processes Diffusion/Dispersion/Advection Sorption on clay (based on foc?, linear?) Characterization of dechlorination Specific degraders Presence of competitive bacteria Substrate consomption Redox conditions Activities Existing approach, literature values Lab experiment, estimation methods Dechlorination experiments with modeling perspectives (what do we need to know?) Literature review, methods (geochemistry, kinetics, ??)

Subject Model applications Objectives Application of numerical tools Design tools Guidelines for model Activities Adapt modeling tools to the different "end- users" Choice of software Susbtrate consumption in function of redox conditions, competitive bacteria… Flux reduction in function of remediation Remediation times Risk assessment Remediation strategy Model requirements ->Parameters list, processes