Technical summary of the SEDE workshop on the use of hydrogeochemical information in testing groundwater flow models

Groundwater chemistry may provide a method to test site-specific, time-dependent groundwater flow models. The SEDE Coordinating Group took the initiative to organize a workshop on 'Use of hydrogeochemical information in testing groundwater flow models' to assess the progress to date in this multidisciplinary aspect of site characterisation and evaluation. This technical Summary is aimed at reflecting the material that was presented and at providing an overview of the main outcomes and achievements of the workshop. In particular, it assesses the progress that has recently been made in the integration of flow modelling and hydro-geochemistry within several waste management programmes, identifies limitations in this approach, and draws together the recommendations for further developments. A synoptic table of the key features of the various projects and studies is also provided. (K.A.)