First Workshop on Hardrock Hydrogeology of the Bohemian Massif - Rohanov 1994

Second Workshop on Hardrock Hydrogeology of the Bohemian Massif - Borowice 1996

First Workshop of the Iberian Working Group on Hardrock Hydrogeology - Miraflores de la Sierra 1997

Second Workshop on Hardrock Hydrogeology of the Fennoscandian Shield - Oslo 2001

First Workshop of the Regional WG of the Middle and East Mediterranean - Tinos 2002

International Conference on „Groundwater in Fractured Rocks" - Prague 2003

Third Workshop of the Fennoscandian RWG - Helsinki 2004

Second Workshop of the Iberian RWG – Évora 2005

Fourth Workshop of the RWG of the Bohemian Massif – Jugowice 2006