Lun, 21/06/2010 / Jue, 24/06/2010

Lun, 13/09/2004 / Jue, 16/09/2004

"Faculty of Science, Charles University (Universita Karlova); International Commission on Groundwater (ICGW), of the International Association of Hydrological Sciences (IAHS); International Ground Water Modeling Center (IGWMC); US Geological Survey (USGS)

Lun, 27/09/2004 / Vie, 01/10/2004

National Committee of Germany for IHP/UNESCO and OHP/WMO; Technical University of Braunschweig (Germany); The Berchtesgaden National Park Authority, Germany