The Institute of Archaeology of Academy of Sciences of the Czech Republic in Brno organized in the days of 24.- 25.9.2012 in the town of Hodonín a colloquium "Usus aquarum - Water and Water Structures in the LIfe of the Early Middle Ages Societies of the Central Europe" within the conference series "Internationale Tagungen in Mikulčice". Since the deditors obtained for the planned proceedings of papers in the 10. volume of publication series "Internationale Tagungen in Mikulčice" only 5 papers, these papers were relocated into the journal Synopsis of researches and published here in the block following this introduciton. This is a brief report on the colloquium - its course, aim, programme, etc., Lumír Poláček., and Obsahuje seznam literatury