Summary:

Paper concerns show of laboratory experiment program of the electricelectronic barrier application ingoing to Electronic Deterrent Fish System to its protection against negative influence of hydrotechnical facilities. Investigations have been performed at Hydraulic Laboratory of Wrocław University of Environmental and Life Sciences, and will be tend towards determination of optimal technical parameters of the tested facilities for specified hydraulic conditions within the water plants. The Union Water Instruction and national controls determined requirements fish protection of inland waters. Free two-environment fish migration in canalized rivers can be realised by water plant modernization based on construction of fish passes friendly for environmental and assembly of electricelectronic facilities as barriers. In our opinion these barriers should be enable fish migration upwards and downwards, and its localization and construction should be secure simpler passage across fish passes. This publication has been coasted from the research project means No. 00029-61535-OR0100002/06 on “Efficiency studies of the facilities to control of fish behaviour at inlets to water intakes and fish passes”, realised by Wrocław University of Environmental and Life Sciences. This project is financed by European Union and national budget in frame of Sectorial Operating System on “Fishery and Fish processing 2004-2006”.