Summary:

Two small catchments with features typical for the region were choosen in the Outer Eastern Carpathians (Bieszczady Mountains in Poland and Gorgany Mountains in Ukraine). Geomorphological river channel mapping was carried out. Author presented the results as the structure and typology of the stream channel and used them for environmental evaluation of mountains streams for 3 theoretical purposes: geotouristics, ichtiology and fitosociology. The method could be used in many aspects of environmental evaluation of river valleys in mountains, especially retailed with the abiotic component.