The Water Framework Directive (2000/60/EC), implemented in Poland, obliges to improve rivers ecological state. A change of fluvial system management methods, consisting in reduction of technical means usage at channel maintenance, is necessary. The channels of mountain rivers and streams are especially interference-sensitive. Wrong river training works in these channels lead in the short time to drastic changes along them. The consequences of these changes are not only environmental, but also economic. This study demonstrates the present state of knowledge about the reasons of Carpathian channel changes, channel response to individual interferences, and modern alternative solutions in the matter of channel management. A method of comprehensive geomorphologic investigations of mountain channels is also presented. According to the opinion of the authors these investigations should be carried out in order to better recognize functioning of these channels. The main purpose of the work is to show the results of some activities which seems to be wrong in present time. The necessity of interdisciplinary approach to fluvial system management is accented because determination of adequate works improving environmental conditions of rivers requires research of correlation between many environmental components. Therefore this work is addressed to representatives of different disciplines, mainly to civil ...
