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 ...
Stage correction is currently the most frequently used type of the Carpathian streams training. It aims at decreasing the channel slope and limiting the bottom erosion, which over the last years led to a considerable channel deepening. The aim of the paper is the analysis of the stage correction effect on changes of the channel development and its functioning against its evolution during an over a hundred-year period. The investigations were conducted in the lower section of the Mszanka channel, a right tributary of the Raba River, which was wholly trained by means of stage correction. The training was conducted in three parts in the years 1977-2013. Available archival cartographic and photographic records, results of geomorphological research, etc. were used for the analysis. Information about the present functioning of the channel was obtained from geomorphological mappings conducted in 2004 and 2015. In result of training works, formerly braided Mszanka channel became transformed into a single thread and sinuous channel. 25 concrete drop structures and many steps were constructed in the bottom. The riverbanks were reinforced. In result of stage correction application the bedload was caught between the drop structures, whereas the channel below was underloaded with material. Therefore it ...
The Krzczonówka stream is left tributary of the Raba River. In 2014, during the period from April to September, the project related to the lowering of the existing debris dam was carried out. Heavy rainfall resulting in high flows occurred shortly after the start of work. In effect, large amount of debris was moved from the reach located upstream of debris dam to the reach downstream of it. This work aims to present the influence of flood discharges on the morphology of the stream channel under conditions of high sediment supply. Observations on the changing conditions of water flow and sediment transport will also be presented ...
