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[18653] Artykuł: Appraise of consequences of erosive processes occurring in the Skawa river sectorCzasopismo: Environment Protection Engineering Tom: 37, Zeszyt: 1, Strony: 83-92ISSN: 0324-8828 Wydawca: TECHNICAL UNIV WROCLAW, WYBRZEZE WYSPIANSKIEGO 27, EXPORT-IMPORT DIVISION, 50-370 WROCLAW, POLAND Opublikowano: 2011 Autorzy / Redaktorzy / Twórcy
Grupa MNiSW: Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A) Punkty MNiSW: 15 Klasyfikacja Web of Science: Article Web of Science YADDA/CEON Słowa kluczowe: erozja  erozja brzegu  rzeki  transport osadów  erozja brzegów rzeki  koryto rzeki  Keywords: erosion  rivers  sediment transport  bank erosion  river channels  |
Erosive processes have been evaluated in a sector of the Skawa river characterized by high pliability to erosion (proportion between the bend radius and the river channel width equals on the average 6.5). Within two years, channel erosion caused by 6 freshets was investigated with flows Q within the range of probability of waters from 20% to 50%. Bank and bottom erosion as well as transportation of the bed material and material from falls of bank slopes were found to occur. Intensity of this transportation was calculated based on Bagnold's equation. The calculated value of transported bed load was comparable with that obtained from direct measurements. The effects of transportation were also reflected by changes of the grain size distributions after passage of a freshet wave. Bank erosion was the dominating process that changed the river channel shape. It was found that in the examined sector the retreat of the bank slope proceeded at the rate of 1.20 m/year.