Flood and vortex scour of the channel bed of the Prosna River, and their depth range

Authors:

• Zygmunt Młynarczyk,
• Karol Rotnicki

Abstract

Processes leading to temporary scour and fill of the bed of an alluvial channel result in a substantial increase in the thickness of reworked alluvial sediment in the valley floors of meandering rivers. This leads to a considerable increase in the thickness of lateral accretion deposits. The processes include flood scour and vortex scour of the bed. Floods increase the thickness of the reworked channel alluvial deposits by 30% to 66% in relation to the thickness determined by the elevation of the normal bed and the bankfull stage. Vortex scour can increase the thickness by as much as 90-95%. -from English summary