Impacts of rising, peak and receding phases of discharge events on erosion potential of a boreal meandering river

Flow features of a meandering river can vary seasonally and widely in the boreal zone, as seasonal variation discharges affect properties meander bends spatial location flow magnitudes. However, better understanding impacts consecutive high-discharge events zone requires further analyses. Thus, fluvial processes their magnitudes on different types (e.g., sinuosity, symmetricity) were analysed throughout an open-channel period, using accurate measurements hydrodynamic (two-dimensional) modelling. In particular, research compared discharge magnitude length evolution, whether there is difference erosion forces rising falling phases hydrographs, which has greatest relevance to forces. A case study was carried out middle (Koitajoki eastern Finland) during 2020 open water season from May October. Five considered area. shear at strongest spring flood peak, normally highest event hydrological year. Exceptionally, largest summer reached level that close floods' maximum erosional capabilities. Bed stress values indicated hydrographs are more important evolution than ascent stage, long duration downstage contributes strongly bend development. The smaller curvature larger sinuosity bends, occurs between stages. provides new insights into well reinforces results earlier studies.