ABSTRACT
We inventoried large wood (LW) in two reaches of a lowland meandering river (the Odra, Czech Republic) to assess the effect of different channel geometry on retention and longitudinal distribution of LW. Moreover, we monitored LW mobility in the wider reach (2016-2019 period). The narrower reach had more LW pieces (8.5 LW/100 m) and higher LW volume (12.8 m3/ha), whereas the wider reach had less LW pieces (4.4 LW/100 m) and lower LW volume (9.4 m3/ha). The cluster analysis illustrated rather homogenous spreading of LW in the narrower reach, but the wider reach indicated long segments without any LW and high values of cluster densities related to the positions of log jams. The intensive movement of LW occurred only during discharges greater than >Q1. The travel distances were in the order of hundred meters during high flows (up to >Q2), but note quite limited number of recovered LW pieces.
